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Independent signalling cues underpin arbuscular mycorrhizal symbiosis and large lateral root induction in rice
Author(s) -
Chiu Chai Hao,
Choi Jeongmin,
Paszkowski Uta
Publication year - 2018
Publication title -
new phytologist
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 3.742
H-Index - 244
eISSN - 1469-8137
pISSN - 0028-646X
DOI - 10.1111/nph.14936
Subject(s) - symbiosis , biology , rhizophagus irregularis , mutant , elicitor , root hair , microbiology and biotechnology , arbuscular mycorrhiza , botany , gene , arbuscular mycorrhizal , genetics , bacteria
Summary Perception of arbuscular mycorrhizal fungi ( AMF ) triggers distinct plant signalling responses for parallel establishment of symbiosis and induction of lateral root formation. Rice receptor kinase CHITIN ELICITOR RECEPTOR KINASE 1 ( CERK 1) and α/β‐fold hydrolase DWARF 14‐ LIKE (D14L) are involved in pre‐symbiotic fungal perception. After 6 wk post‐inoculation with Rhizophagus irregularis , root developmental responses, fungal colonization and transcriptional responses were monitored in two independent cerk1 null mutants; a deletion mutant lacking D14L , and with D14L complemented as well as their respective wild‐type cultivars (cv Nipponbare and Nihonmasari). Here we show that although essential for symbiosis, D14L is dispensable for AMF ‐induced root architectural modulation, which conversely relies on CERK 1. Our results demonstrate uncoupling of symbiosis and the symbiotic root developmental signalling during pre‐symbiosis with CERK 1 required for AMF ‐induced root architectural changes.