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

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Abstract

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 (βNTI <  − 2), while those of fungi were stochastic (− 1 > βNTI >  − 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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Data Availability

The datasets used and/or analysed during the current study are available from the corresponding author on reasonable request.

References

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Funding

This work was funded by National Key Research and Development Program of China [2021YFD2201205], National Natural Science Foundation of China [41601513 and 41977203], National Training Program of Innovation and Entrepreneurship for Undergraduates [202110022017], and College Student Research and Career-creation Program of Beijing [S202210022046]. Yinglong Chen was supported by Australian Research Council [FT210100902].

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Authors and Affiliations

Authors

Contributions

Zhanbiao Li, Zhen Song and Rongye Qiao: Conceptualization, Methodology, Investigation, Writing-original draft, Writing-Review & Editing; Pingdong Zhang and Changjun Ding: Software & Formal analysis; Mingzhen Xu, Xinyan Wu and Yifan Chen: Experiment, Validation, Resources & Data curation;

Yinglong Chen: Writing-Review & Editing; Hui Guo: Conceptualization, Methodology, Writing—Review & Editing, Supervision, Funding acquisition.

Corresponding author

Correspondence to Hui Guo.

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Conflict of interest

The authors have no relevant financial or non-financial interests to disclose.

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Responsible Editor: Hans Lambers.

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Li, Z., Song, Z., Qiao, R. et al. The beneficial and pathogenic flora, environmental drivers, and community assembly mechanism of perennial poplar plantation. Plant Soil 498, 259–277 (2024). https://doi.org/10.1007/s11104-023-06433-5

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  • DOI: https://doi.org/10.1007/s11104-023-06433-5

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