Updated on 2025/01/29

写真a

 
Tojo Motoaki
 
Organization
Graduate School of Agriculture Department of Agricultural Biology Professor
School of Agriculture Department of Agricultural Biology
Title
Professor
Affiliation
Institute of Agriculture
Contact information
メールアドレス
Homepage
https://www.omu.ac.jp/agri/plantpath/home/plantpathology.html

Position

  • Graduate School of Agriculture Department of Agricultural Biology 

    Professor  2022.04 - Now

  • School of Agriculture Department of Agricultural Biology 

    Professor  2022.04 - Now

Degree

  • 博士（農学） （ Others ）

Research Areas

  • Environmental Science/Agriculture Science / Plant protection science  / Plant pathology

  • Life Science / Biodiversity and systematics

  • Environmental Science/Agriculture Science / Conservation of biological resources

  • Environmental Science/Agriculture Science / Environmental impact assessment

  • Environmental Science/Agriculture Science / Social-ecological systems

  • Environmental Science/Agriculture Science / Environmental policy and social systems

  • Environmental Science/Agriculture Science / Environmental impact assessment

  • Environmental Science/Agriculture Science / Plant protection science

  • Environmental Science/Agriculture Science / Sound material-cycle social systems

  • Life Science / Biodiversity and systematics

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Research Interests

  • 自然共生システム

  • 環境影響評価

  • 植物病理学

  • 植物保護

  • Plant protection

  • Environmental Assessment

Research subject summary

  • 植物病害とくに土壌伝染性の卵菌と真菌による病害の分類学的および生態学的研究

Professional Memberships

  • 日本植物病理学会

    1988.04 - Now

  • 米国植物病理学会

    2005.01 - Now   Overseas

  • 日本水産増殖学会

    2021.01 - Now   Domestic

  • 糸状菌分子生物学研究会

    2005.01 - Now   Domestic

  • 日本微生物生態学会

    1995.04 - 2005.03   Domestic

  • 日本芝草学会

    1990.04 - Now

  • 関西病虫害研究会

    1988.04 - Now

  • 日本菌学会

    1988.04 - Now   Domestic

  • 日本土壌微生物学会

    1988.04 - Now

  • 日本菌学会

  • 日本芝草学会

  • 日本植物病理学会

  • 日本微生物生態学会

  • 日本土壌微生物学会

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Committee Memberships (off-campus)

  • 評議委員   日本植物病理学会  

    2020.01 - Now 

  • 編集委員   日本植物病理学会  

    2016.01 - 2021.12 

  • 評議員   日本土壌微生物学会  

    2020.01 - Now 

  • 幹事   関西病虫害研究会  

    2016.04 - Now 

  • バイオコントロール研究会幹事   日本植物病理学会  

    1995.04 - Now 

Awards

  • 第3回大阪テックプラングランプリ企業賞

    2021.11   Osaka Tech Planter  

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    Country：Japan

  • 日本作物学会論文賞

    2015.03   日本作物学会  

  • The Naohide Hiratsuka Award

    2012.05   The Mycological Society of Japan  

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    Country：Japan

  • 大阪府立大学学長顕彰

    1999.06   大阪府立大学  

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    Country：Japan

  • 日本植物病理学会学術奨励賞

    1998.05   日本植物病理学会  

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    Country：Japan

Job Career (off-campus)

  • 東京大学大学院農学生命科学研究科非常勤講師

    2020.09 - 2021.01

  • 第49次南極観測隊員（国立極地研究所・英国南極調査所の交換科学者）

    2007.11 - 2008.02

  • - 大阪府立大学 准教授

    2007

  • - Osaka Prefecture University, Associate Professor

    2006

  • 米国ノースカロライナ州立大学客員研究員(学術振興会科研費在外研究員）

    2005.04 - 2005.10

  • ロシア科学アカデミー植物園客員研究員(財団法人日本産業技術振興協会平成１５年度国際共同研究先導調査事業費在外研究員）

    2004.02 - 2004.03

  • ノルウェー国立作物研究所客員研究員(学術振興会科研費在外研究員）

    2003.06 - 2003.07

  • ノルウェー国立作物研究所客員研究員(学術振興会科研費在外研究員）

    2002.07 - 2002.08

  • ノルウェー国立作物研究所共同研究員(学術振興会科研費在外研究員）

    2001.06 - 2001.07

  • チリ共和国南極基地客員研究員（日本国立極地研究所外国共同観測隊員）

    2000.12 - 2001.02

  • ノルウェー国立作物研究所客員研究員（ユーグレナ研究会在外研究員）

    2000.03 - 2000.06

  • ノルウェー国立作物研究所客員研究員（大阪府在外研究員）

    1999.07 - 1999.10

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Papers

  • Relationship between Vapor Pressure Deficit Condition and Water-stress Status in Strawberry

    Yamanaka Ryosuke, Yano Takayoshi, Hikawa-Endo Minori, Yoshikoshi Hisashi, Kawashima Hiroki, Tojo Motoaki, Wada Teruo

    The Horticulture Journal   94 ( 1 )   73 - 80   2025（ ISSN:21890102 ） （ eISSN:21890110 ）

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    <p>To develop a novel highly robust humidification technology that requires minimal adjustment of operational methods, we investigated the vapor pressure deficit (VPD) conditions that cause water stress in strawberry (<i>Fragaria</i> × <i>ananassa</i> Duch.) plants. The relationship between the rate of relative change in fruit-stalk diameter (RCFSD<sub>t</sub>) and VPD conditions, including VPD and rate of change in VPD (VPD′; hPa·min<sup>−1</sup>) were analyzed by performing multiple regression. A negative RCFSD<sub>t</sub> was defined as an indicator that the plant was experiencing water stress. Regression of RCFSD<sub>t</sub> on VPD and VPD′ revealed that VPD′ greater than 0.069 hPa·min<sup>−1</sup> led to negative RCFSD<sub>t</sub> when VPD was 8.0 hPa or higher. In addition, we investigated whether the rate of change in VPD′ (VPD″; hPa ·min<sup>−2</sup>) could be used as an indicator to cease humidification, employing both VPD and VPD′. Analysis of the relationship between RCFSD<sub>t</sub> and VPD″ revealed that even if VPD and VPD′ exceeded 8.0 hPa and 0.069 hPa·min<sup>−1</sup>, respectively, RCFSD<sub>t</sub> could not be negative when VPD″ was less than −0.00426 hPa·min<sup>−2</sup>. We measured the relative change in fruit-stalk diameter (CFSD<sub>t</sub>) of strawberry under the conditions generated by a novel humidification system. The novel humidification system humidified the air when VPD, VPD′, and VPD″ exceeded each threshold for avoiding the condition, where VPD, VPD′, and VPD″ exceeded 8.0 hPa, 0.069 hPa·min<sup>−1</sup>, and −0.00426 hPa·min<sup>−2</sup>, respectively. In practice, there were periods when humidification control was not executed because while VPD exceeded its control threshold, VPD′ and VPD″ were below their respective control thresholds. In addition, the novel humidification system prevented a decrease in CFSD<sub>t</sub> during the daytime under the non-humidification treatment.</p>

    DOI： 10.2503/hortj.szd-015

  • Effects of the red light/far-red light ratio on plant shape, fruit yield, and fruit quality in Fragaria × ananassa Duch. ‘Beni hoppe’

    Yamanaka R.

    Acta Horticulturae   3 ( 1404 )   241 - 246   2024.09（ ISSN:05677572 ）

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  • Effects of environmental conditions for inducing flower bud initiation on plant growth and flowering of June-bearing strawberry grown under LED lighting

    Wada T.

    Acta Horticulturae   3 ( 1404 )   1221 - 1228   2024.09（ ISSN:05677572 ）

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  • Sensitivity of Globisporangium ultimum to the fungicide metalaxyl is enhanced by the infection with a toti-like mycovirus

    Aika Higuchi, Motoaki Tojo, Tomofumi Mochizuki

    Microbiological Research   285   127742   2024.05（ ISSN:0944-5013 ）

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    Publishing type：Research paper (scientific journal)  

    DOI： 10.1016/j.micres.2024.127742

    PubMed

  • First report of cucumber damping-off caused by Globisporangium ultimum var. ultimum in Japan

    Keo S.

