ORIGINAL RESEARCH article
Front. Microbiol.
Sec. Terrestrial Microbiology
Volume 16 - 2025 | doi: 10.3389/fmicb.2025.1628234
This article is part of the Research TopicBiogeochemical Processes of Nutrients: Impacts of Global Changes and Human Activities on Microbial Communities in Terrestrial EcosystemsView all 4 articles
Soil microbiome dysbiosis and rhizosphere metabolic dysfunction drive continuous cropping obstacles of Codonopsis tangshen
Provisionally accepted
- 1Institute of Plant Protection and Soil Fertilizers, Hubei Academy of Agricultural Sciences, Wuhan City, Hubei Province, China
- 2Institute of Chinese Herbal Medicines, Hubei Academy of Agricultural Sciences, Enshi City, Hubei Province, China
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Successive monocropping of Codonopsis tangshen causes continuous cropping obstacles, impairing growth, yield, and quality. To investigate the soil environmental and microbial changes caused by these obstacles, we collected both continuous cropping (C-crop) and non-continuous cropping (NC-crop) soil for analysis. We employed high-throughput sequencing, Biolog-ECO microplate, and metabolomics technology to evaluate microbial diversity, community structure, and carbon source utilization efficiency. Compared with NC-crop, C-crop decreased the yield and polysaccharide content of C. tangshen by 40.47% and 29.4%, respectively. Continuous cropping significantly altered soil physicochemical properties and metabolomes, driving distinct shifts in microbial community structure and impairing carbon utilization efficiency. Microbial carbon use efficiency was positively correlated with key soil bacteria and fungi. However, their abundance decreased significantly under continuous cropping, ultimately disrupting soil carbon cycling. Moreover, key bacterial (e.g., Flavobacterium, Lysobacter, Pseudomonas, Burkholderia) and fungal genera (e.g., Ophiosphaerella, Dactylonectria, Humicola) showed strong correlations with critical soil physicochemical properties, microbial carbohydrate metabolism, and rhizosphere metabolite profiles. The reduced abundance of these microbes disrupted soil nutrient balance and microbial activity, potentially contributing to C. tangshen continuous cropping obstacles. This study contributes to the understanding of the mechanisms underlying continuous cropping obstacles in C. tangshen and lays the foundation for developing strategies to alleviate these obstacles.
Keywords: Continuous cropping obstacles, Codonopsis tangshen, soil microbiome, Soil metabolomics, Carbon source utilization
Received: 14 May 2025; Accepted: 27 Jun 2025.
Copyright: © 2025 Xu, Peng, Si, Xu, Zhao and Zhou. This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) or licensor are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.
* Correspondence: Wuxian Zhou, Institute of Chinese Herbal Medicines, Hubei Academy of Agricultural Sciences, Enshi City, Hubei Province, China
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