Updated on 2026/04/20

写真a

 
XI JILI
 
Organization
Graduate School of Science Department of Biology Assistant Professor
School of Science Department of Biology
Title
Assistant Professor
Affiliation
Institute of Science

Position

  • Graduate School of Science  International Research and Education Center (IREC)

    Assistant Professor  2026.04 - Now

  • Graduate School of Science Department of Biology  Laboratory of Animal Physiology

    Assistant Professor  2026.04 - Now

Degree

  • 博士（理学） （ Osaka City University ）

Research Areas

  • Life Science / Animal physiological chemistry, physiology and behavioral biology  / Neuroanatomy, Physiology, Photoperiodism, Neurology, insect

Research Interests

  • Biological clock, Physiology, Neuroanatomy, Insect, Photoperiodism

Professional Memberships

  • The Japanese Society of Applied Entomology and Zoology

    2025.12 - Now

  • Japanese Society of Comparative Physiology and Biochemistry

    2023 - Now

Awards

  • Tomiyuki Hara Award

    2016.09   Japanese Society for Comparative Physiology and Biochemistry  

  • Best Article presented

    xijili, Sakiko Shiga

    2016.09   Japanese Society for Comparative Physiology and Biochemistry   Effects of surgical severance of the posterior optic tract on photoperiodic response in the bean bug, Riptortus pedestris

  • Honorable mention in the student poster contest

    2016.03   a joint conference of 60th annual meeting of the Japanese Society of 76th annual meeting of Applied Entomology and Zoology & Entomological Society of Japan  

Job Career (off-campus)

  • The University of Osaka   International College

    2021.04 - 2026.03

Papers

  • Corazonin mediates photoperiodically-induced diapause in the bean bug <i>Riptortus pedestris</i> Reviewed

    Jili Xi, Yoshitaka Hamanaka, Sakiko Shiga

    Journal of Experimental Biology   2025.05（ ISSN:0022-0949 ） （ eISSN:1477-9145 ）

    　More details

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

    Insects in mid- to high latitudes predict unfavorable seasons through changing photoperiod, and undergo diapause to survive harsh conditions. The circadian clock and brain neurosecretory systems are key components in regulating photoperiodic diapause. However, the neuronal pathways linking these systems, and the neuropeptides involved in photoperiodic diapause remain poorly understood. We have investigated the role of corazonin (CRZ), a conserved neuropeptide regulating metabolic stress and reproduction, in the bean bug Riptortus pedestris, a species highly sensitive to short days for diapause induction. RNA interference demonstrated that Crz-downregulated females significantly averted diapausing phenotypes even under short-day conditions, exhibiting developed ovaries and oviposition, indicating the suppressive effects of Crz on reproduction in photoperiodic diapause. Immunohistochemistry identified three distinct groups of CRZ-immunoreactive (-ir) neurons in the brain. Of these, CRZ-d cells in the pars lateralis (PL) project axons toward the corpus cardiacum-corpus allatum complex and aorta, indicating a neurosecretory role in diapause induction. Additionally, we revealed potential neural connections between CRZ-ir and pigment-dispersing factor (PDF)-ir neurons in the dorso-lateral protocerebrum. The PDF-ir neurons project neurites into/near the accessory medulla (AME), a probable hub for circadian clock regulation, suggesting that photoperiodic information processed in the AME is relayed to CRZ-ir PL neurons. PCR detected Crz receptor expression in the fat body and ovary, suggesting that CRZ-d PL neurons regulate reproductive diapause by directly targeting these tissues in response to photoperiodic inputs. These findings illuminate the neuroendocrine mechanisms underlying photoperiodic reproductive diapause in R. pedestris, highlighting the suppressive role of CRZ under short-day conditions.

    DOI： 10.1242/jeb.250528

  • Neuronal circuitry of photoperiodism proposed in the bean bug Riptortus pedestris. Invited

    Xi Jili

    The Nature & Insects   59 ( 2 )   9 - 14   2024

    　More details

    Authorship：Lead author,　Corresponding author  

  • Circadian clock outputs regulating insect photoperiodism: A potential role for glutamate transporter Reviewed

    Lauren Des Marteaux, Jili Xi, Genyu Mano, Shin G.Goto

    Biochemical and Biophysical Research Communications   589   100 - 106   2022.01

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

  • Mapping PERIOD-immunoreactive cells with neurons relevant to photoperiodic response in the bean bug Riptortus pedestris Reviewed

    Ryohei Koide, Jili Xi, Yoshitaka Hamanaka, Sakiko Shiga

    Cell and Tissue Research   2021.05（ ISSN:0302-766X ） （ eISSN:1432-0878 ）

    　More details

    Publishing type：Research paper (scientific journal)  

    DOI： 10.1007/s00441-021-03451-6

    Other URL： https://link.springer.com/article/10.1007/s00441-021-03451-6/fulltext.html

  • Afferent neural pathways from the photoperiodic receptor in the bean bug, Riptortus pedestris Reviewed