    New Disease Reports   49 ( 2 )   2024.04

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  • Suppressive effects of low-pH solutions on root rot in hydroponically grown Welsh onion

    Sachiko Shimizu, Motoaki Tojo

    Journal of General Plant Pathology   90 ( 3 )   151 - 162   2024.01（ ISSN:1345-2630 ） （ eISSN:1610-739X ）

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    Publishing type：Research paper (scientific journal)  

    DOI： 10.1007/s10327-024-01168-2

    Other URL： https://link.springer.com/article/10.1007/s10327-024-01168-2/fulltext.html

  • First report of Aphanomyces cochlioides causing damping off of quinoa

    Kawasumi R.

    Journal of General Plant Pathology   2024（ ISSN:13452630 ）

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  • Effects of Humidification Based on Vapor Pressure Deficit (VPD) on Plant Growth, Fruit Yield, and Fruit Quality Traits in June-bearing Strawberry

    Yamanaka Ryosuke, Yano Takayoshi, Hikawa-Endo Minori, Yoshikoshi Hisashi, Kawashima Hiroki, Tojo Motoaki, Wada Teruo

    The Horticulture Journal   93 ( 4 )   377 - 388   2024（ ISSN:21890102 ） （ eISSN:21890110 ）

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    <p>To develop novel humidification technology for strawberry production to achieve higher yields and improve fruit quality, four Japanese June-bearing strawberry cultivars were grown in a greenhouse with or without humidification treatment (HT) based on vapor pressure deficit (VPD). HT reduced <i>VPD</i> from transplanting to March, but did not affect the VPD condition from April to May. Soon after transplanting, HT enhanced plant growth and the daily leaf-emergence rate, and significantly advanced flower-bud emergence and first-fruit harvest for the first inflorescence for ‘Koiminori’, ‘Kaorino’, and ‘Saga i9’. However, HT significantly delayed flower-bud differentiation and first-fruit harvest of the second inflorescence of ‘Kaorino’ and ‘Yumenoka’. HT significantly increased the total weight of marketable fruit for ‘Koiminori’, ‘Kaorino’, and ‘Saga i9’. In addition, HT significantly increased the total fresh weight of marketable fruit harvested until December for ‘Koiminori’ and ‘Saga i9’. HT did not significantly affect the firmness of fruit skin (FFS), soluble-solid content (SSC), fruit acidity (FA), or SSC/acidity of ‘Koiminori’, ‘Kaorino’, and ‘Yumenoka’.</p>

    DOI： 10.2503/hortj.qh-114

  • Hydrangea diseases in Japan Reviewed

    Nagashima Susumu, Tojo Motoaki

    JARQ   57 ( 3 )   183 - 194   2023.06

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    Authorship：Corresponding author   Publishing type：Research paper (scientific journal)  

  • An ecological network approach for detecting and validating influential organisms for rice growth

    Ushio M.

    eLife   12   2023

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  • Effects of Air Temperature and Vapor Pressure Deficit on Fruit Growth of June-bearing Strawberry in a Controlled Environment with Artificial Lighting

    YAMANAKA Ryosuke, WADA Teruo, FURUKAWA Hajime, TOJO Motoaki, HIRAI Norio, KITAYA Yoshiaki

    Transactions of the Japan Society of Refrigerating and Air Conditioning Engineers   39 ( 3 )   167   2022.09（ ISSN:13444905 ） （ eISSN:2185789X ）

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    <p>The aim of this study was to determine the responses of strawberry fruit growth to environmental factors in a plant factory with artificial lighting (PFAL). June-bearing strawberry ‘Beni hoppe’ was grown in a growth chamber under a 12-h light/12-h dark photoperiod. Three temperature treatments were applied: 1) temperature decrease from 20°C to 10°C (decreased by 5°C every 4 h during the dark period); 2) temperature increase from 15°C to 25°C (increased by 5°C every 4 h during the light period); and 3) temperature decrease from 25°C to 15°C (decreased by 5°C every 4 h during the light period). The fruit diameter was measured using a contact-type digital displacement sensor and the relative rate of change in the fruit volume (<i>R</i>-<i>RCFVt</i>) was calculated as the fruit growth rate. The <i>R</i>-<i>RCFVt</i> temporarily increased or decreased in response to the rapid change in vapor pressure deficit (VPD) when the air temperature switched to a lower or higher setpoint. The <i>R</i>-<i>RCFVt</i> remained almost constant when the air temperature and VPD were kept constant. Regression analyses indicated that <i>R</i>-<i>RCFVt</i> was positively correlated with the air temperature in both dark and light periods.</p>

    DOI： 10.11322/tjsrae.22-06

  • Association of Two Unknown Pythium spp. without Forming Sexual Structures on Root Rot of Hydroponically Grown Welsh onion Reviewed

    S. Shimizu, M. Tojo

    Asian Research Journal of Agriculture   86 - 91   2022.08（ eISSN:2456-561X ）

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    Publishing type：Research paper (scientific journal)   International / domestic magazine：International journal  

    Aims: Aim of this study was to elucidate association of Pythium isolates without forming sexual structures on root rot of hydroponically grown Welsh onion, as well as to clarify their taxonomic positions.
    Place and Duration of Study: Commercial hydroponic greenhouses in Hiroshima Prefecture, Hiroshima Prefectural Technology Research Institute, and Osaka Metropolitan University, between March 2020 and March 2021.
    Methodology: Total 2,966 isolates of Pythium-like organs were isolated from the plant roots during the survey period. All the isolates didn’t form any sexual organs, and were separated into three groups based on colony patterns on agar media such as cornmeal agar. Among of them, 236 isolates were equally selected from each three groups. Since two of the three groups were thought to be first records on Welsh onion, 17 representative isolates from the two groups were examined on morphology, hyphal growth response to temperatures and sequences of the ribosomal internal transcribed spacer (ITS) regions and mitochondrial COI. Inoculation tests were performed on Welsh onion seedlings under a hydroponic condition by using one representative isolate from each group.
    Results: The three groups were identified as Pythium Cluster B2a sp., B1d sp. and Clade A sp. on sequences of ITS and COI, respectively. Pythium isolates belonged to Pythium Cluster B1d and Clade A showed similar morphology and hyphal growth response to temperatures each other. Inoculation tests confirmed that both representative isolates from two groups cause roots rot of hydroponically grown Welsh onion 14 days after their inoculation. Pythium Cluster B1d showed stronger pathogenicity than Pythium Clade A.
    Conclusion: The present study firstly demonstrated that Pythium Cluster B1d sp. and Clade A sp. which don’t form any sexual structures associate root rot of hydroponically grown Welsh onion.

    DOI： 10.9734/arja/2022/v15i430170

    Other URL： https://journalarja.com/index.php/ARJA/article/download/30170/56615

  • First report of Pythium myriotylum damping-off of shiso Reviewed

    Ruka Kawasumi, Yuta Oda, Motoaki Tojo

    Journal of General Plant Pathology   88 ( 4 )   275 - 277   2022.07

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    Publishing type：Research paper (scientific journal)   International / domestic magazine：International journal  

    DOI： 10.1007/s10327-022-01067-4

    Other URL： https://link.springer.com/article/10.1007/s10327-022-01067-4/fulltext.html

  • Taxonomic revision of the Typhula ishikariensis complex Reviewed

    Tamotsu Hoshino, Oleg B. Tkachenko, Motoaki Tojo, Anne Marte Tronsmo, Taiga Kasuya, Naoyuki Matsumoto

    Mycoscience   63 ( 3 )   118 - 130   2022.05

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    Publishing type：Research paper (scientific journal)  

    DOI： 10.47371/mycosci.2022.03.003

  • Novel fusari-and toti-like viruses, with probable different origins, in the plant pathogenic oomycete globisporangium ultimum

    Miki Fukunishi, Shinsaku Sasai, Motoaki Tojo, Tomofumi Mochizuki

    Viruses   13 ( 10 )   2021.10（ eISSN:1999-4915 ）

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    Publishing type：Research paper (scientific journal)  

    To further classify the oomycete viruses that have been discovered in recent years, we investigated virus infection in the plant-parasitic oomycete Globisporangium ultimum in Japan. Dou-ble-stranded RNA detection, high-throughput sequencing, and RT-PCR revealed that the G. ulti-mum isolate UOP226 contained two viruses related to fusarivirus and totivirus, named Pythium ultimum RNA virus 1 (PuRV1) and Pythium ultimum RNA virus 2 (PuRV2), respectively. Phylogenetic analysis of the deduced amino acid sequence of the RNA-dependent RNA polymerase (RdRp) showed that fusari-like PuRV1 belonged to a different phylogenetic group than Plasmopara viticola lesion-associated fusari virus (PvlaFV) 1–3 from oomycete Plasmopara viticola. Codon usage bias of the PuRV1 RdRp gene was more similar to those of fungi than Globisporangium and Phytophthora, suggesting that the PuRV1 ancestor horizontally transmitted to G. ultimum ancestor from fungi. Phylogenetic analysis of the deduced amino acid sequence of the RdRp of toti-like PuRV2 showed a monophyletic group with the other toti-like oomycete viruses from Globisporangium, Phytophthora, and Pl. viticola. However, the nucleotide sequences of toti-like oomycete viruses were not so homolo-gous, suggesting the possibility of convergent evolution of toti-like oomycete viruses.

