Effects of nitrogen application after abrupt drought-flood alternation on rice root nitrogen uptake and rhizosphere soil microbial diversity
文献类型： 外文期刊
作者： Zhu, Jinyan 1 ; Li, Ao 1 ; Zhang, Jiao 1 ; Sun, Changhui 1 ; Tang, Guoping 4 ; Chen, Le 1 ; Hu, Jinlong 1 ; Zhou, Nianbing 1 ; Wang, Shuai 1 ; Zhou, Yong 1 ; Zhang, Hongcheng 1 ; Xiong, Qiangqiang 1 ;
作者机构： 1.Yangzhou Univ, Jiangsu Key Lab Crop Cultivat & Physiol, Jiangsu Key Lab Crop Genet & Physiol, Agr Coll, Yangzhou 225009, Peoples R China
2.Yangzhou Univ, Jiangsu Coinnovat Ctr Modern Prod Technol Grain Cr, Yangzhou 225009, Peoples R China
3.Jiangxi Irrigat Expt Cent Stn, Nanchang 330201, Peoples R China
4.Jiangxi Acad Agr Sci rice Res Inst, Nanchang 330200, Peoples R China
关键词： Transcriptome; 16S rRNA gene; Root; Nitrogen; Abrupt drought-flood alternation
期刊名称：ENVIRONMENTAL AND EXPERIMENTAL BOTANY （ 影响因子：6.028； 五年影响因子：6.246 ）
ISSN： 0098-8472
年卷期： 2022 年 201 卷
页码：
收录情况： SCI
摘要： Abrupt drought-flood alternation is a frequent meteorological disaster that occurs during the summer in southern China. This study sought to clarify the composition of the bacterial community in the rhizosphere soil of rice under nitrogen (N) application after abrupt drought-flood alternation and to provide more basic data for un-derstanding N absorption by the roots system under N application after abrupt drought-flood alternation. The activity of N metabolism enzymes and the N content and N accumulation in various organs improved under N application after abrupt drought-flood alternation. Between the T1_N and T1 comparison groups, 1758 differ-entially expressed genes were identified, including 1027 upregulated and 731 downregulated genes. Tran-scriptomic GO and KEGG analyses indicated that nitrate assimilation, response to bacterium, defence response to bacterium, and N compound metabolic processes were enriched. At the phylum level, Proteobacteria, Acid-obacteria, Nitrospirota, and Gemmatimonadota were the dominant flora. The root glutamine synthetase activity was significantly negatively correlated with Nitrospirota. Nitrospirota is a key taxon regulating rice root N ab-sorption under N application after abrupt drought-flood alternation. N application after abrupt drought-flood alternation promoted the rapid recovery ability of plants and improved the microbial environment in rice. This study preliminarily clarified the role of microorganisms in the root uptake of rice under N application after abrupt drought-flood alternation.
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