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Soil bacterial communities of paddy are dependent on root compartment niches but independent of growth stages from Mollisols of Northeast China

文献类型： 外文期刊

作者： Liu, Kai 1 ; Wang, Qiuju 2 ; Sun, Minglong 3 ; Gao, Shiwei 4 ; Liu, Qing 4 ; Shan, Lili 5 ; Guo, Junxiang 5 ; Bian, Jingyang 6 ;

作者机构： 1.Heilongjiang Acad Agr Sci, Harbin, Peoples R China

2.Heilongjiang Acad Black Soil Conservat & Utilizat, Harbin, Peoples R China

3.Heilongjiang Acad Agr Sci, Crop Resources Inst, Harbin, Peoples R China

4.Heilongjiang Acad Agr Sci, Suihua Branch, Suihua, Peoples R China

5.Heilongjiang Acad Agr Sci, Rice Res Inst, Jiamusi, Peoples R China

6.Heilongjiang Acad Agr Sci, Daqing Branches, Daqing, Peoples R China

关键词： bacterial microbiome; distribution; MiSeq sequencing; co-occurrence network; rice fields

期刊名称：FRONTIERS IN MICROBIOLOGY （ 影响因子：5.2； 五年影响因子：6.2 ）

ISSN：

年卷期： 2023 年 14 卷

页码：

收录情况： SCI

摘要： Introduction: Deep insights into adhering soil of root zones (rhizosphere and rhizoplane) microbial community could provide a better understanding of the plant-microbe relationship. To better understand the dynamics of these microbial assemblies over the plant life cycle in rhizodeposition along rice roots. Methods: Here, we investigated bacterial distribution in bulk, rhizosphere, and rhizoplane soils at tillering, heading, and mature stage, from rice (Oryza sativa) fields of the Northeast China. Results and Discussion: Our results revealed that soil bacterial alpha-diversity and community composition were significantly affected by root compartment niches but not by temporal change. Compared to rhizoplane soils in the same period, bulk in the heading and rhizosphere in the mature had the largest increase in Shannon's index, with 11.02 and 14.49% increases, respectively. Proteobacteria, Chloroflexi, Bacteroidetes, and Acidobacteria are predominant across all soil samples, bulk soil had more phyla increased across the growing season than that of root related-compartments. Deterministic mechanisms had a stronger impact on the bacterial community in the compartments connected to the roots, with the relative importance of the bulk soil, rhizoplane and rhizosphere at 83, 100, and 56%, respectively. Because of ecological niche drivers, the bacterial networks in bulk soils exhibit more complex networks than rhizosphere and rhizoplane soils, reflected by more nodes, edges, and connections. More module hub and connector were observed in bulk (6) and rhizoplane (5) networks than in rhizosphere (2). We also detected shifts from bulk to rhizoplane soils in some functional guilds of bacteria, which changed from sulfur and nitrogen utilization to more carbon and iron cycling processes. Taken together, our results suggest distinct bacterial network structure and distribution patterns among rhizosphere, rhizoplane, and bulk soils, which could possibly result in potential functional differentiation. And the potential functional differentiation may be influenced by plant root secretions, which still needs to be further explored.

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