文章基本信息

标题：Cytokinin-microbiome interactions regulate developmental functions
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作者：Rupali Gupta ; Dorin Elkabetz ; Meirav Leibman-Markus 等
期刊名称：Environmental Microbiome
印刷版ISSN：2524-6372
出版年度：2022
卷号：17
页码：1-16
DOI：10.1186/s40793-022-00397-2
语种：English
摘要：The interaction of plants with the complex microbial networks that inhabit them is important for plant health. While the reliance of plants on their microbial inhabitants for defense against invading pathogens is well documented, the acquisition of data concerning the relationships between plant developmental stage or aging, and microbiome assembly, is still underway. The plant hormone cytokinin (CK) regulates various plant growth and devel‑ opmental processes. Here, examining the relationships between plant development and microbiome assembly, we observed developmental-age dependent changes in the phyllopshere microbiome. We show that age-related shifts in microbiome content vary based on content of, or sensitivity to, CK. Results: We found a developmental age associated decline in microbial richness and diversity, accompanied by a decline in the presence of growth promoting and resistance inducing Bacilli in the phyllosphere. This decline was absent from CK-rich or CK-hypersensitive genotypes. Bacillus isolates we obtained from CK rich genotypes were found to alter the expression of developmental genes to support morphogenesis and alter the leaf developmental program when applied to seedlings, and enhance yield and agricultural productivity when applied to mature plants. Conclusions: Our results support the notion that CK supports developmental functions in part via the bacterial community.
关键词：Bacillus;Cytokinin;Microbiome;Morphogenesis;Plant growth promotion;Plant development