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Assembly and maintenance of phyllosphere microbial diversity during rubber tree leaf senescence

文献类型： 外文期刊

作者： Lan, Guoyu 1 ; Wei, Yaqing 1 ; Zhang, Xicai 1 ; Wu, Zhixiang 1 ; Ji, Kepeng 1 ; Xu, Han 3 ; Chen, Bangqian 1 ; He, Fangliang 4 ;

作者机构： 1.Chinese Acad Trop Agr Sci, Rubber Res Inst, Xueyuan Rd, Haikou 571101, Hainan, Peoples R China

2.Hainan Danzhou Trop Agroecosyst Natl Observat & Re, Danzhou 571737, Hainan, Peoples R China

3.Chinese Acad Forestry, Inst Trop Forestry, Res, Guangzhou 510520, Guangdong, Peoples R China

4.Univ Alberta, Dept Renewable Resources, Edmonton, AB T6G 2H1, Canada

期刊名称：COMMUNICATIONS BIOLOGY （ 影响因子：5.1； 五年影响因子：5.8 ）

ISSN：

年卷期： 2024 年 7 卷 1 期

页码：

收录情况： SCI

摘要： Phyllosphere microorganisms execute important ecological functions including supporting host plant growth, enhancing host resistance to abiotic stresses, and promoting plant diversity. How leaf developmental stages affect plant-microbiome interactions and phyllosphere microbial community assembly and diversity is poorly understood. In this study, we utilized amplicon sequencing of 16S rRNA and ITS genes to investigate the composition and diversity of microbial communities across different leaf developmental stages of rubber trees. Our findings reveal that endophytic microbial communities, particularly bacterial communities, are more influenced by leaf senescence than by epiphytic communities. The high abundance of metabolism genes in the endosphere of yellow leaves contributes to the degradation and nutrient relocation processes. Nutrient loss leads to a higher abundance of alpha-Proteobacteria (r-selected microorganisms) in the yellow leaf endosphere, thereby promoting stochastic community assembly. As leaves age, the proportion of microorganisms entering the inner layer of leaves increases, consequently enhancing the diversity of microorganisms in the inner layer of leaves. These results offer insights into the mechanisms governing community assembly and diversity of leaf bacteria and fungi, thereby advancing our understanding of the evolving functions of microbial communities during leaf senescence in general, and for an important tropical crop species in particular. Leaf senescence has significant impacts on the composition, diversity, assembly, and functions of phyllosphere microbiomes, especially impacting endophytic bacterial communities.

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