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Compost mediates the recruitment of core bacterial communities in alfalfa roots to enhance their productivity potential in saline-sodic soils

文献类型： 外文期刊

作者： Wei, Tian-Jiao 1 ; Li, Guang 1 ; Cui, Yan-Ru 1 ; Xie, Jiao 1 ; Teng, Xing 1 ; Wang, Yan-Jing 1 ; Li, Zhong-He 1 ; Guan, Fa-Chun 1 ; Liang, Zheng-Wei 2 ;

作者机构： 1.Jilin Acad Agr Sci, China Agr Sci & Technol Northeast Innovat Ctr, Changchun, Peoples R China

2.Chinese Acad Sci, Northeast Inst Geog & Agroecol, Changchun, Peoples R China

关键词： compost; saline-sodic soil; core rhizosphere bacterial community; alfalfa; plant productivity

期刊名称：FRONTIERS IN MICROBIOLOGY （ 影响因子：4.5； 五年影响因子：5.2 ）

ISSN：

年卷期： 2024 年 15 卷

页码：

收录情况： SCI

摘要： Introduction Composting is one of the effective environmental protection and sustainable measures for improving soil quality and increasing crop yield. However, due to the special physical and chemical properties of saline-sodic soil and the complex rhizosphere microecological environment, the potential mechanism of regulating plant growth after applying compost in saline-sodic soil remains elusive.Methods Here, we investigated the effects of different compost addition rates (0, 5, 15, 25%) on plant growth traits, soil chemical properties, and rhizosphere bacterial community structure.Results The results showed that compost promoted the accumulation of plant biomass and root growth, increased soil nutrients, and enhanced the diversity and complexity of the rhizosphere bacterial communities. Moreover, the enriched core bacterial ASVs (Amplicon Sequence Variants) in compost treatment could be reshaped, mainly including dominant genera, such as Pseudomonas, Devosia, Novosphingobium, Flavobacterium, and Allorhizobium-Neorhizobium-Pararhizobium-Rhizobium. The functions of these ASVs were energy resources and nitrogen cycle functions, suggesting the roles of these ASVs in improving plant root nutrient resource acquisition for alfalfa growth. The contents of available potassium, available phosphorus, total nitrogen, and organic carbon of the soil surrounding the roots, the root length, root surface area, root volume, and root tips affected the abundance of the core bacterial ASVs, and the soil chemical properties contributed more to the effect of plant biomass.Discussion Overall, our study strengthens the understanding of the potentially important taxa structure and function of plant rhizosphere bacteria communities, and provides an important reference for developing agricultural microbiome engineering techniques to improve root nutrient uptake and increase plant productivity in saline-sodic soils.

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