ORIGINAL RESEARCH article
Front. Microbiol.
Sec. Terrestrial Microbiology
Volume 16 - 2025 | doi: 10.3389/fmicb.2025.1516835
This article is part of the Research TopicUnveiling Microbiome Interactions and Functions in Soil HotspotsView all 11 articles
Impact Assessment of Differential Chlormequat Chloride (CC) Exposure on Soil Fungal Community Dynamics
Provisionally accepted
Qiujun Lin1,2,3
Xianxin Wu1,2Chunjing Guo1,2Lina Li1,2Tianshu Peng1,2Xun Zou1,2Guang Li1,2Jianzhong Wang1,2*- 1Institute of Agricultural Quality Standards and Testing Technology, Liaoning Academy of Agricultural Sciences, Shenyang, China
- 2Agricultural Product Quality and Safety Risk Assessment Laboratory of the Ministry of Agriculture and Rural Affairs, Shenyang, China
- 3Key Laboratory of Oilseeds Processing，Ministry of Agriculture and Rural Affairs, Wuhan, China
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This study investigated the dose-dependent effects of chlormequat chloride (CC) applications on soil fungal community structure and diversity through a controlled field experiment. Four treatment regimes were established: control (CK, no CC application), low-dose (D, 45 g active ingredient/ha), medium-dose (M, 75 g a.i./ha), and high-dose (G, 225 g a.i./ha). CC solutions were applied during critical growth phases (flowering and pod-setting stages) of peanut cultivation. Rhizosphere soil samples were collected 30-days post-application for-application for microbial analysis. Alpha diversity assessments revealed significant concentration-dependent responses, with the low-dose treatment exhibiting statistically higher Shannon diversity indices (p<0.05) compared to other treatments. Beta diversity analysis indicated distinct community composition patterns, characterized notably by reduced Ascomycota abundance (from 92.08% in CK to 25.84% in D) under increasing CC concentrations. Basidiomycota displayed relative stability, suggesting enhanced tolerance to CC stress. Functional guild analysis identified significant shifts in pathogenic and saprophytic fungal populations. Neonectria spp. declined drastically from 92.08% in CK to 25.84% under D treatment, whereas Plectosphaerella spp. proliferated markedly (28.68% in D; 22.82% in G vs. 2.26% in CK). These findings establish clear dose-response relationships between CC exposure levels and fungal community parameters.
Keywords: Chlormequat chloride, soil mycobiome, β-diversity, Agroecosystem resilience, Xenobiotic stress response, Peanut rhizosphere
Received: 28 Oct 2024; Accepted: 30 Jun 2025.
Copyright: © 2025 Lin, Wu, Guo, Li, Peng, Zou, Li and Wang. 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: Jianzhong Wang, Institute of Agricultural Quality Standards and Testing Technology, Liaoning Academy of Agricultural Sciences, Shenyang, China
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