The beneficial and pathogenic flora, environmental drivers, and community assembly mechanism of perennial poplar plantation

文献类型： 外文期刊

第一作者： Li, Zhanbiao

作者： Li, Zhanbiao;Qiao, Rongye;Xu, Mingzhen;Wu, Xinyan;Chen, Yifan;Zhang, Pingdong;Guo, Hui;Song, Zhen;Ding, Changjun;Chen, Yinglong;Chen, Yinglong;Guo, Hui

作者机构：

关键词： Perennial poplar plantation; Beneficial microorganism; Pathogenic microorganism; Physicochemical driving factor; Community assembly; Functional verification

期刊名称：PLANT AND SOIL （ 影响因子：4.9； 五年影响因子：5.2 ）

ISSN： 0032-079X

年卷期： 2024 年 498 卷 1-2 期

页码：

收录情况： SCI

摘要： Background and Aims Soil microorganisms play a crucial role in promoting growth and development, nutrient absorption, and disease resistance in poplar plantations. Long-term planting decays soil nutrient contents and changes the microfloral structure, and pathogenic microorganisms accumulate. It is of great significance to clarify the distribution and synergistic relationships between beneficial and pathogenic microorganisms in plantation soil for solving the long-term planting obstacles of poplar plantation.Methods High-throughput sequencing, culture, pure bacterial identification, functional verification, and bioinformatics methods were used to explore the population and functional characteristics of the soil microorganisms in the perennial poplar forest, identify the main pathogenic and beneficial microorganisms in the soil, and investigate the synergistic relationships among the microorganisms in the system.Results An evaluation of soil from a perennial poplar plantation revealed the presence of many beneficial microbes, such as Bacillus, Sphingomonas, Variovorax, and Streptomyces, as well as pathogenic microorganisms, including Fusarium and Alternaria. Most of these microorganisms were enriched in the rhizosphere soil. The study found that phosphorus was the driving factor affecting soil microorganisms, with available phosphorus (K = 0.189) and pH value (K = 0.113) significantly affecting fungal phylogeny. Bacterial community assembly processes were deterministic (beta NTI < - 2), while those of fungi were stochastic (- 1 > beta NTI > - 2). The microbial network in the rhizosphere was more stable than that in the bulk soil. This study expands our knowledge of the functional microbial germplasm resources of forest plantations and provides a theoretical basis for soil remediation in perennial poplar plantations.

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