An ancestral function of strigolactones as symbiotic rhizosphere signals

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 () and Junko Kyozuka ()
Additional contact information
Kyoichi Kodama: Tohoku University
Mélanie K. Rich: Université de Toulouse, CNRS, UPS, Toulouse INP
Akiyoshi Yoda: Tokyo University of Agriculture and Technology
Shota Shimazaki: Tohoku University
Xiaonan Xie: Tokyo University of Agriculture and Technology
Kohki Akiyama: Osaka Prefecture University
Yohei Mizuno: Tohoku University
Aino Komatsu: Tohoku University
Yi Luo: Tohoku University
Hidemasa Suzuki: Tohoku University
Hiromu Kameoka: Tohoku University
Cyril Libourel: Université de Toulouse, CNRS, UPS, Toulouse INP
Jean Keller: Université de Toulouse, CNRS, UPS, Toulouse INP
Keiko Sakakibara: Rikkyo University
Tomoaki Nishiyama: Kanazawa University
Tomomi Nakagawa: National Institute for Basic Biology
Kiyoshi Mashiguchi: Kyoto University
Kenichi Uchida: Teikyo University
Kaori Yoneyama: Ehime University
Yoshikazu Tanaka: Tohoku University
Shinjiro Yamaguchi: Kyoto University
Masaki Shimamura: Hiroshima University
Pierre-Marc Delaux: Université de Toulouse, CNRS, UPS, Toulouse INP
Takahito Nomura: Tokyo University of Agriculture and Technology
Junko Kyozuka: Tohoku University

Nature Communications, 2022, vol. 13, issue 1, 1-15

Abstract: Abstract In flowering plants, strigolactones (SLs) have dual functions as hormones that regulate growth and development, and as rhizosphere signaling molecules that induce symbiosis with arbuscular mycorrhizal (AM) fungi. Here, we report the identification of bryosymbiol (BSB), an SL from the bryophyte Marchantia paleacea. BSB is also found in vascular plants, indicating its origin in the common ancestor of land plants. BSB synthesis is enhanced at AM symbiosis permissive conditions and BSB deficient mutants are impaired in AM symbiosis. In contrast, the absence of BSB synthesis has little effect on the growth and gene expression. We show that the introduction of the SL receptor of Arabidopsis renders M. paleacea cells BSB-responsive. These results suggest that BSB is not perceived by M. paleacea cells due to the lack of cognate SL receptors. We propose that SLs originated as AM symbiosis-inducing rhizosphere signaling molecules and were later recruited as plant hormone.

Date: 2022
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DOI: 10.1038/s41467-022-31708-3

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