アーバスキュラー菌根共生、ストリゴラクトン、KAI2 ligand経路の進化/Evolution of arbuscular mycorrhizal symbiosis, strigolactones, and the KAI2 ligand pathway

演題

アーバスキュラー菌根共生、ストリゴラクトン、KAI2 ligand経路の進化/Evolution of arbuscular mycorrhizal symbiosis, strigolactones, and the KAI2 ligand pathway

講演者

亀岡　啓　博士（中国科学院　グループリーダー)/Dr. Hiromu Kameoka, Principal Investigator China Academy of Science, CEMPS/ CEPAMS, China

使用言語

English

日時

2025年12月3日(水曜日) 15：00～16：00

場所

L12

内容

Strigolactones (SLs) and KAI2 ligand (KL) are the plant metabolites that regulate plant development and AM symbiosis. SLs are perveiced by DWARF14 (D14) and work as plant hormones. They are also exuded from roots and work as rhizosphere signals that induce presymbiotic responses in AM fungi. DWARF14 LIKE/KARRIKIN INSENSITIVE2 (D14L/KAI2), a paralog of D14, is thought to perceive unidentified plant hormones, KL, which enhance seed germination and photomorphogenesis. In addition, AM symbiosis is severely disrupted in rice d14l mutants, indicating that the KL signaling pathway regulates AM symbiosis. Thus, SLs and KL, closely related metabolites, regulate AM symbiosis in totally different ways. In this seminar, I will present our recent findings on the functions and evolutions of these metabolites.

Kameoka H, Shimazaki S, Mashiguchi K, Watanabe B, Komatsu A, Yoda A, Mizuno Y, Kodama K, Okamoto M, Nomura T, Yamaguchi S, Kyozuka J. (2023) DIENELACTONE HYDROLASE LIKE PROTEIN1 negatively regulates the KAI2-ligand pathway in Marchantia polymorpha.Current Biology 33:3505–3513
Tanaka K, Wu J, Harada Y, Suzuki T, Yan Y, Setp Y, Kameoka H. (2025) In vitro evaluation of protein–protein interactions in the rice KAI2 ligand signaling complex. bioRxiv 

doi: https://doi.org/10.1101/2025.09.29.679124

問合せ先

Plant Immunity
Saijo Yusuke (saijo@bs.naist.jp)