Updated on 2024/03/20

写真a

 
Akiyama Kohki
 
Organization
Graduate School of Agriculture Department of Applied Biological Chemistry Professor
School of Agriculture Department of Applied Biological Chemistry
Title
Professor
Affiliation
Institute of Agriculture
Affiliation campus
Nakamozu Campus

Position

  • Graduate School of Agriculture Department of Applied Biological Chemistry 

    Professor  2022.04 - Now

  • School of Agriculture Department of Applied Biological Chemistry 

    Professor  2022.04 - Now

Degree

  • 農学博士 ( Others )

Research Areas

  • Life Science / Bioorganic chemistry  / Natural products chemistry

  • Life Science / Bioorganic chemistry

Research Interests

  • 菌根共生

  • strigolactone

  • キトオリゴ糖

  • arbuscular mycorrhizal fungi

Research subject summary

  • アーバスキュラー菌根菌と植物との共生系における共生制御物質の解明

Research Career

  • アーバスキュラー菌根菌と植物との共生系における共生制御物質の解明

    アーバスキュラー菌根菌、共生、ミヤコグサ、シグナル物質 

    1996.07 - Now 

Professional Memberships

  • 日本農芸化学会

    1990.03 - Now

  • 植物化学調節学会

    1990.10 - Now

  • 植物微生物研究会

    2002.10 - Now

Awards

  • 植物化学調節学会賞

    2016.10   植物化学調節学会  

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    Country:Japan

  • 第3回リサーチフロントアワード

    2012.02   トムソン・ロイター  

  • 平成18年度 農芸化学奨励賞

    2006.03   日本農芸化学会  

  • 平成18年度 B.B.B.論文賞(共著)

    2006.03   日本農芸化学会  

Papers

  • Canonical strigolactones are not the major determinant of tillering but important rhizospheric signals in rice.

    Shinsaku Ito, Justine Braguy, Jian You Wang, Akiyoshi Yoda, Valentina Fiorilli, Ikuo Takahashi, Muhammad Jamil, Abrar Felemban, Sho Miyazaki, Teresa Mazzarella, Guan-Ting Erica Chen, Akihisa Shinozawa, Aparna Balakrishna, Lamis Berqdar, Chakravarty Rajan, Shawkat Ali, Imran Haider, Yasuyuki Sasaki, Shunsuke Yajima, Kohki Akiyama, Luisa Lanfranco, Matias D Zurbriggen, Takahito Nomura, Tadao Asami, Salim Al-Babili

    Science advances   8 ( 44 )   eadd1278   2022.11

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

    Strigolactones (SLs) are a plant hormone inhibiting shoot branching/tillering and a rhizospheric, chemical signal that triggers seed germination of the noxious root parasitic plant Striga and mediates symbiosis with beneficial arbuscular mycorrhizal fungi. Identifying specific roles of canonical and noncanonical SLs, the two SL subfamilies, is important for developing Striga-resistant cereals and for engineering plant architecture. Here, we report that rice mutants lacking canonical SLs do not show the shoot phenotypes known for SL-deficient plants, exhibiting only a delay in establishing arbuscular mycorrhizal symbiosis, but release exudates with a significantly decreased Striga seed-germinating activity. Blocking the biosynthesis of canonical SLs by TIS108, a specific enzyme inhibitor, significantly lowered Striga infestation without affecting rice growth. These results indicate that canonical SLs are not the determinant of shoot architecture and pave the way for increasing crop resistance by gene editing or chemical treatment.

    DOI: 10.1126/sciadv.add1278

    PubMed

  • An ancestral function of strigolactones as symbiotic rhizosphere signals Reviewed International coauthorship

    Kyoichi Kodama, Mélanie K. Rich, Akiyoshi Yoda, Shota Shimazaki, Xiaonan Xie, Kohki Akiyama, Yohei Mizuno, Aino Komatsu, Yi Luo, Hidemasa Suzuki, Hiromu Kameoka, Cyril Libourel, Jean Keller, Keiko Sakakibara, Tomoaki Nishiyama, Tomomi Nakagawa, Kiyoshi Mashiguchi, Kenichi Uchida, Kaori Yoneyama, Yoshikazu Tanaka, Shinjiro Yamaguchi, Masaki Shimamura, Pierre-Marc Delaux, Takahito Nomura, Junko Kyozuka

    Nature Communications   13 ( 1 )   3974   2022.07

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

    DOI: 10.1038/s41467-022-31708-3

  • Strigolactones Modulate Salicylic Acid-Mediated Disease Resistance in Arabidopsis thaliana Reviewed

    Miyuki Kusajima, Moeka Fujita, Khamsalath Soudthedlath, Hidemitsu Nakamura, Koichi Yoneyama, Takahito Nomura, Kohki Akiyama, Akiko Maruyama-Nakashita, Tadao Asami, Hideo Nakashita

    International Journal of Molecular Sciences   23 ( 9 )   5246 - 5246   2022.05( eISSN:1422-0067