    DOI： 10.3390/v13101931

    PubMed

  • Identification and Isolation Pattern of Globisporangium spp. from a Sanionia Moss Colony in Ny-Ålesund, Spitsbergen Is., Norway from 2006 to 2018

    Motoaki Tojo, Natsumi Fujii, Hironori Yagi, Yuki Yamashita, Katsuyuki Tokura, Kenichi Kida, Akiho Hakoda, María-Luz Herrero, Tamotsu Hoshino, Masaki Uchida

    Microorganisms   9 ( 9 )   1912 - 1912   2021.09（ eISSN:2076-2607 ）

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    Publishing type：Research paper (scientific journal)  

    Globisporangium spp. are soil-inhabiting oomycetes distributed worldwide, including in polar regions. Some species of the genus are known as important plant pathogens. This study aimed to clarify the species construction of Globisporangium spp. and their long-term isolation pattern in Sanionia moss in Ny-Ålesund, Spitsbergen Is., Norway. Globisporangium spp. were isolated at two-year intervals between 2006 and 2018 at a Sanionia moss colony, Ny-Ålesund, Spitsbergen Is., Norway. The isolates were obtained by using three agar media and were identified based on sequences of the rDNA-ITS region and cultural characteristics. Most of the Globisporangium isolates obtained during the survey were identified into six species. All six species were grown at 0 °C on an agar plate and used to infect Sanionia moss at 4 and/or 10 °C under an in vitro inoculation test. The total isolation frequency of Globisporangium gradually decreased throughout the survey period. The isolation frequency varied among the six species, and four of the species that showed a high frequency in 2006 were rarely isolated after 2016. The results suggested that Globisporangium inhabiting Sanionia moss in Ny-Ålesund has a unique composition of species and that most of the species reduced their population over the recent decade.

    DOI： 10.3390/microorganisms9091912

  • Viruses, with Probable Different Origins, in the Plant Pathogenic Oomycete Globisporangium ultimum. Reviewed

    Fukunishi, M.; Sasai, S.; Tojo, M.; Mochizuki, T.

    Viruses 雑誌   13 ( 10 )   2021.09

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    Kind of work：Joint Work  

  • Identification and Isolation Pattern of Globisporangium spp. from a Sanionia Moss Colony in Ny-Ålesund, Spitsbergen Is., Norway from 2006 to 2018 Reviewed OA

    1) Tojo, M.; Fujii, N.; Yagi, H.,Yamashita, Y.; Tokura, K.; Kida, K., Hakoda, A.; Herrero, M.-L.; Hoshino,T.; Uchida, M.

    Microorganisms 雑誌   9 ( 9 )   2021.09

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    Kind of work：Joint Work  

    Repository URL： http://hdl.handle.net/10466/00017547

  • First Report of Pythium Cluster B2a Species Causing Root Rot in Welsh Onion Reviewed

    Shimizu, S. and Tojo, M.

    Plant Disease 雑誌   2021.07

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    Kind of work：Joint Work  

  • Stem and root rot in hydrangea caused by Pythium myriotylum and Globisporangium spp. and susceptibility of hydrangea cultivars

    Susumu Nagashima, Xiaodong You, Shihomi Uzuhashi, Motoaki Tojo

    Journal of General Plant Pathology   87 ( 3 )   148 - 153   2021.05（ ISSN:1345-2630 ） （ eISSN:1610-739X ）

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    Publishing type：Research paper (scientific journal)  

    Severe stem and root rot was found on potted common hydrangeas (Hydrangea macrophylla) in commercial greenhouses in Shimane Prefecture, Japan. Pythium and Globisporangium spp. that were consistently isolated from the plants were identified as Pythium myriotylum, Globisporangium splendens, G. spinosum, and an undescribed species of Globisporangium based on morphological analysis and rDNA-internal transcribed spacer and cox1 gene sequences. All four species reproduced stem and root rot on inoculated potted hydrangea. Plant cultivars significantly differed in their susceptibility to the pathogens. The cultivar Mangekyo was the most susceptible to all the pathogens.

    DOI： 10.1007/s10327-021-00989-9

  • Note on a snow mold and a fungus-like microbe from Kuujjuarapik-Whapmagoostui, Quebec, subarctic Canada

    Hoshino T, Nakagawa T, Yajima Y, Uchida M, Tojo M

    Polar Science 雑誌   27   2021.03

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    Kind of work：Joint Work  

  • Stem and root rot in hydrangea caused by Pythium myriotylum and Globisporangium spp. and susceptibility of hydrangea cultivars Reviewed

    Nagashima, S., You, X., Uzuhashi, S., Tojo M.

    Journal of General Plant Pathology 雑誌   2021.03

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    Kind of work：Joint Work  

  • Response of Arctic biodiversity and ecosystem to environmental changes: Findings from the ArCS project

    Toru Hirawake, Masaki Uchida, Hiroto Abe, Irene D. Alabia, Tamotsu Hoshino, Shota Masumoto, Akira Mori, Jun Nishioka, Bungo Nishizawa, Atsushi Ooki, Akinori Takahashi, Yukiko Tanabe, Motoaki Tojo, Masaharu Tsuji, Hiromichi Ueno, Hisatomo Waga, Yuuki Watanabe, Atsushi Yamaguchi, Youhei Yamashita

    Polar Science 雑誌   27   2021.03

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    Kind of work：Joint Work  

  • Note on a snow mold and a fungus-like microbe from Kuujjuarapik-Whapmagoostui, Quebec, subarctic Canada

    Tamotsu Hoshino, Takuya Nakagawa, Yuka Yajima, Masaki Uchida, Motoaki Tojo

    Polar Science   27   2021.03（ ISSN:1873-9652 ）

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    Publishing type：Research paper (scientific journal)  

    An isolate of a novel fungus and an isolate of a novel fungus-like microbe were obtained during field research conducted in Kuujjuarapik-Whapmagoostui, Quebec, in subarctic Canada, located on the southeastern coast of Hudson Bay, from August to September 2016. The isolates were identified as a Typhula sp. and Globisporangium sp. (syn. Pythium sp.), respectively. Mycelia with clamps connections were isolated from small sclerotia (0.2–0.7 × 0.5–1.2 mm in size) collected from dead leaves of sea pea (Lathyrus japonicus) on the banks of the Great Whale River in Kuujjuarapik-Whapmagoostui. The isolate was found to be closely related with T. japonica based on sclerotium morphology and hyphal growth under different temperatures. The Globisporangium sp. isolate was found to be most closely related to G. okanoganense based on phylogenetic analyses using rDNAITS. G. okanoganense is known as an important pathogen causing snow rot on wheat and other winter crops. Further investigation is needed to determine whether the novel fungus and fungus-like microbe found in Kuujjuarapik-Whapmagoostui are phytopathogenic like the snow rot pathogens to which they are closely related.

    DOI： 10.1016/j.polar.2020.100559

  • Response of Arctic biodiversity and ecosystem to environmental changes: Findings from the ArCS project

    Toru Hirawake, Masaki Uchida, Hiroto Abe, Irene D. Alabia, Tamotsu Hoshino, Shota Masumoto, Akira S. Mori, Jun Nishioka, Bungo Nishizawa, Atsushi Ooki, Akinori Takahashi, Yukiko Tanabe, Motoaki Tojo, Masaharu Tsuji, Hiromichi Ueno, Hisatomo Waga, Yuuki Y. Watanabe, Atsushi Yamaguchi, Youhei Yamashita

    Polar Science   27   2021.03（ ISSN:1873-9652 ）

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    Publishing type：Research paper (scientific journal)  

    Arctic ecosystems are altered profoundly by climate changes. However, the responses of Arctic marine and terrestrial ecosystems as well as their biodiversity to global warming remain largely unknown. This article provides comprehensive insights into the results and major findings from the Arctic Challenge for Sustainability (ArCS) Project – an Arctic region research program initiated in Japan, which aims to address and advance our understanding of these uncertainties. Marine ecosystem studies have identified several biogeochemical processes that are associated with sea ice decline and northward transport and shift of marine species across multiple trophic levels over the Bering and Chukchi Sea shelves. Studies of the terrestrial ecosystem have identified factors that are important for the understanding of terrestrial biodiversity and ecosystems, including Arctic lakes, under the presence of global warming. Novel fungal species from the Arctic terrestrial ecosystem have also been isolated and described. Overall, these results could contribute to the conservation and sustainable management of the Arctic ecosystem services.

