Organic Amendments Enhance Peanut Nodulation by Influencing Interactions Between Rhizobia and Arbuscular Mycorrhizal Fungi in the Peanut Rhizosphere

文献类型： 外文期刊

第一作者： Qin, Wenjing

作者： Qin, Wenjing;Li, Guilong;Liu, Jia;Chen, Xinyi

作者机构：

关键词： organic amendments; nodulation ability; rhizosphere microbial communities; interaction patterns; synergistic action

期刊名称：AGRONOMY-BASEL （ 影响因子：3.4； 五年影响因子：3.8 ）

ISSN：

年卷期： 2024 年 14 卷 12 期

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收录情况： SCI

摘要： The primary mechanism through which organic amendments enhance the nodulation ability of leguminous crops involves increasing the content of available phosphorus (AP) in the soil. Despite this, the role of plant rhizosphere microbial communities has not been fully appreciated. This study investigated the impact of different fertilization treatments, including a no-fertilizer control group (CK), a chemical nitrogen-phosphorus-potassium treatment group (NPK), and a group treated with both organic manure and chemical NPK (NPKM), on the structure of microbial communities in the peanut rhizosphere and their nodulation ability using high-throughput sequencing technology, co-occurrence network analysis, and structural equation modeling. The peanut nodule count increased significantly on organic manure plus NPK application, ranging from 2.26 to 2.50 times that of the CK treatment group. Under NPKM treatment, the diversity of bacterial and rhizobial communities in the peanut rhizosphere significantly improved. Co-occurrence network analysis showed that the peanut rhizosphere microbial co-occurrence network under NPKM treatment was more complex. Additionally, the ecological importance of rhizobial groups within the network significantly increased. Further analysis of the interaction patterns between different microbial groups revealed that under NPKM treatment, the positive correlation ratio between arbuscular mycorrhizal fungi (AMF) and rhizobia (RPAR) was significantly higher than that in the CK and NPK treatment groups. Structural equation modeling (SEM) analysis demonstrated that the RPAR significantly enhanced peanut nodulation ability, an effect that was positively modulated by AP. In summary, this study highlights the potential key role of the synergistic action between rhizobia and AMF in influencing the nodulation process of leguminous plants and provides a scientific basis for the effective management of plant microbial communities.

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