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

    Strigolactones are low-molecular-weight phytohormones that play several roles in plants, such as regulation of shoot branching and interactions with arbuscular mycorrhizal fungi and parasitic weeds. Recently, strigolactones have been shown to be involved in plant responses to abiotic and biotic stress conditions. Herein, we analyzed the effects of strigolactones on systemic acquired resistance induced through salicylic acid-mediated signaling. We observed that the systemic acquired resistance inducer enhanced disease resistance in strigolactone-signaling and biosynthesis-deficient mutants. However, the amount of endogenous salicylic acid and the expression levels of salicylic acid-responsive genes were lower in strigolactone signaling-deficient max2 mutants than in wildtype plants. In both the wildtype and strigolactone biosynthesis-deficient mutants, the strigolactone analog GR24 enhanced disease resistance, whereas treatment with a strigolactone biosynthesis inhibitor suppressed disease resistance in the wildtype. Before inoculation of wildtype plants with pathogenic bacteria, treatment with GR24 did not induce defense-related genes; however, salicylic acid-responsive defense genes were rapidly induced after pathogenic infection. These findings suggest that strigolactones have a priming effect on Arabidopsis thaliana by inducing salicylic acid-mediated disease resistance.

    DOI: 10.3390/ijms23095246

    PubMed

  • Response of tomatoes primed by mycorrhizal colonization to virulent and avirulent bacterial pathogens Reviewed

    Moeka Fujita, Miyuki Kusajima, Masatomo Fukagawa, Yasuko Okumura, Masami Nakajima, Kohki Akiyama, Tadao Asami, Koichi Yoneyama, Hisaharu Kato, Hideo Nakashita

    Scientific Reports   12 ( 1 )   4686   2022.03

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

    DOI: 10.1038/s41598-022-08395-7

  • A carlactonoic acid methyltransferase that contributes to the inhibition of shoot branching in Arabidopsis Reviewed International coauthorship

    Kiyoshi Mashiguchi, Yoshiya Seto, Yuta Onozuka, Sarina Suzuki, Kiyoko Takemoto, Yanting Wang, Lemeng Dong, Kei Asami, Ryota Noda, Takaya Kisugi, Naoki Kitaoka, Kohki Akiyama, Harro Bouwmeester, Shinjiro Yamaguchi

    Proceedings of the National Academy of Sciences   119 ( 14 )   2111565119   2022.03

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

    DOI: 10.1073/pnas.2111565119

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Books and Other Publications

  • もっと菌根の世界 知られざる根圏のパートナーシップ

    齋藤雅典、奈良一秀、木下晃彦、小林久泰、馬場隆士、広瀬大、末次健司、秋山康紀、斎藤勝晴、小八重善裕、久我ゆかり、成澤才彦( Role: Contributor ,  第5章 菌根共生の鍵となる物質を探してーストリゴラクトンの発見とその後の展開)

    築地書館  2023.09  ( ISBN:978-4806716556

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    Book type:General book, introductory book for general audience

  • アーバスキュラー菌根菌の共生におけるシグナル物質としてのストリゴラクトンの発見と機能. 植物のシグナル伝達:分子と応答

    秋山 康紀,林 英雄( Role: Joint author)

    共立出版  2010.05 

  • 発芽生物学 種子発芽の生理・生態・分子機構

    秋山康紀,林英雄( Role: Joint author)

    文一総合出版  2009.03 

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    Responsible for pages:5  

MISC

Grant-in-Aid for Scientific Research

  • Dual function of strigolactones as plant hormones to control growth and as signaling molecules to induce symbiosis: its origin and evolution

    Grant-in-Aid for Specially Promoted Research  2024

  • 菌根共生におけるブテノライドシグナルの分子基盤の解明とその応用

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

Charge of on-campus class subject

  • 農学概論

    2024   Weekly class   Undergraduate

  • 生命機能化学概論

    2024   Weekly class   Undergraduate

  • 生命機能化学特論A

    2024   Weekly class   Graduate school

  • 生命機能化学インターンシップ

    2024   Intensive lecture   Undergraduate

  • 天然物化学

    2024   Weekly class   Undergraduate

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Visiting Lectures ⇒ Link to the list of Visiting Lectures

  • アーバスキュラー菌根共生―4億年続いてきた共生系―

    Category:Agricultural science (applied biology, biofunctional chemistry, green space environmental science)

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    Audience:Junior high school students, High school students, College students, Teachers, Researchers, General

    Keyword:菌根菌/共生/ストリゴラクトン 

    植物と菌類との共生体である菌根の成り立ち、植物生産や生態系での働きについて解説

Academic Activities

  • 植物化学調節学会社員(代議員)

    Role(s): Planning, management, etc.

    植物化学調節学会  2020.10 - 2024.09

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    Type:Academic society, research group, etc. 

  • 日本農芸化学会関西支部参与

    Role(s): Planning, management, etc.

    2006.04 - Now

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    Type:Academic society, research group, etc. 

  • 植物化学調節学会編集委員

    Role(s): Planning, management, etc.

Job title

  • Job title within the department

    School of Agriculture Department of Applied Biological Chemistry 

    学科長  2022.04 - 2024.03