    DOI： 10.1016/j.polar.2020.100533

  • Increased snow and cold season temperatures alter High Arctic parasitic fungi-host plant interactions

    7) Moriana Armendariz, Mikel; Abbandonato, Holly; Yamaguchi, Takahiro; Mörsdorf, Martin A; Aares, Karoline; Semenchuk, Philipp; Tojo, Motoaki; Cooper, Elisabeth

    Arctic Science 雑誌   2021.02

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    Kind of work：Joint Work  

  • モウソウチク由来ミミズ堆肥中の土壌微生物と植物病害発病抑制効果 Reviewed

    尤 暁東, 東條元昭

    土と微生物 雑誌   74   50 - 53   2021.01

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    Kind of work：Single Work  

  • 温暖化が進行する北極域での土壌糸状菌の種類と動態． Reviewed

    東條元昭

    土と微生物 雑誌   74   60 - 65   2021.01

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    Kind of work：Single Work  

  • Chemical and Microbiological Evaluation of Vermicompost Made from School Food Waste in Japan

    Shumpei Hashimoto, Mai Furuya, Xiaodong You, Genki Wanibuchi, Hayato Tokumoto, Motoaki Tojo, Kumpei Shiragaki

    Japan Agricultural Research Quarterly   55 ( 3 )   225 - 232   2021（ ISSN:0021-3551 ）

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    Publishing type：Research paper (scientific journal)  

    Vermicomposting technology is an environmentally friendly, sustainable, and low-cost tool used to convert agronomical and food waste into manure, facilitated by the decomposition and digestion by earthworms. In this study, we evaluated the chemical properties and microbial diversity of vermicompost (VC) derived from school lunch waste, which has long been a serious problem in many countries including Japan. The results revealed that 18-week-old VC promoted the root elongation of plants, and also showed a higher germination index (GI) and higher cation exchange capacity (CEC), indicating that vermicompost made from school food waste is an acceptable manure. As a result of the microbiome analysis by the sequencing of 16S ribosomal DNA (rDNA) using next generation sequencing (NGS), higher ratios of Bacillus, Pseudomonas, and Paenibacillus species, which may include beneficial bacteria for plant growth, were detected in VC than in the control compost (CC). These results demonstrate the significance of vermicompost in utilizing waste from school lunch, suggesting the possibility of implementing a waste recycling system that leads to reducing and recycling food waste in schools

    DOI： 10.6090/jarq.55.225

  • Chemical genetic approach using beta-rubromycin reveals that a RIO kinase-like protein is involved in morphological development in Phytophthora infestans Reviewed

    Shuji Tani, Naotaka Nishio, Kenji Kai, Daisuke Hagiwara, Yoshiyuki Ogata, Motoaki Tojo, Jun-ichi Sumitani, Howard S. Judelson and Takashi Kawaguchi

    Scientifc Reports 雑誌   2020.12

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    Kind of work：Joint Work  

  • Chemical genetic approach using β-rubromycin reveals that a RIO kinase-like protein is involved in morphological development in Phytophthora infestans

    Shuji Tani, Naotaka Nishio, Kenji Kai, Daisuke Hagiwara, Yoshiyuki Ogata, Motoaki Tojo, Jun ichi Sumitani, Howard S. Judelson, Takashi Kawaguchi

    Scientific Reports   10 ( 1 )   2020.12（ eISSN:2045-2322 ）

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    Publishing type：Research paper (scientific journal)  

    To characterize the molecular mechanisms underlying life-stage transitions in Phytophthora infestans, we initiated a chemical genetics approach by screening for a stage-specific inhibitor of morphological development from microbial culture extracts prepared mostly from actinomycetes from soil in Japan. Of the more than 700 extracts, one consistently inhibited Ph. infestans cyst germination. Purification and identification of the active compound by ESI–MS, 1H-NMR, and 13C-NMR identified β-rubromycin as the inhibitor of cyst germination (IC50 = 19.8 μg/L); β-rubromycin did not inhibit growth on rye media, sporangium formation, zoospore release, cyst formation, or appressorium formation in Ph. infestans. Further analyses revealed that β-rubromycin inhibited the germination of cysts and oospores in Pythium aphanidermatum. A chemical genetic approach revealed that β-rubromycin stimulated the expression of RIO kinase-like gene (PITG_04584) by 60-fold in Ph. infestans. Genetic analyses revealed that PITG_04584, which lacks close non-oomycete relatives, was involved in zoosporogenesis, cyst germination, and appressorium formation in Ph. infestans. These data imply that further functional analyses of PITG_04584 may contribute to new methods to suppress diseases caused by oomycetes.

    DOI： 10.1038/s41598-020-79326-7

    PubMed

  • Chemical and microbiological evaluation of vermicompost made from school food waste in Japan

    Hashimoto Shumpei, Furuya Mai, You Xiaodong, Wanibuchi Genki, Tokumoto Hayato, Tojo Motoaki and Shiragaki Kumpei

    Japan Agricultural Research Quarterly 雑誌   2020.09

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    Kind of work：Joint Work  

  • Analysis of the Property of Fruit Growth and the Evaluation of Sugar Flux through a Cut Section of Fruit Stalk in Strawberry Grown under an Artificial Light Reviewed

    37 ( 3 )   215 - 224   2020.09（ ISSN:1344-4905 ）

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  • Morphological and molecular identification of Pythium aphanidermatum isolates from a root-rotted hydroponic spinach culture in Hiroshima Prefecture.

    Shimizu S, Uzuhashi S, Nishimura S, Mise R, Shinozaki T, Tojo M

    Annual Report of The Kansai Plant Protection Society   2020.05

  • Temperature dependency of Pythium and Globisporangium spp. in causing soybean damping-off in Japan.

    You XD, Tojo M

    Annual Report of The Kansai Plant Protection Society   2020

  • Note on a snow mold and a fungus-like microbe from Kuujjuarapik-Whapmagoostui, Quebec, subarctic Canada.

    Hoshino T, Nakagawa T, Yajima Y, Uchida M, Tojo M

    Polar Science   2020

  • Morphological and molecular identification of Pythium aphanidermatum isolates from a root-rotted hydroponic spinach culture in Hiroshima Prefecture Reviewed

    Sachiko Shimizu, Shihomi Uzuhashi, Sachika Nishimura, Ryota Mise, Tomoko Shinozaki, Motoaki Tojo

    Annual Report of The Kansai Plant Protection Society   62 ( 0 )   137 - 139   2020（ ISSN:0387-1002 ）

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    <p>Isolates of <i>Pythium aphanidermatum</i> from the rotted roots of spinach grown in hydroponic culture in the Hiroshima Prefecture, Japan, were characterized based on morphology, hyphal growth temperature, and internal transcribed spacer (ITS)-rDNA sequences.</p>

    DOI： 10.4165/kapps.62.137

    CiNii Article

  • Antifungal compounds isolated from bamboo vermicompost inhibit Rhizoctonia solani AG1-IB Reviewed

    Xiaodong You, Daigo Wakana, Kazuki Ishikawa, Tomoo Hosoe, Motoaki Tojo

    Advances in Microbiology 雑誌   2019.12

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    Kind of work：Joint Work  

  • A novel toti-like virus from a plant pathogenic oomycete Globisporangium splendens

    Kazuki SHIBA, Chiraru HATTA, Motoaki TOJO, Satoshi T OHKI, Tomofumi MOCHIZUKI

    Virology   2019.11

  • A novel toti-like virus from a plant pathogenic oomycete Globisporangium splendens

    Kazuki Shiba, Chiharu Hatta, Shinsaku Sasai, Motoaki Tojo, Satoshi T. Ohki, Tomofumi Mochizuki

    Virology   537   165 - 171   2019.11（ ISSN:0042-6822 ） （ eISSN:1096-0341 ）

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    Publishing type：Research paper (scientific journal)  

    We investigated virus infection in the plant pathogenic oomycete Globisporangium splendens, formerly classified as Pythium splendens, in Japan. From 12 strains investigated, three strains contained virus-like double-stranded (dsRNA). Next-generation sequencing revealed that the G. splendens strain MAFF 425508 and MAFF 305867 contained a virus related to toti-like viruses, that we named Pythium splendens RNA virus 1 (PsRV1). PsRV1 has a ca. 5700 nt-length genome encoding two overlapping open reading frames (ORFs). The ORF2 encodes an RNA-dependent RNA polymerase (RdRp). Phylogenetic analysis with deduced RdRp amino acid sequences indicated that PsRV1 was closely related to Pythium polare RNA virus 1 (PpRV1) from G. polare infecting mosses in the Arctic. PsRV1 was vertically transmitted through the hyphal swellings, vegetative organs of G. splendens, in a temperature-dependent manner. Also, we showed that PsRV1 infected in a symptomless manner.

