Journal
PEST MANAGEMENT SCIENCE
Volume -, Issue -, Pages -Publisher
JOHN WILEY & SONS LTD
DOI: 10.1002/ps.7910
Keywords
honokiol; Botryosphaeria dothidea; antifungal mechanism; transcriptome analysis; membrane lipid biosynthesis
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This study found that honokiol can inhibit the growth and pathogenicity of Botryosphaeria dothidea, possibly through compromising cell membrane integrity and inhibiting lipid biosynthesis. Honokiol may serve as an environmentally friendly approach to prevent soft rot in kiwifruits.
BACKGROUND: Kiwifruit soft rot is mainly caused by Botryosphaeria dothidea, representing a considerable threat to kiwifruit industry. This investigation assessed the inhibitory consequences and mechanisms of honokiol against B. dothidea, evaluating the inhibitory effects and underlying mechanism.RESULTS: A strain of B.dothidea (XFCT-2) was isolated from infected soft rot kiwifruit. The findings indicate that honokiol hindered the mycelial growth, conidial germination, and pathogenicity of B. dothidea in a dose-dependent manner, both in vitro and in vivo. Furthermore, ultrastructural examinations showed that honokiol impaired the integrity of B. dothidea, leading to an elevation in cell membrane permeability, engendering a multitude of intracellular substance extravasations and hampering energy metabolism. Transcriptome analysis exhibited that honokiol-regulated genes were related to membrane lipid biosynthesis, comprising ACC1, FAS2, Arp2, gk, Cesle, and Etnk1. These findings indicate that honokiol impedes B. dothidea by obstructing lipid biosynthesis within the cell membrane and compromising its integrity, halting the growth of the mycelia, which could potentially cause cellular demise.CONCLUSION: This investigation illustrates how honokiol functions as an eco-friendly approach to prevent the occurrence of soft rot in kiwifruits.(c) 2023 Society of Chemical Industry.
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