An ancestral function of strigolactones as symbiotic rhizosphere signals

• DOI: 10.1038/s41467-022-31708-3
• Publication Date: 2022-07-08T18:03:00Z
• Authors: 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
• Keywords: Strigolactone

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