Drought-induced assembly of rhizosphere mycobiomes shows beneficial effects on plant growth

作者：Yanshuo Pan, Binhui Liu, Wenying Zhang, Shan Zhuang, Hongzhe Wang, Jieyin Chen, Liang Xiao, Yuzhong Li, Dongfei Han · 发表于：mSystems · 年份：2024 · DOI：10.1128/msystems.00354-24 · 被引用次数：15 · 研究领域：Mycorrhizal Fungi and Plant Interactions、Microbial Community Ecology and Physiology、Plant-Microbe Interactions and Immunity

ABSTRACT Beneficial interactions between plants and rhizosphere fungi can enhance plant adaptability during drought stress. However, harnessing these interactions will require an in-depth understanding of the response of fungal community assembly to drought. Herein, by using different varieties of wheat plants, we analyzed the drought-induced changes in fungal community assembly in rhizosphere and bulk soil. We demonstrated that drought significantly altered the fungal communities, with the contribution of species richness to community beta diversity increased in both rhizosphere and bulk soil compartments during drought stress. The stochastic processes dominated fungal community assembly, but the relative importance of deterministic processes, mainly homogeneous selection, increased in the drought-stressed rhizosphere. Drought induced an increase in the relative abundance of generalists in the rhizosphere, as opposed to specialists, and the top 10 abundant taxa that enriched under drought conditions were predominantly generalists. Notably, the most abundant drought-enriched taxon in rhizosphere was a generalist, and the corresponding Chaetomium strain was found capable of improving root length and activating ABA signaling in wheat plants through culture-based experiment. Together, these findings provide evidence that host plants exert a strong influence on rhizospheric fungal community assembly during stress and suggest the fungal communities that have experienced drought ha...