Independent signalling cues underpin arbuscular mycorrhizal symbiosis and large lateral root induction in rice. Issue 2 (30th November 2017)

• Record Type: Journal Article
• Authors: Chiu, Chai Hao; Choi, Jeongmin; Paszkowski, Uta
• Is Part Of: New phytologist. Volume 217:Issue 2(2018)
• Page Start: 552
• Page End: 557
• Publication Date: 2017-11-30
• Subjects: arbuscular mycorrhizal (AM) symbiosis -- D14L -- lateral root -- receptor kinase -- Rhizophagus irregularis -- rice (Oryza sativa) -- root system architecture -- signalling; Botany -- Periodicals; 580
• DOI: 10.1111/nph.14936
• Languages: English
• ISSNs: 0028-646X

Abstract

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 (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.