Welcome to Chinese Agricultural Science Bulletin,

Chinese Agricultural Science Bulletin ›› 2022, Vol. 38 ›› Issue (13): 148-156.doi: 10.11924/j.issn.1000-6850.casb2021-0784

Special Issue: 生物技术 植物保护

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Antimicrobial Activity of Extracts from Five Thymelaeaceae Plants Against Seven Plant Pathogenic Fungi

CHEN Yunkun(), HU Chunyan, ZHANG Zhiyu, ZHAO Yanfang, CAO Hui()   

  1. College of Plant Protection, Shanxi Agricultural University, Jinzhong, Shanxi 030801
  • Received:2021-08-13 Revised:2021-11-24 Online:2022-05-05 Published:2022-06-08
  • Contact: CAO Hui E-mail:2454394056@qq.com;liusuqi71@163.com

Abstract:

The purpose is to find out whether Thymelaeaceae plants of the same family as Stellera chamaejasme have the potential to become plant resources for controlling pathogenic fungi, and to explore new ways for screening and preparing effective and safe botanical pesticides. Five test materials including Stellera chamaejasme, Lndian wikstroemia, Daphne giraldii, Daphne genkwa, and Edgeworthia chrysantha, were used as representatives of the plants in the Thymelaeaceae family. The results showed that Stellera chamaejasme and Edgeworthia chrysantha performed the best in all extracts, especially against various pathogens of Fusarium wilt. The inhibitory rate at higher concentrations was close to 100%. The inhibitory effect of Daphne giraldii extract on cucumber target spots and strawberry red central pillar was the best among all the extracts, and the EC50 value was 0.925 and 0.920 mg/mL, respectively. Lndian wikstroemia had the worst performance among the 5 kinds of plant extracts of Thymelaeaceae, but it had a good inhibitory effect on tomato wilt and cucumber anthracnose pathogens, and the EC50 value was less than 1.1 mg/mL. The results show that the extracts of five Thymelaeaceae plants have good antimicrobial activity against pathogenic fungi, indicating that Thymelaeaceae plants can be used as screening targets for new plant-derived pesticides.

Key words: Thymelaeaceae plants, plant extract, botanical pesticides, antimicrobial activity, plant phytopathogenic fungi, Edgeworthia chrysantha, secondary metabolite

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