数字农科院2.0

The Antifungal Effect Of Garlic Essential Oil On Phytophthora Nicotianae And The Inhibitory Component Involved

文献类型： 外文期刊

作者： Wang, YC; Wei, KK; Han, XB; Zhao, DL; Zheng, YF; Chao, JM; Gou, JY; Kong, FY; Zhang, CS

作者机构：

关键词： Garlic Essential Oil; Diallyl Disulfide; Volatiles; Phytophthora Nicotianae; Biofumigant

期刊名称： BIOMOLECULES

ISSN：

年卷期： 2019 年 9 卷 10 期

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收录情况： JCR（2021版）

摘要： This study explored the chemical compositions of garlic essential oil, the inhibitory activity of garlic essential oil and diallyl disulfide (DADS) against Phytophthora nicotianae, and the effects on mycelial plasma membrane permeability and P. nicotianae inhibition. In total, 29 compounds were detected in garlic essential oil, of which 26 were detected by gas chromatographymass spectrometry (GC-MS) and 21 by headspace solid-phase microextraction (HS-SPME) GC-MS. DADS (60.12% and 19.09%) and trisulfide di-2-propenyl (14.18% and 17.98%) were the major components identified by HS-SPME GC-MS and GC-MS analysis, respectively. Half-inhibitory concentration (Ec50, antagonism) and minimum inhibitory concentration (MIC, fumigation) of DADS against P. nicotianae were 150.83 mu L/L and 20 mu L/L, respectively, while Ec50 of garlic essential oil was 1108.25 mu L/L. Mycelial membrane permeability gradually increased in a concentration-dependent manner, and cell death increased at 450 mu L/L DADS. Furthermore, DADS treatment significantly reduced the incidence of tobacco black shank and the number of P. nicotianae pathogens in rhizosphere soil. DADS also promoted root development of tobacco seedlings at low concentrations, which was inhibited at high concentrations. Therefore, DADS may play an important role in the antifungal effect against P. nicotianae by destroying mycelial cell membrane integrity, causing an increase in cell membrane permeability, and leading to cell death.

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