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The diversity and structure of diazotrophic communities in the rhizosphere of coastal saline plants is mainly affected by soil physicochemical factors but not host plant species

文献类型： 外文期刊

作者： Song, Yanjing 1 ; Ma, Lan 1 ; Zhang, Haiyang 1 ; Fu, Rao 1 ; Liang, Xiaoyan 1 ; Li, Junlin 1 ; Li, Jiajia 1 ; Li, Meng 1 ; Shan, Yan 1 ; Cheng, Jieshan 2 ; Wang, Xiangyu 1 ; Zhang, Hongxia 1 ;

作者机构： 1.Shandong Acad Agr Sci, Shandong Inst Sericulture, Yantai, Peoples R China

2.Ludong Univ, Engn Res Inst Agr & Forestry, Yantai, Peoples R China

3.Ludong Univ, Key Lab Mol Module Based Breeding High Yield & Abi, Yantai, Peoples R China

关键词： diazotroph; nifH gene; community structure; rhizosphere; halophyte

期刊名称：FRONTIERS IN MARINE SCIENCE （ 影响因子：3.7； 五年影响因子：4.7 ）

ISSN：

年卷期： 2022 年 9 卷

页码：

收录情况： SCI

摘要： The diversity and community structure of rhizospheric microbes are largely affected by soil physicochemical properties and plant species. In this work, high throughput sequencing and quantitative real-time PCR targeting nifH gene were used to assess the abundance and diversity of diazotrophic community in the coastal saline soils of Yellow River Delta (YRD). We demonstrated that the copy number of nifH gene encoding the Fe protein subunit of the nitrogenase in the nitrogen fixation process was significantly affected by soil physiochemical factors, and the abundance of diazotrophs in the rhizospheric soil samples collected from different locations was positively related with soil physicochemical properties. Soil salinity (P=0.003) and moisture (P=0.003) were significantly co-varied with the OTU-based community composition of diazotrophs. Taxonomic analysis showed that most diazotrophs belonged to the Alphaproteobacteria, Gammaproteobacteria and Deltaproteobacteria. Linear discriminant analysis (LDA) effect size (LEfSe) and canonical correspondence analysis (CCA) showed that diazotrophic community structure significantly varied with soil salinity, moisture, pH and total nitrogen, carbon, sulphur and nitrite (NO2-N) content. Our findings provide direct evidence toward the understanding of different effects of soil physicochemical properties and host plant traits such as halophytes types, life span and cotyledon type, on the community composition of diazotrophic populations in the rhizosphere of plants grown in coastal saline soils.

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