Universität zu Köln

Hou, Shiji ORCID: 0000-0003-3658-2826, Thiergart, Thorsten, Vannier, Nathan, Mesny, Fantin ORCID: 0000-0002-3044-1398, Ziegler, Joerg, Pickel, Brigitte and Hacquard, Stephane ORCID: 0000-0003-2293-3525 (2021). A microbiota-root-shoot circuit favours Arabidopsis growth over defence under suboptimal light. Nat. Plants, 7 (8). S. 1078 - 1109. BERLIN: NATURE PORTFOLIO. ISSN 2055-0278

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Abstract

A synthetic root microbial community rescues weak growth under low light and enhances immunity in Arabidopsis. Transcription factor MYC2 regulates both this coordination between rhizosphere and shoots and the growth/defence trade-off under low light conditions. Bidirectional root-shoot signalling is probably key in orchestrating stress responses and ensuring plant survival. Here, we show that Arabidopsis thaliana responses to microbial root commensals and light are interconnected along a microbiota-root-shoot axis. Microbiota and light manipulation experiments in a gnotobiotic plant system reveal that low photosynthetically active radiation perceived by leaves induces long-distance modulation of root bacterial communities but not fungal or oomycete communities. Reciprocally, microbial commensals alleviate plant growth deficiency under low photosynthetically active radiation. This growth rescue was associated with reduced microbiota-induced aboveground defence responses and altered resistance to foliar pathogens compared with the control light condition. Inspection of a set of A. thaliana mutants reveals that this microbiota- and light-dependent growth-defence trade-off is directly explained by belowground bacterial community composition and requires the host transcriptional regulator MYC2. Our work indicates that aboveground stress responses in plants can be modulated by signals from microbial root commensals.

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Hou, Shiji UNSPECIFIED orcid.org/0000-0003-3658-2826 UNSPECIFIED Thiergart, Thorsten UNSPECIFIED UNSPECIFIED UNSPECIFIED Vannier, Nathan UNSPECIFIED UNSPECIFIED UNSPECIFIED Mesny, Fantin UNSPECIFIED orcid.org/0000-0002-3044-1398 UNSPECIFIED Ziegler, Joerg UNSPECIFIED UNSPECIFIED UNSPECIFIED Pickel, Brigitte UNSPECIFIED UNSPECIFIED UNSPECIFIED Hacquard, Stephane UNSPECIFIED orcid.org/0000-0003-2293-3525 UNSPECIFIED
URN:	urn:nbn:de:hbz:38-577625
DOI:	10.1038/s41477-021-00956-4
Journal or Publication Title:	Nat. Plants
Volume:	7
Number:	8
Page Range:	S. 1078 - 1109
Date:	2021
Publisher:	NATURE PORTFOLIO
Place of Publication:	BERLIN
ISSN:	2055-0278
Language:	English
Faculty:	Unspecified
Divisions:	Unspecified
Subjects:	no entry
Uncontrolled Keywords:	Keywords Language INDUCED SYSTEMIC RESISTANCE; PLANT-GROWTH; TRANSCRIPTION FACTOR; SHADE-AVOIDANCE; SALICYLIC-ACID; JASMONATE; MYC2; PHYTOCHROME; ACTIVATION; RESPONSES Multiple languages Plant Sciences Multiple languages
URI:	http://kups.ub.uni-koeln.de/id/eprint/57762