    DOI： 10.1016/j.virol.2019.08.025

    PubMed

  • Suppressive effects of Pythium oligandrum on soybean damping off caused by P. aphanidermatum and P. myriotylum Reviewed

    Xiaodong You, Joffory Barraud, Motoaki Tojo

    Proceedings of the Kansai Plant Protection Society   61   9 - 13   2019.09

  • First Report of Pythium irregulare Causing Damping-Off on Soybean in Japan Reviewed

    You X. D., Zhao H., Tojo M.

    Plant Disease 雑誌   2019.08

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    Kind of work：Joint Work  

  • First Report of Pythium irregulare Causing Damping-Off on Soybean in Japan

    X. D. You, H. Zhao, M. Tojo

    Plant Disease   103 ( 10 )   2019.08（ ISSN:0191-2917 ） （ eISSN:1943-7692 ）

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    Publishing type：Research paper (scientific journal)  

    DOI： 10.1094/PDIS-12-18-2247-PDN

  • Presence of two species-level groups in Globisporangium splendens isolates in Japan

    Shihomi Uzuhashi, Haruka Ikeda, Ai Kamekawa, Lorien E. Radmer, Sakura Kobayashi-Yamazaki, Katsutoshi Kuroda, Taichi Funakubo, Kazunori Ichikawa, Motoaki Tojo

    European Journal of Plant Pathology   154 ( 3 )   751 - 766   2019.07（ ISSN:0929-1873 ） （ eISSN:1573-8469 ）

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    Publishing type：Research paper (scientific journal)  

    Globisporangium splendens, formerly classified as Pythium splendens, is one of the most common pathogenic oomycetes on ornamental plants, but this species has not been widely characterized in terms of its intraspecific variations in molecular phylogeny and virulence. In this study, G. splendens isolates from seven Prefectures in Japan were characterized for their morphology, mating compatibility, and molecular phylogeny, based on the internal transcribed spacer sequences of ribosomal RNA gene and mitochondrial cytochrome oxidase 1 and 2 gene sequences. We also examined the virulence of isolates on Pelargonium and papaya, which are known to be host plants of G. splendens. All G. splendens isolates had similar morphology and optimal growth temperatures. Mating compatibility tests revealed that all G. splendens isolates from Okinawa and Kagoshima Pref. were antheridial isolates, whereas all isolates from the other locations were oogonial isolates. The virulence on Pelargonium and papaya differed significantly among the isolates. Phylogenetic analyses based on the sequences of the three genes showed that G. splendens isolates were separated into two phylogenetic groups. Our study indicated that molecular intraspecific variation in G. splendens is considered to be species-level variation, which widely distributed in Japan, and it had no correlation with morphology or virulence on host plants.

    DOI： 10.1007/s10658-019-01699-x

  • 植物防疫講座　病害編-19 ピシウム菌による病害の発生生態と防除

    東條元昭

    植物防疫 雑誌   73   448 - 452   2019.07

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    Kind of work：Single Work  

  • Phylogeny and morphology of new species of Globisporangium Reviewed

    Uzuhashi1 S., Nakagawa S, Abdelzaher H.M.A., Tojo M.

    Fungal Systematics and Evolution 雑誌   3   2019.06

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    Kind of work：Joint Work  

  • Phylogeny and morphology of new species of Globisporangium

    S. Uzuhashi, S. Nakagawa, H. M.A. Abdelzaher, M. Tojo

    Fungal Systematics and Evolution   3   13 - 18   2019.06（ ISSN:2589-3823 ） （ eISSN:2589-3831 ）

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    Publishing type：Research paper (scientific journal)  

    An isolate originally obtained from pond water in Osaka in 1992 and identified as Pythium marsipium, was subsequently classified as Globisporangium marsipium. According to molecular phylogenetic analyses based on the internal transcribed spacer regions of the nuclear ribosomal RNA and mitochondrial cytochrome c oxidase subunit 1 genes, this isolate was shown to represent a new species, described here as G. lacustre sp. nov. In addition, two further new combinations are introduced in Globisporangium as G. camurandrum and G. takayamanum based on their DNA phylogeny.

    DOI： 10.3114/fuse.2019.03.02

  • Presence of two species-level groups in Globisporangium splendens isolates in Japan. Europian Journal of Plant Pathology Reviewed

    Uzuhashi S., Ikeda H., Kamekawa A, Radmer L. E., Kuroda K., Funakubo T., Ichikawa K., Tojo M.

    Europian Journal of Plant Pathology 雑誌   154   2019.03

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    Kind of work：Joint Work  

  • Antimicrobial agent isolated from Coptidis rhizome extract incubated with Rhodococcus sp. strain BD7100

    Kazuki Ishikawa, Kazunori Takahashi, Syun Hosoi, Hisashi Takeda, Hinaka Yoshida, Daigo Wakana, Masayoshi Tsubuki, Fumihiko Sato, Motoaki Tojo, Tomoo Hosoe

    Journal of Antibiotics   72 ( 2 )   71 - 78   2019.02（ ISSN:0021-8820 ） （ eISSN:1881-1469 ）

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    Publishing type：Research paper (scientific journal)  

    Coptidis rhizome (CR) is a widely used herbal medicine that contains protoberberine-type alkaloids. CR extract exhibits various pharmacologic activities. A previous study reported the isolation of Rhodococcus sp. strain BD7100 as a berberine (BBR)-utilizing bacterium, and the BBR-degradation pathway has been investigated. When we incubated strain BD7100 cells with CR extract, the number of viable cells declined with the degradation of components in the CR extract, and the culture broth exhibited antibacterial activity against strain BD7100. These results suggest that CR extract cultured in the presence of strain BD7100 contains one or more antibacterial agents. In this study, we isolated coptirhoquinone A (1) from CR extract incubated with strain BD7100 in Luria–Bertani (LB) medium, and the structure was elucidated using NMR and MS analysis. We also report the total synthesis and antimicrobial activities of 1 against bacteria, fungi, and Pythium sp.

    DOI： 10.1038/s41429-018-0114-3

    PubMed

  • Rhodococcus sp.株BD7100と共に培養したCoptidis rhizomeエキスから単離した抗菌性物質(Antimicrobial agent isolated from Coptidis rhizome extract incubated with Rhodococcus sp. strain BD7100)

    Ishikawa Kazuki, Takahashi Kazunori, Hosoi Syun, Takeda Hisashi, Yoshida Hinaka, Wakana Daigo, Tsubuki Masayoshi, Sato Fumihiko, Tojo Motoaki, Hosoe Tomoo

    The Journal of Antibiotics   72 ( 2 )   71 - 78   2019.02（ ISSN:0021-8820 ）

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    ベルベリン(BBR)資化性菌としてのRhodococcus sp.株BD7100によるBBR分解経路を検討した。BD7100株をCoptidis rhizome(CR)エキスと共にLuria-Bertani培地で培養すると、CRエキス内の成分が分解するのに伴って生存細胞数が減少し、培養ブロスはBD7100株に対して抗菌活性を示すようになった。これらの結果から、BD7100株の存在下で培養されたCRエキスには1種類以上の抗菌性物質が含まれていることが示唆された。培地からcoptirhoquinone A(I)を単離し、その構造をNMRスペクトル解析と質量分析法で同定した。Iを全合成して種々の細菌、真菌およびピシウム菌に対する抗菌活性を評価したところ、Iは黄色ブドウ球菌、Aspergillus fumigatus、Candida albicansなどの増殖を阻害した。

  • Suppressive effects of vermicomposted-bamboo powder on cucumber damping-off. Reviewed

    Xiaodong You, Naohiro Kimura, Teppei Okura, Shinpei Murakami, Ryoichi Okano, Yukihiro Shimogami, Atsushi Matsumura, Hayato Tokumoto, Yoshiyuki Ogata and Motoaki Tojo

    Japan Agricultural Research Quarterly 雑誌   53   13 - 18   2019.01

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    Kind of work：Joint Work  

  • Suppressive effects of vermicomposted-bamboo powder on cucumber damping-off Reviewed

