Impact of waterlogging and heat stress on rice rhizosphere microbiome assembly and potential function in carbon and nitrogen transformation

文献类型： 外文期刊

第一作者： Liu, Jieyun

作者： Liu, Jieyun;Qiu, Husen;Zhang, Haiyang;Liu, Jieyun;Qiu, Husen;Zhang, Haiyang;Zhen, Bo;Zhou, Xinguo

作者机构：

关键词： Deep flooding; heat stress; rhizosphere; bacterial community composition; functional genes

期刊名称：ARCHIVES OF AGRONOMY AND SOIL SCIENCE （ 影响因子：2.242； 五年影响因子：2.76 ）

ISSN： 0365-0340

年卷期：

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收录情况： SCI

摘要： The impacts of rhizosphere microorganisms on the turnover of nutrients are affected by many environmental factors. In this study, rice plants were subjected to deep flooding and heat stress for one week at the jointing stage. Rhizospheric soil was sampled for the analysis of rice rhizosphere bacterial assembly and functional groups responsible for carbon and nitrogen transformation. Compared with the control, both deep flooding and heat stress increased bacterial alpha diversity. Moreover, heat stress and the interactions of heat stress and deep flooding improved the bacterial cooperation. Heat stress reduced the relative abundance of Actinobacteria and Firmicutes, which are responsible for organic carbon decomposition. The relative abundance of the gene encoding lignin-degrading catalases under deep flooding and heat stress treatments reduced by 6% and 8%, respectively. The interaction of heat stress and deep flooding increased the relative abundance of the nifD gene by 5%, may slowed down nitrate reduction to nitrite. Our results highlight the effects of heat and flooding stress on the bacteria-mediated mechanisms responsible for regulating organic carbon sequestration and nitrogen cycling in rhizosphere of paddy fields.

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