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Aims <p>The inhibitory effect and mechanism of the biological control fungus Chaetomium globosum CEF-082 on pepper Continuous Cropping Obstacles (CCOs) were investigated. Specifically, it evaluated the effect of <i>Chaetomium globosum</i> CEF-082 on the composition structure of the soil microbial community in the rhizosphere of chili peppers.</p> Methods <p>Root zone soil samples were collected in August 2024 from 3-year (Y3) and 20-year (Y20) continuously cropped farmland in Anyang, Henan Province, and subjected to amplicon sequencing. Greenhouse pot experiments were conducted to assess the mitigation of pepper continuous cropping obstacle by <i>Chaetomium globosum</i> CEF-082 spore suspension. Antagonism assays were performed on potato dextrose agar (PDA).</p> Results <p>The results indicated that prolonged planting led to severe soil nutrient loss, a 94.2% decrease in total nitrogen content, and a significant increase in the abundance of the pathogens <i>Fusarium</i>. In vitro experiments confirmed that CEF-082 has a strong antagonistic activity against the main pathogens of <i>Fusarium</i>. Greenhouse pot experiments have shown that the application of CEF-082 can significantly reduce the mortality rate of seedlings and improve the growth parameters of plants. High-throughput sequencing results showed that CEF-082 reshaped the rhizospheric microbial community, reduced the relative abundance of Fusarium, and might promote the colonization of beneficial Trichoderma species.</p> Conclusions <p>We believe that C. globosum CEF-082 alleviates CCOs through multiple mechanisms such as direct antagonism, regulation of rhizosphere microbiota, and improvement of soil nutrient availability. This study provides a sustainable strategy based on the microbiota for the management of soil-borne diseases in solanaceous crops.</p> Graphical Abstract <p></p>

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Alleviation of pepper continuous cropping obstacles by Chaetomium globosum CEF-082 through rhizosphere microbiome manipulation

  • 期刊论文

  • 发表日期：

    2026年3月3日

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  • Peizhen Ding,
  • Jinglong Zhou,
  • Feng Wei,
  • Yalin Zhang,
  • Lihong Zhao,
  • Jiangping Han,
  • Hongjie Feng,
  • Heqin Zhu,
  • Zili Feng

摘要

Aims

The inhibitory effect and mechanism of the biological control fungus Chaetomium globosum CEF-082 on pepper Continuous Cropping Obstacles (CCOs) were investigated. Specifically, it evaluated the effect of Chaetomium globosum CEF-082 on the composition structure of the soil microbial community in the rhizosphere of chili peppers.

Methods

Root zone soil samples were collected in August 2024 from 3-year (Y3) and 20-year (Y20) continuously cropped farmland in Anyang, Henan Province, and subjected to amplicon sequencing. Greenhouse pot experiments were conducted to assess the mitigation of pepper continuous cropping obstacle by Chaetomium globosum CEF-082 spore suspension. Antagonism assays were performed on potato dextrose agar (PDA).

Results

The results indicated that prolonged planting led to severe soil nutrient loss, a 94.2% decrease in total nitrogen content, and a significant increase in the abundance of the pathogens Fusarium. In vitro experiments confirmed that CEF-082 has a strong antagonistic activity against the main pathogens of Fusarium. Greenhouse pot experiments have shown that the application of CEF-082 can significantly reduce the mortality rate of seedlings and improve the growth parameters of plants. High-throughput sequencing results showed that CEF-082 reshaped the rhizospheric microbial community, reduced the relative abundance of Fusarium, and might promote the colonization of beneficial Trichoderma species.

Conclusions

We believe that C. globosum CEF-082 alleviates CCOs through multiple mechanisms such as direct antagonism, regulation of rhizosphere microbiota, and improvement of soil nutrient availability. This study provides a sustainable strategy based on the microbiota for the management of soil-borne diseases in solanaceous crops.

Graphical Abstract