    Xiaodong You, Naohiro Kimura, Teppei Okura, Shinpei Murakami, Ryoichi Okano, Yukihiro Shimogami, Atsushi Matsumura, Hayato Tokumoto, Yoshiyuki Ogata, Motoaki Tojo

    JARQ   53 ( 1 )   13 - 19   2019.01（ ISSN:0021-3551 ）

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    Publishing type：Research paper (scientific journal)  

    The suppressive effect of vermicomposted-bamboo powder (VB) derived from waste bamboo shoots on cucumber damping-off when VB is used as a nursery medium was characterized. A greenhouse inoculation experiment showed that the damping-off caused by each strain of Pythium aphanidermatum, P. ultimum var. ultimum, and Rhizoctonia solani AG1-IB was significantly reduced by VB compared to an autoclaved vermicomposted-bamboo powder (aVB) and a commercial-nursery medium (CNM). Due to the fact that the disease suppressiveness of VB was nulled by autoclaving, the soil biological factors were characterized with respect to those of the CNM by fluorescein diacetate (FDA) hydrolysis reactions, plate count techniques, and next-generation sequencing (NGS) analysis using prokaryotic universal primers. The FDA hydrolysis reaction and the plate count techniques showed that VB has a higher microbial activity and population density of fungi and bacteria than aVB and CNM. The NGS analysis revealed that the bacterial diversity was higher in VB than in aVB and CNM. In addition, the higher concentrations of NH4 + in VB may be related to the Pythium damping-off suppression. This is the first report on the suppressive effect of VB on the damping-off disease, which is at least partially due to its rich microbial activity and diversity.

    DOI： 10.6090/jarq.53.13

  • Saprolegnia maragheica. In: Fungal Systematics and Evolution Reviewed

    Chenari Bouket、Yoshikazu Tanaka、Shihomi Uzuhashi、Motoaki Tojo、Lassaad Belbahri

    Sydowia 雑誌   70   252 - 255   2018.12

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    Kind of work：Joint Work  

  • A novel non-segmented double-stranded RNA virus from an Arctic isolate of Pythium polare. Reviewed

    Shinsaku SASAI; Keisuke TAMURA; Motoaki TOJO, María-Luz HERRERO; Tamotsu HOSHINO; Satoshi T OHKI; Tomofumi MOCHIZUKI

    Virology 雑誌   552   234 - 243   2018.09

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    Kind of work：Joint Work  

  • Effects of vermicompost water extract prepared from bamboo and kudzu against Meloidogyne incognita and Rotylenchulus reniformis. Reviewed

    Xiaodong You, Motoaki Tojo, Shelby Ching, Koon-Hui Wang

    Journal of Nematology 雑誌   50   569 - 578   2018.09

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    Kind of work：Joint Work  

  • Antimicrobial agent isolated from Coptidis rhizome extract incubated with Rhodococcus sp. strain BD7100. Reviewed

    7) Kazuki Ishikawa, Kazunori Takahashi, Syun Hosoi, Hisashi Takeda, Hinaka Yoshida, Daigo Wakana, Masayoshi Tsubuki, Fumihiko Sato, Motoaki Tojo, Tomoo Hosoe

    The Journal of Antibiotics 雑誌   72   2018.09

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    Kind of work：Joint Work  

  • Genome sequence of a novel partitivirus identiied from the oomycete Pythium nunn

    10) Kazuki Shiba, Chiharu Hatta, Shinsaku Sasai, Motoaki Tojo, Satoshi T. Ohki, Tomofumi Mochizuki

    Archives of Virology 雑誌   163   2561 - 2563   2018.09

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    Kind of work：Joint Work  

  • ピシウムによるEPA生産の可能性

    永峰 賢、吉田 磨仁、松下 貴子、田中 淳和、松浦 昌平、東條 元昭

    New food industry 雑誌   60   7 - 14   2018.08

  • Occurrence pattern of the parasitic fungus Rhytisma polare (Ascomycota) on the polar willow (Salix polaris) under limited water conditions in a high-Arctic semi-desert

    12) Shota Masumoto, Motoaki Tojo, Satoshi Imura, Maria Luz Herrero, Masaki Uchida

    Polar Biology   41   2018.06

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    Kind of work：Joint Work  

  • The effect of tar spot pathogen on host plant carbon balance and its possible consequences on a tundra ecosystem. Reviewed

    Masumoto S, Uchida M, Tojo M, Herrero, ML, Mori A, Imura S

    Oecologia 雑誌   186   2018.03

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    Kind of work：Joint Work  

  • Weeds as the potential inoculum source of Colletotrichum fructicola responsible for strawberry anthracnose in Nara, Japan.

    Hirayama Y, Asano S, Okayama K, Ohki ST, Tojo M

    Journal of General Plant Pathology 雑誌   84   12 - 19   2018.01

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    Kind of work：Joint Work  

  • First report of soybean damping off caused by Pythium aphanidermatum and P. coloratum in Japan. Reviewed

    You X, Tojo M

    New Disease Reports 雑誌   36   2017.10

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    Kind of work：Joint Work  

  • Typhula cf. subvariabilis, new snow mold in Antarctica. Reviewed

    Yajima Yuka, Tojo Motoaki, Chen Bo, Hoshino Tamotsu

    Mycology: An International Journal of Fungal Biology 雑誌   8   147 - 152   2017.08

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    Kind of work：Joint Work  

  • Selective Media for Practical Isolations of Pythium spp. From Natural and Agricultural Environments

    Tojo M.

    Agri Res & Tech Open Access J 雑誌   7 ( 5 )   2017.06

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    Kind of work：Single Work  

  • Resistance levels of cucumber to Podosphaera xanthii in a growth chamber are related to haustorial formation and hyphal branching frequency. Reviewed

    Itagaki K, Sato Y, Tojo M

    Journal of General Plant Pathology 雑誌   83   2017.05

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    Kind of work：Joint Work  

  • Globisporangium oryzicola sp. nov., causing poor seedling establishment of directly seeded rice. Reviewed

    Uzuhashi S. Hata K. Matsuura S. Tojo M

    Antonie van Leeuwenhoek 雑誌   110   2017.03

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    Kind of work：Joint Work  

  • Morphological and molecular identification of newly recovered Pythium species, P. abappressorium and P. spinosum from Iran, and evaluation of their pathogenicity on cucumber seedlings. Reviewed

    Bouket AC, Arzanlou M, Babai-Ahari A, Tojo M

    Austrian Journal of Mycology 雑誌   25   39 - 50   2016.12

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    Kind of work：Joint Work  

  • Control of Colletotrichum fructicola on strawberry with a foliar spray of neutral electrolyzed water through an overhead irrigation system. Reviewed

    Hirayama Y, Asano S, Watanabe K, Sakamoto Y, Ozaki M, Okayama K, Ohki ST, Tojo M

    Journal of General Plant Pathology 雑誌   82   186 - 189   2016.07

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    Kind of work：Joint Work  

  • Early development of powdery mildew on cucumber leaves acclimatized to illumination with different red-to-far-red ratios.

    Itagaki K, Shibuya, T, Tojo M, Endo R, Kitaya Y

    HortScience 雑誌   51   2016.05

  • Isolation of growth inhibitors of the snow rot pathogen Pythium iwayamai from an arctic strain of Trichoderma polysporum.

    6) Kamo M, Tojo M, Yamazaki Y, Itabashi T, Takeda H, Wakana D, Hosoe T.

    Journal of Antibiotics 雑誌   2016.03

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    Kind of work：Joint Work  

  • Morphological and molecular characterization of Phytopythium litorale and Pp. oedochilum from Iran.

