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RIN enhances plant disease resistance via root exudate-mediated assembly of disease-suppressive rhizosphere microbiota.

Authors :
Yang, Keming
Fu, Ruixin
Feng, Haichao
Jiang, Gaofei
Finkel, Omri
Sun, Tianyu
Liu, Mingchun
Huang, Baowen
Li, Shan
Wang, Xiaofang
Yang, Tianjie
Wang, Yikui
Wang, Shimei
Xu, Yangchun
Shen, Qirong
Friman, Ville-Petri
Jousset, Alexandre
Wei, Zhong
Source :
Molecular Plant (Cell Press). Sep2023, Vol. 16 Issue 9, p1379-1395. 17p.
Publication Year :
2023

Abstract

The RIPENING-INHIBITOR (RIN) transcriptional factor is a key regulator governing fruit ripening. While RIN also affects other physiological processes, its potential roles in triggering interactions with the rhizosphere microbiome and plant health are unknown. Here we show that RIN affects microbiome-mediated disease resistance via root exudation, leading to recruitment of microbiota that suppress the soil-borne, phytopathogenic Ralstonia solanacearum bacterium. Compared with the wild-type (WT) plant, RIN mutants had different root exudate profiles, which were associated with distinct changes in microbiome composition and diversity. Specifically, the relative abundances of antibiosis-associated genes and pathogen-suppressing Actinobacteria (Streptomyces) were clearly lower in the rhizosphere of rin mutants. The composition, diversity, and suppressiveness of rin plant microbiomes could be restored by the application of 3-hydroxyflavone and riboflavin, which were exuded in much lower concentrations by the rin mutant. Interestingly, RIN-mediated effects on root exudates, Actinobacteria, and disease suppression were evident from the seedling stage, indicating that RIN plays a dual role in the early assembly of disease-suppressive microbiota and late fruit development. Collectively, our work suggests that, while plant disease resistance is a complex trait driven by interactions between the plant, rhizosphere microbiome, and the pathogen, it can be indirectly manipulated using "prebiotic" compounds that promote the recruitment of disease-suppressive microbiota. The RIPENING-INHIBITOR (RIN) gene in tomato is well known for its role in regulating hormone metabolism and fruit ripening. This study shows that RIN is also important for plant immunity through root exudation-mediated recruitment of disease-suppressive microbiota. [ABSTRACT FROM AUTHOR]

Details

Language :
English
ISSN :
16742052
Volume :
16
Issue :
9
Database :
Academic Search Index
Journal :
Molecular Plant (Cell Press)
Publication Type :
Academic Journal
Accession number :
171953900
Full Text :
https://doi.org/10.1016/j.molp.2023.08.004