Effects of Thifluzamide Treatment on the Production of Cell Wall Degrading Enzymes in Rhizoctonia solani and Phenylpropane Metabolism in Pear Fruit

文献类型： 外文期刊

第一作者： Wu, Yushuo

作者： Wu, Yushuo;Yan, Weiwei;Sun, Xiaonan;Zhang, Xinnan;Jia, Xiaohui;Wu, Yushuo;Ge, Yonghong

作者机构：

关键词： Rhizoctonia solani; thifluzamide; pear fruit; cell wall-degrading enzyme; phenylpropanoid pathway

期刊名称：PATHOGENS （ 影响因子：3.3； 五年影响因子：3.6 ）

ISSN：

年卷期： 2024 年 13 卷 11 期

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收录情况： SCI

摘要： The study aimed to investigate the effects of thifluzamide (2.67 mg/L) on 'Huangguan' pear fruit rot caused by Rhizoctonia solani during storage, as well as the activities of polygalacturonase (PG), pectin methylesterase (PME), polygalacturonic acid trans-eliminase (PGTE), pectin methyl trans-eliminase (PMTE), xylanase, and pectate lyase (PL) secreted by R. solani. The results showed that thifluzamide treatment significantly inhibited the activities of PG, PME, PGTE, PMTE, xylanase, and PL secreted by R. solani after 3 days in vitro culture, compared to the control. Thifluzamide also increased the activities of phenylalanine ammonia-lyase (PAL), cinnamate-4-hydroxylase (C4H), and 4-coumarate CoA ligase (4CL), and the contents of flavonoids and total phenolic compounds in pear fruit. Furthermore, thifluzamide increased the expression of PcPAL, PcC4H, Pc4CL, Pc beta-1,3-GA, PcLCH, PcF3H, and PcDFR involved in phenylpropanoid metabolism in pear fruit. In conclusion, thifluzamide treatment reduced the infection ability of R. solani by inhibiting the expression of the genes encoding cell wall-degrading enzymes in R. solani. At the same time, it inhibited the activities of cell wall-degrading enzymes induced resistance against R. solani infection in 'Huangguan' pears by promoting phenylpropane metabolism.

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