    Bouket AC, Arzanlou M, Babai-Ahari A, Tojo M

    Nova Hedwigia 雑誌   102   257 - 270   2016.03

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    Kind of work：Joint Work  

  • Pythium barbulae sp. nov. isolated from the moss, Barbula unguiculata; morphology, molecular phylogeny and pathogenicity. Reviewed

    Ueta S, Tojo M

    Mycoscience 雑誌   57   11 - 19   2016.01

  • First report of Pythium aphanidermatum causing root rot on common ice plant (Mesembryanthemum crystallinum). Reviewed

    You X.D., Park J.E., Takase M., Wada T., Tojo M

    New Disease Reports 雑誌   32   36 - 36   2015.12

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    Kind of work：Joint Work  

  • A practical method for forecasting strawberry anthracnose caused by Glomerella cingulata using an ethanol-spray treatment in Nara Prefecture, Japan. Reviewed

    Hirayama Y, Asano S, Kubota M, Tojo M, Ohki ST

    Annual Report of The Kansai Plant Protection Society 雑誌   57   25 - 29   2015.05

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    Kind of work：Joint Work  

  • Pythium kandovanense sp. nov., a fungus - like eukaryotic microorganism (Stramenopila, Pythiales) isolated from snow covered ryegrass leaves. Reviewed

    Bouket AC, Arzanlou M, Tojo M, Babai-Ahari A

    International Journal of Systematic and Evolutionary Microbiology 雑誌   65   2500 - 2506   2015.05

  • ベニバナインゲン「常陸大黒」に発生する土壌病害の総合防除に関する研究 Reviewed

    渡邊健, 青木一美, 本橋みゆき, 柴田夏美, 池田千亜紀, 東條元昭, 町田暢久, 櫻本直美, 横山和成

    茨城県病虫害研究会会報 雑誌 茨城県病虫害研究会   ( 54 )   1 - 44   2015.03

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    Kind of work：Joint Work  

  • Morphological and molecular characterization of Rhytisma filamentosum sp. nov. from Nagano Prefecture, Japan Reviewed

    Masumoto S, Tojo M, Uchida M, Imura S

    Mycological Progress 雑誌   14 ( 44 )   1 - 6   2015.03

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    Kind of work：Joint Work  

  • A web-based identification programme for Pythium species Reviewed

    Bouket AC, Arzanlou M, Tojo M, Babai-Ahari A

    Archives of Phytopathology and Plant Protection 雑誌   48   475 - 484   2015.03

  • Surviving freezing in plant tissues by oomycetous snow molds Reviewed

    Murakami, R., Yajima, Y., Kida, K., Tokura, K., Tojo, M., Hoshino, T.

    Cryobiology   70   208 - 210   2015.02

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    Kind of work：Joint Work  

  • Rhytisma polaris: Morphological and molecular characterization of a new species from Spitsbergen Island, Norway.

    Masumoto S, Tojo M, Uchida M, Imura S

    Mycological Progress 雑誌   13   181 - 188   2014.04

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    Kind of work：Joint Work  

  • Atmospheric moisture influences on conidia development in Podosphaera xanthii through host-plant morphological responses. Reviewed

    Itagaki K, Shibuya, T, Tojo M, Endo R, Kitaya Y

    European Journal of Plant Pathology 雑誌   138   2014.03

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    Kind of work：Joint Work  

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Books and Other Publications

  • 農学基礎シリーズ　植物病理学の基礎

    夏秋　啓子　他（ Role： Joint author）

    農山漁村文化協会  2021.02 

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    Responsible for pages：46-50頁  

  • 植物病理学 第2版

    眞山　滋志、土佐　幸雄　他（ Role： Joint author）

    文永堂出版  2020.03 

  • Oomycetes in Polar Regions

    Tojo M（ Role： Sole author）

    CRC Press  2019.04 

  • Snow Molds and their Antagonistic Microbes in Polar Regions

    Tamotsu Hoshino, Hisahiro Morita, Yuka Yajima, Masaharu Tsuji, Motoaki Tojo and Oleg B. Tkacehnko（ Role： Joint author）

    CRC Press  2019.04 

  • 日本植物病害大事典

    東條元昭（ Role： Sole author）

    全国農村教育協会  2015.12 

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    Responsible for pages：「ツルムラサキ疫病」，「ルクリア根腐病」，「パキラ茎腐病」の項  

  • 疫病菌はどのようにして出現したのか

    東條元昭・大谷洋子

    日本植物防疫協会  2015.03 

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    Responsible for pages：45-48  

  • 疫病Q&A－疫病菌の基礎の基礎

    築尾嘉章・景山幸二・東條元昭・植松清次（ Role： Joint author）

    日本植物防疫協会  2015.03 

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    Responsible for pages：54-58  

  • 極地の土壌伝染性植物病原菌

    東條元昭（ Role： Sole author）

    日本土壌微生物学会  2014.10 

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    Responsible for pages：69-71  

  • 疫病菌とピシウム菌　類似点と相違点

    築尾嘉章・東條元昭（ Role： Joint author）

    日本植物防疫協会  2013.10 

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    Responsible for pages：536-552  

  • 疫病菌の選択培地

    東條元昭・築尾嘉章

    日本植物防疫協会  2013.10 

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    Responsible for pages：531-535  

  • Ecological strategies of snow molds to tolerate freezing stress

    Hoshino, T., Xiao, N., Yajima, Y., Kida, K., Tokura, K., Murakami, R., Tojo, M. and Matsumoto, N.（ Role： Joint author）

    Springer  2013.04  （ ISBN:978-1-4614-8253-6 ）

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    Responsible for pages：285-292  

  • Phytopathogenic fungi and fungal-like microbes in Svalbard.

    Tojo, M., Masumoto, S., and Hoshino, T. （ Role： Joint author）

    Springer  2013.04  （ ISBN:978-1-4614-8253-6 ）

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    Responsible for pages：263-284  

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MISC

Presentations

  • Pythium myriotylumによるシソ苗立枯病（新称） Domestic conference

    川澄留佳、小田裕太、東條元昭

    日本植物病理学会大会  2021.03 

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    Presentation type：Poster presentation  

  • Population changes of Globisporangium spp. in a Sanionia moss colony in Ny-Ålesund and their infection to Sanionia moss in an in vitro test International conference

    Fujii, Natumi, Tojo, Motoaki

    The 11th Symposium on Polar Science  2020.12 

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    Presentation type：Poster presentation  

  • アジサイ茎根腐病菌の再同定と本病原菌に対するアジサイ品種の感受性差異 Domestic conference

    永島　進・尤　暁東・埋橋志穂美・東條元昭

    日本植物病理学会関西部会  2020.09 

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    Presentation type：Poster presentation  

Works

  • 南極域における植物病源糸状菌の分布

    2001

  • ノリ赤腐病菌の生態に関する研究

    2001

  • Ecological study on Pythium porphyrae

    2001

  • Diversity of plant pathogenic fungi in Antarctica

    2001

  • 浄水ケーキの有効利用に関する研究

    2000

  • Utilization of sludge from water purification plant

    2000

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Industrial Property Rights

  • タケコンポスト及び植物の病害防除剤

    東條元昭・尤　暁東・下神幸博

    　More details

    property_type：Patent 

    Patent/Registration no：2016-031469 

  • タケコンポスト

    東條元昭・尤　暁東・下神幸博

    　More details

    property_type：Patent 

    Patent/Registration no：2015-176069 

  • 抗ピシウム菌剤

    東條元昭、細江智夫

    　More details

    property_type：Patent 

  • 新規ピシウム菌

    東條　元昭、小林　咲麗、柿嶌　眞、埋橋　志穂美

    　More details

    property_type：Patent 

    Patent/Registration no：特許第5717121号 

Collaborative research (seeds) keywords

  • 植物病害診断

  • 植物病害防除法

  • 微生物学教育

  • 土壌糸状菌同定

Outline of collaborative research (seeds)

  • ミミズの食作用でタケ材を発病抑止型の有機農業培土にする

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    全国的に放置竹林が増加し樹林荒廃などの問題を引き起こしています。タケ材の堆肥化は有効な解決策ですが、分解が遅く、また堆肥の付加価値も低いという課題がありました。今回の技術では、タケ材を細粉にしてミミズに食べさせることで植物病害抑制効果をもつ培土に変えることに成功しました。地域の未利用資源循環と農産物ブランド化を促すために、培土の有機農業や減農薬栽培への活用を試みています。

Grant-in-Aid for Scientific Research

  • New strategies for snow mold control: development of crop growth and disease affected by various snow conditions

    Grant-in-Aid for Scientific Research(B)  2026

  • Species identification, ecological elucidation, and resource value assessment of filamentous fungi parasitic on terrestrial plants and algae in polar regions

    Grant-in-Aid for Scientific Research(C)  2026

  • New strategies for snow mold control: development of crop growth and disease affected by various snow conditions

    Grant-in-Aid for Scientific Research(B)  2025

  • Species identification, ecological elucidation, and resource value assessment of filamentous fungi parasitic on terrestrial plants and algae in polar regions

    Grant-in-Aid for Scientific Research(C)  2025

  • New strategies for snow mold control: development of crop growth and disease affected by various snow conditions

    Grant-in-Aid for Scientific Research(B)  2024

  • Species identification, ecological elucidation, and resource value assessment of filamentous fungi parasitic on terrestrial plants and algae in polar regions

