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Biocontrol Potential of a Mango-Derived Weissella paramesenteroides and Its Application in Managing Strawberry Postharvest Disease

Summary

Researchers discovered that a beneficial bacteria called Weissella paramesenteroides, naturally found on mango surfaces, can protect strawberries from fungal spoilage. This bacteria works by releasing special aromatic compounds (VOCs) into the air that kill disease-causing fungi without direct contact. When used in strawberry storage boxes, this biocontrol method reduced fruit disease from 70% to 35%, offering a safer, natural alternative to synthetic fungicides.

Background

Postharvest fungal diseases cause significant fruit spoilage and economic losses, particularly in perishable commodities like strawberries. Synthetic fungicides have been traditionally used but face limitations due to chemical residues, health concerns, and emerging pathogen resistance. Biocontrol using antagonistic microorganisms offers a promising alternative for managing postharvest fungal diseases.

Objective

This study aimed to isolate a food-safe biocontrol agent from mango fruit surface, characterize its antifungal mechanisms, and evaluate its practical application in managing postharvest strawberry disease. The researchers focused on identifying and validating volatile organic compounds (VOCs) responsible for antifungal activity.

Results

Weissella paramesenteroides strain R2 demonstrated strong antagonistic activity against Botrytis cinerea, Colletotrichum gloeosporioides, and Fusarium oxysporum. GC-MS analysis identified 84 VOCs, with pyrazines (51%) being dominant, including 2,5-dimethylpyrazine, 2,4-di-tert-butylphenol, and 2-furanmethanol. R2 VOC application reduced strawberry disease incidence from 70% to 35%, with 65% of treated fruits remaining disease-free.

Conclusion

W. paramesenteroides R2 functions as an effective food-safe biocontrol agent against postharvest pathogens via VOC-mediated mechanisms. The identification and validation of specific inhibitory compounds provides a mechanistic basis for developing natural antifungal strategies for postharvest disease management.
  • Published in:Journal of Fungi (Basel),
  • Study Type:Experimental Laboratory Study,
  • Source: PMID: 40985435, DOI: 10.3390/jof11070538
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