Antagonistic Effects and Volatile Organic Compound Profiles of Rhizobacteria in the Biocontrol of <i>Phytophthora capsici</i>

Antagonistic Effects and Volatile Organic Compound Profiles of Rhizobacteria in the Biocontrol of <i>Phytophthora capsici</i>

<i>Phytophthora capsici</i> is a devastating pathogen in horticultural crops, particularly affecting <i>Capsicum annuum</i> (pepper). The overuse of chemical fungicides has led to resistance development, necessitating alternative strategies. This study investigates the antago...

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Main Authors: José Luis Ávila-Oviedo, Carlos Méndez-Inocencio, María Dolores Rodríguez-Torres, María Valentina Angoa-Pérez, Mauricio Nahuam Chávez-Avilés, Erika Karina Martínez-Mendoza, Ernesto Oregel-Zamudio, Edgar Villar-Luna
Format: Article
Language:English
Published: MDPI AG 2024-11-01
Series:Plants
Subjects:
biological control
fungicide alternatives
microbial interactions
plant disease management
sustainable agriculture
Online Access:https://www.mdpi.com/2223-7747/13/22/3224
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Summary:<i>Phytophthora capsici</i> is a devastating pathogen in horticultural crops, particularly affecting <i>Capsicum annuum</i> (pepper). The overuse of chemical fungicides has led to resistance development, necessitating alternative strategies. This study investigates the antagonistic effects of four rhizobacterial isolates (<i>Bacillus</i> sp., <i>Pseudomonas putida</i>, <i>Bacillus subtilis</i>, <i>Bacillus amyloliquefaciens</i>) against <i>P. capsici</i>, focusing on the production of volatile organic compounds (VOCs). Using in vitro dual culture assays, we observed a significant inhibition of mycelial growth and sporangia production, especially by <i>B. subtilis</i> and <i>B. amyloliquefaciens</i>. The GC-MS/SPME-HS analysis identified key VOCs responsible for these antagonistic effects. Our findings demonstrate that specific rhizobacteria and their VOCs offer a promising biocontrol strategy, potentially reducing the reliance on chemical fungicides and contributing to sustainable agriculture.
ISSN:2223-7747

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