Investigates biocontrol of rot disease in Morchella esculenta, indicating a potential for green strategies.
The microbial community plays a crucial role in plant health and sustainable agricultural development by influencing plant physiology and development. This study aimed to explore the biocontrol potential of Bacillus subtilis A9, an endophytic bacterium isolated from Morchella esculenta, against rot disease caused by Lecanicillium aphanocladii. Metagenomic and metabolomic analyses were conducted on M. esculenta samples sprayed with B. subtilis A9 and a control group sprayed with LB medium. Metagenomic sequencing revealed that B. subtilis A9 significantly altered the microbial community structure and functional composition of M. esculenta, enriching genes related to biofilm formation, arginine and proline metabolism, and sulfur metabolism. Metabolomic analysis indicated significant upregulation of stress-resistant metabolites such as L-proline, ketoleucine, and pelargonic acid. Integrated multi-omics analysis demonstrated a strong correlation between the microbial community structure and the metabolomic profile, suggesting that B. subtilis A9 may be related to the disease-resistance response in the M. esculenta microecosystem. These findings provide a theoretical basis for the biological control of M. esculenta rot disease and support the development of green biocontrol strategies.
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Chao et al. (2026) studied this question.
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