Mode of action and efficacy of quinolinic acid for the control of Ceratocystis fimbriata on sweet potato
文献类型： 外文期刊
作者： Chen, Ying 1 ; Zhou, Yi-Dong 1 ; Laborda, Pablo 2 ; Wang, Hai-Lin 1 ; Wang, Rui 1 ; Chen, Xian 3 ; Liu, Feng-Quan 3 ; Yan 1 ;
作者机构： 1.Nantong Univ, Sch Life Sci, Nantong 226019, Peoples R China
2.CSIC, Ctr Nacl Biotecnol, Madrid, Spain
3.Jiangsu Acad Agr Sci, Inst Plant Protect, Jiangsu Key Lab Food Qual & Safety, State Key Lab Cultivat Base,Minist Sci & Technol, Nanjing, Peoples R China
4.Xuzhou Inst Agr Sci Xuhuai Dist, Sweet Potato Res Inst, Xuzhou, Jiangsu, Peoples R China
关键词： Ceratocystis fimbriata; quinolinic acid; antifungal activity; ergosterol biosynthesis inhibitor; sweet potato
期刊名称：PEST MANAGEMENT SCIENCE （ 影响因子：4.845； 五年影响因子：4.674 ）
ISSN： 1526-498X
年卷期： 2021 年 77 卷 10 期
页码：
收录情况： SCI
摘要： BACKGROUND Ceratocystis fimbriata is a hazardous fungal pathogen able to cause black rot disease on sweet potato. The management of C. fimbriata strongly relies on the use of toxic fungicides, and there is a lack of efficient alternative strategies. RESULTS The antifungal properties of quinolinic acid (QA) were studied for the first time, indicating that QA shows selective antifungal activity against C. fimbriata. QA inhibited completely the mycelial growth of C. fimbriata at less than 0.8 mg mL(-1) concentration (pH 4), and was able to produce alterations in the fungal cell wall, and to impede spore agglutination and mycelium formation. QA significantly reduced the concentration of ergosterol, and was able to associate to iron (II), suggesting that QA may be a lanosterol 14-alpha demethylase inhibitor. In preventive applications, QA reduced the disease incidence of C. fimbriata on sweet potato by 75%, achieving higher control efficacy in comparison with commercial fungicides prochloraz and carbendazim. CONCLUSIONS The first selective antifungal agent against C. fimbriata was discovered in this work, and showed suitable antifungal properties for the management of black rot disease.
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