    Jili Xi, Ikuyo Toyoda, Sakiko Shiga

    CELL AND TISSUE RESEARCH   368 ( 3 )   469 - 485   2017.06（ ISSN:0302-766X ） （ eISSN:1432-0878 ）

    　More details

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

    DOI： 10.1007/s00441-016-2565-9

Presentations

  • The neuropeptide corazonin is involved in the photoperiod-dependent regulation of reproduction and thoracic spot formation in the bean bug Riptortus pedestris

    XI JILI, Hamanaka Yoshitaka, Shiga Sakiko

    The 70th Japanese Society Annual Meeting of Applied Entomology and Zoology  2026.03 

    　More details

    Presentation type：Oral presentation (general)  

  • The involvement of the neuropeptide corazonin in photoperiodism in the bean bug Riptortus pedestris Invited International conference

    Xi Jili

    The 32nd Annual Meeting of the Japanese Society for Chronobiology  2025.10 

    　More details

    Presentation type：Oral presentation (invited, special)  

    Venue：Kyoto, Japan  

  • Photoperiodic reproductive suppression mediated by neuropeptide corazonin in the bean bug Riptortus pedestris International conference

    Jili Xi, Yoshitaka Hamanaka, Sakiko Shiga

    2nd Symposium on Invertebrate Neuroscience  2025.09 

    　More details

    Presentation type：Oral presentation (general)  

    Venue：Balaton Limnological Research Institute, Hungary  

  • The roles of corazonin in the body color of the bean bug Riptortus pedestris

    Xijili, Yoshitaka Hamanaka, Sakiko Shiga

    The 46th Annual Meeting of the Japanese Society for Comparative Physiology and Biochemistry  2024.09 

  • The roles of corazonin in photoperiodic ovarian development in the bean bug Riptortus pedestris

    Xijili, Yoshitaka Hamanaka, Sakiko Shiga

    The 45th Annual Meeting of the Japanese Society for Comparative Physiology and Biochemistry  2023.12 

  • Effects of surgical severance of the posterior optic tract on photoperiodic response

    Jlli Xi, Sakiko Shiga

    The 38th Annual Meeting of The Japanese Society for Comparative Physiology and Biochemistry  2016.09 

    　More details

    Presentation type：Poster presentation  

  • Input neuronal pathways for photoperiodism in the bean bug, Riptortus pedestris

    Jlli Xi, Sakiko Shiga

    The 25th International Congress of Entomology  2016.09 

    　More details

    Presentation type：Poster presentation  

  • Neuronal pathways from photoreceptor to brain for photoperiodism in the bean bug Riptortus pedestris

    Jlli Xi, Sakiko Shiga

    A joint conference of 60th annual meeting of the Japanese Society of 76th annual meeting of Applied Entomology and Zoology & Entomological Society of Japan  2016.03 

    　More details

    Presentation type：Poster presentation  

  • Neuronal pathways for photoperiodism in the bean bug Riptortus pedestris

    Jlli Xi, Ikuyo Toyoda, Hideharu Numata, Sakiko Shiga

    The 11th International Neuroethology Conference (ICN) and the 36th Annual Meeting of The Japanese Society for Comparative Physiology and Biochemistry  2014.07 

    　More details

    Presentation type：Poster presentation  

  • Structure of the optic lobe and retinal fiber projections in the bean bug, Riptortus pedestris

    Jili Xi, Ikuyo Toyoda, Hideharu Numata, Sakiko Shiga

    The 35th Annual Meeting of The Japanese Society for Comparative Physiology and Biochemistry 2013  2013 

    　More details

    Presentation type：Poster presentation  

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Charge of on-campus class subject

  • Science Frontier A

    2026   Intensive lecture   Graduate school

  • Science Frontier B

    2026   Intensive lecture   Graduate school

  • Science frontier C

    2026   Intensive lecture   Graduate school

  • Science frontier D

    2026   Intensive lecture   Graduate school

Charge of off-campus class subject

  • Biology and Society

    2024.04
    -
    2026.03
    Institution：The University of Osaka (All department)

  • Basic Biology Experiments

    2024.04
    -
    2026.03
    Institution：The University of Osaka (Undergraduate Course Taught in English, International Undergraduate Program in Science)

  • Biochemistry 1

    2023.04
    -
    2023.08
    Institution：International college

  • Introductory Biology 2

    2022.04
    -
    2023.03
    Institution：Osaka University International College

  • Chemistry & Biology Experiment 2 (English course)

    2021.10
    -
    2023.03
    Institution：Osaka University International College

  • Marine Biology Field Work (English Course)

    2021.07
    -
    2021.09
    Institution：Osaka University International College

  • Chemistry & Biology Experiments 1 (English Course)

    2021.04
    -
    2023.03
    Institution：Osaka University International College

  • A Basic Biology Experiments ( one of eight classes) (English Course)

    2020.04
    -
    2020.09
    Institution：Osaka University International College

  • Exercise Session (Introductory Biology 2)

    2020.04
    -
    2020.09
    Institution：Osaka University International College

  • Introductory Biology 2

    2020.04
    -
    2020.09
    Institution：Osaka University International College

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