A microbiota–root–shoot circuit favours Arabidopsis growth over defence under suboptimal light

编号 040030905

推送时间 20210920

研究领域 森林培育 

年份 2021 

类型 期刊 

语种 英语

标题 A microbiota–root–shoot circuit favours Arabidopsis growth over defence under suboptimal light

来源期刊 Nature Plants

期 第309期

发表时间 20210705

关键词 Arabidopsis;  suboptimal light;  MYC2;  root–shoot signalling; 

摘要 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.

服务人员 孙小满

服务院士 尹伟伦

PDF文件 浏览全文