Carvacrol Effectively Inhibits <i>Pseudomonas tolaasii</i> In Vitro and Induces Resistance to Brown Blotch Disease in Postharvest <i>Agaricus bisporus</i>

Carvacrol Effectively Inhibits <i>Pseudomonas tolaasii</i> In Vitro and Induces Resistance to Brown Blotch Disease in Postharvest <i>Agaricus bisporus</i>

Carvacrol (CAR), a naturally occurring phenolic monoterpene compound, has recently received attention for its potential use in food preservation. However, whether it is effective in controlling brown blotch disease caused by <i>Pseudomonas tolaasii</i> in edible mushrooms is unknown. The...

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Bibliographic Details
Main Authors: Lei Zhang, Rui Song, Zixuan Shi, Shuai Yuan, Lu Jiao, Mengsha Ma, Xing Wang, Lin Chen, Xia Liu, Demei Meng
Format: Article
Language:English
Published: MDPI AG 2024-11-01
Series:Foods
Subjects:
antibacterial activity
action mechanism
brown blotch disease
carvacrol
disease resistance
edible mushrooms
Online Access:https://www.mdpi.com/2304-8158/13/22/3689
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Summary:Carvacrol (CAR), a naturally occurring phenolic monoterpene compound, has recently received attention for its potential use in food preservation. However, whether it is effective in controlling brown blotch disease caused by <i>Pseudomonas tolaasii</i> in edible mushrooms is unknown. The results of this study showed that CAR effectively inhibits and kills <i>P. tolaasii</i> in vitro by disrupting cell membrane integrity and causing the leakage of cellular components. Intracellular proteins and the DNA of <i>P. tolaasii</i> may not be the targets of CAR. CAR fumigation at a concentration as low as 20 μmol L<sup>−1</sup> CAR effectively inhibited <i>P. tolaasii</i>-caused brown blotch disease in <i>Agaricus bisporus</i>, accompanied by a decrease in polyphenol oxidase activation, melanin production, and malondialdehyde accumulation. CAR treatment also significantly increased the activities of β-1,4-N-acetyl-glucosaminnidase, three antioxidant enzymes, and phenylpropanoid pathway-related enzymes, as well as promoting the accumulation of phenolic, flavonoid, and lignin substances in mushrooms, thereby inducing the resistance of mushrooms to the disease. These results demonstrate the potential application of carvacrol to control bacterial disease in <i>A. bisporus</i> mushrooms.
ISSN:2304-8158

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