    Grant-in-Aid for Scientific Research(C)  2024

  • 飽差制御によるイチゴの水分ストレス緩和効果と果実への転流促進効果の定量解析

    Grant-in-Aid for Scientific Research(C)  2024

  • 極域の陸上植物や藻類に寄生する糸状菌の種同定、生態解明および資源価値評価

    基盤研究(C)  2023

  • 飽差制御によるイチゴの水分ストレス緩和効果と果実への転流促進効果の定量解析

    Grant-in-Aid for Scientific Research(C)  2023

  • 極地に生息する植物病原菌の生態の解明と資源価値の評価

    Grant-in-Aid for Scientific Research(C)  2022

  • 飽差制御によるイチゴの水分ストレス緩和効果と果実への転流促進効果の定量解析

    Grant-in-Aid for Scientific Research(C)  2022

  • 極地に生息する植物病原菌の生態の解明と資源価値の評価

    Grant-in-Aid for Scientific Research(C)  2021

  • 極地に生息する植物病原菌の生態の解明と資源価値の評価

    Grant-in-Aid for Scientific Research(C)  2020

  • 極地に生息する植物病原菌の生態の解明と資源価値の評価

    2019

  • 極地に生息する植物病原菌の生態の解明と資源価値の評価

    Grant-in-Aid for Scientific Research(C)  2019

  • 極域に生息する植物病原菌の発生生態と遺伝子資源価値の解析

    2018

  • 極域に生息する植物病原菌の発生生態と遺伝子資源価値の解析

    2017

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Charge of on-campus class subject

  • 基礎微生物学

    2024   Weekly class   Undergraduate

  • 農学概論

    2024   Weekly class   Undergraduate

  • バイオエコノミー論

    2024   Weekly class   Undergraduate

  • 応用生物科学概論

    2024   Weekly class   Undergraduate

  • 応用生物科学特論

    2024   Weekly class   Graduate school

  • 応用生物科学研究実験2A

    2024   Intensive lecture   Graduate school

  • 応用生物科学研究実験1A

    2024   Intensive lecture   Graduate school

  • 応用生物科学ゼミナール2A

    2024   Intensive lecture   Graduate school

  • 応用生物科学ゼミナール1A

    2024   Intensive lecture   Graduate school

  • 応用生物科学特別研究実験3A

    2024   Intensive lecture   Graduate school

  • 応用生物科学特別研究実験2A

    2024   Intensive lecture   Graduate school

  • 応用生物科学特別研究実験1A

    2024   Intensive lecture   Graduate school

  • 初年次ゼミナール

    2024   Weekly class   Graduate school

  • 応用生物科学課題研究

    2024   Intensive lecture   Undergraduate

  • 応用生物科学基礎実験B

    2024   Weekly class   Undergraduate

  • 応用生物科学英語

    2024   Intensive lecture   Undergraduate

  • フィールド実習B

    2024   Weekly class   Undergraduate

  • 応用生物科学インターンシップ

    2024   Intensive lecture   Undergraduate

  • 植物保護学

    2024   Weekly class   Undergraduate

  • 植物病理学

    2024   Weekly class   Undergraduate

  • 応用生物科学特別講義B

    2024   Intensive lecture   Graduate school

  • 植物病理学特論

    2024   Weekly class   Graduate school

  • 応用生物科学研究プレゼンテーション

    2024   Intensive lecture   Graduate school

  • 応用生物科学研究実験2B

    2024   Intensive lecture   Graduate school

  • 応用生物科学研究実験1B

    2024   Intensive lecture   Graduate school

  • 応用生物科学ゼミナール2B

    2024   Intensive lecture   Graduate school

  • 応用生物科学ゼミナール1B

    2024   Intensive lecture   Graduate school

  • 応用生物科学特別研究実験3B

    2024   Intensive lecture   Graduate school

  • 応用生物科学特別研究実験2B

    2024   Intensive lecture   Graduate school

  • 応用生物科学特別研究実験1B

    2024   Intensive lecture   Graduate school

  • 植物バイオサイエンス卒業研究

    2024   Intensive lecture   Undergraduate

  • 植物バイオサイエンス演習

    2024   Intensive lecture   Undergraduate

  • 育種・病理学基礎実験

    2024   Weekly class   Undergraduate

  • 植物科学英語

    2024   Intensive lecture   Undergraduate

  • 基礎微生物学

    2023   Weekly class   Undergraduate

  • 応用生物科学特別研究実験2A

    2023   Intensive lecture   Graduate school

  • 植物バイオサイエンス卒業研究

    2023   Intensive lecture   Undergraduate

  • 応用生物科学基礎実験B

    2023   Weekly class   Undergraduate

  • フィールド実習B

    2023   Weekly class   Undergraduate

  • 植物バイオサイエンス演習

    2023   Intensive lecture   Undergraduate

  • 植物保護学

    2023   Weekly class   Undergraduate

  • 育種・病理学基礎実験

    2023   Weekly class   Undergraduate

  • 植物科学英語

    2023   Intensive lecture   Undergraduate

  • 応用生物科学特別研究実験3B

    2023   Intensive lecture   Graduate school

  • Invitation to Plant Biosciences

    2021    

  • Selected Topics in Biological Sciences D

    2021    

  • Research program in Plant Bioscience

    2021    

  • Special Practice in Plant Bioscience

    2021    

  • Introduction of Community Regeneration

    2021    

  • Topics in Plant Pathology

    2021    

  • Topics of Plant Biotechnology

    2021    

  • Plant Pathology

    2021    

  • Basic Microbiology

    2021    

  • Laboratory : Basic Plant Breeding and Pathology

    2021   Practical Training  

  • Introduction to Life, Environment, and Advanced Sciences

    2021    

  • Seminar on regional activity

    2021    

  • Field Exercise for Plant Bioscience Research B

    2021   Practical Training  

  • Plant Protection

    2021    

  • Reviews for Applied Life Sciences

    2021    

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Faculty development activities

  • 2021

    　More details

    農学基礎シリーズ　植物病理学の基礎 夏秋　啓子　他 農山漁村文化協会

  • SiMS活動  2021

    　More details

    運営委員として大学院生の評価を行った。

  • 地域実践演習での取り組み  2021

    　More details

    地域農業や食糧生産の意義と問題点を学域生に考えさせる取り組みを河内長野市などの協力を得て実施した。

  • 2020

    　More details

    植物病理学 第2版 眞山　滋志、土佐　幸雄　他 文英堂

Social Activities　⇒ Link to the list of Social Activities

  • まちライブラリー＠大阪府立大学 アカデミックカフェ 植物医師の立場で考える食糧生産と環境維持

    2021.04 - 2022.03

  • イノベーションストリームＫＡＮＳＡＩ 2021 植物病害抑制効果を示すタケ由来ミミズ堆肥の作出と土壌改良剤としての利用

    2021.04 - 2022.03

  • イノベーション・ジャパン2021～大学見本市 タケ由来ミミズ堆肥中の土壌微生物と植物病害抑制効果

    2021.04 - 2022.03

  • 大阪公立大学開学記念事業 PFCセミナーⅢ　 植物工場における病害虫防除

    2021.04 - 2022.03

  • 植物工場先端技術セミナー イチゴ栽培における病害対策

    2020.04 - 2021.03

  • 施設園芸人材育成支援研修 病害虫診断と防除の話

    2016.04 - 2017.03

  • 日本ーノルウェー共同教育プログラム What is the effect of climate change on plants in Arctic and Alpine areas?

    2016.04 - 2017.03

  • 出前講義 南極・北極に棲むカビの話し

    2010.04 - 2011.03

  • 植物サイエンスカフェ 病害虫・雑草防除のコツ

    2010.04 - 2011.03

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Job title

  • Job title within the department

    School of Agriculture Department of Agricultural Biology 

    学科長  2024.04

  • Job title within the department

    Graduate School of Agriculture Department of Agricultural Biology 

    専攻長  2024.04

Other

  • 研究職歴

    2017.04 - Now

    　 More details

    大阪府立大学大学院生命環境科学研究科　教授

  • 研究職歴

    2007.04 - Now

    　 More details

    大阪府立大学大学院生命環境科学研究科准教授

  • 研究職歴

    2006.04 - 2007.04

    　 More details

    大阪府立大学大学院生命環境科学研究科助教授

  • 研究職歴

    2006.04 - 2007.03

    　 More details

    大阪府立大学大学院生命環境科学研究科　助教授

  • 研究職歴

    1997.04 - Now

    　 More details

    大阪府立大学農学部講師

  • 研究職歴

    1993.04 - Now

    　 More details

    大阪府立大学農学部助手

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