Selenium Improved Phenylacetic Acid Content in Oilseed Rape and Thus Enhanced the Prevention of Sclerotinia sclerotiorum by Dimethachlon
文献类型： 外文期刊
作者： Zhang, Huan 1 ; Cheng, Qin 1 ; Wang, Xu 2 ; Jia, Wei 1 ; Xie, Jiatao 1 ; Fan, Guocheng 3 ; Han, Chuang 1 ; Zhao, Xiaohu 1 ;
作者机构： 1.Huazhong Agr Univ, Coll Resources & Environm, State Key Lab Agr Microbiol, Wuhan 430070, Peoples R China
2.Inst Qual Stand, Monitoring Technol Agroprod Guangdong Acad Agr Sci, Guangzhou 510640, Peoples R China
3.Fujian Key Lab Monitoring & Integrated Management, Fuzhou 350003, Peoples R China
关键词： Sclerotinia sclerotiorum; oilseed rape; inhibition; dimethachlon; phenylacetic acid; gene expression
期刊名称：JOURNAL OF FUNGI （ 影响因子：5.724； 五年影响因子：6.413 ）
ISSN：
年卷期： 2022 年 8 卷 11 期
页码：
收录情况： SCI
摘要： Sclerotinia sclerotiorum is a broad-spectrum necrotrophic phytopathogen that can infect many plant species worldwide. The application of fungicides is a common measure for controlling Sclerotinia sclerotiorum. Due to the risk of developing resistance to fungicides, it is imperative to find ways to be environmentally friendly and even effective. Using bioactive compounds in plants to reduce the amounts of fungicides has become a clean and sustainable strategy of controlling Sclerotinia sclerotiorum. Our study found that selenium in soil mediated the phenylacetic acid-related metabolic pathway in oilseed rape and reduced the incidence rate of Sclerotinia sclerotiorum. The growth-inhibition rates of Sclerotinia sclerotiorum were observed at 25.82%, 19.67%, and 52.61% for treatments of 0.8 mg center dot L-1 dimethachlon, 0.1 mg center dot mL(-1) phenylacetic acid, and dimethachlon (0.8 mg center dot L-1) + phenylacetic acid (0.1 mg center dot mL(-1)), respectively. Phenylacetic acid reduced the application amount of dimethachlon and enhanced the inhibition effect for Sclerotinia sclerotiorum. Results also suggested that phenylacetic acid severely damaged the morphological structure, changed the electrical conductivity, and reduced the capacity of acid production and oxalic acid secretion of Sclerotinia sclerotiorum mycelium. Further studies revealed that phenylacetic acid increased the gene-expression level of Ssodc1, Ssodc2, CWDE2 and CWDE10 in mycelium while decreasing the expression level of SsGgt1, and phenylacetic acid + dimethachlon reduced the relative expression level of SsBil. These findings verified that phenylacetic acid could partially replace the amount of dimethachlon, as well as enhance the prevention of Sclerotinia sclerotiorum by dimethachlon, which provides evidence for developing an environment-friendly method for Sclerotinia sclerotiorum control.
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