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Independent signalling cues underpin arbuscular mycorrhizal symbiosis and large lateral root induction in rice.

Accepted version
Peer-reviewed

Type

Article

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Authors

Chiu, Chai Hao 

Abstract

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 (CERK1) and α/β-fold hydrolase DWARF14-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 CERK1. Our results demonstrate uncoupling of symbiosis and the symbiotic root developmental signalling during pre-symbiosis with CERK1 required for AMF-induced root architectural changes.

Description

Keywords

Rhizophagus irregularis, D14L, arbuscular mycorrhizal (AM) symbiosis, lateral root, receptor kinase, rice (Oryza sativa), root system architecture, signalling

Journal Title

New Phytologist

Conference Name

Journal ISSN

1469-8137
1469-8137

Volume Title

217

Publisher

Wiley-Blackwell
Sponsorship
Biotechnology and Biological Sciences Research Council (BB/N008723/1)
Biotechnology and Biological Sciences Research Council (BB/M011194/1)
Leverhulme Early Career Fellowship. Grant Number: ECF‐2016‐392