天津农学院学报 ›› 2021, Vol. 28 ›› Issue (3): 37-41.doi: 10.19640/j.cnki.jtau.2021.03.008

• 研究与简报 • 上一篇    下一篇

车前子内生细菌的分离、鉴定及生防作用研究

杨雪梅, 苟攀宁, 张云翔, 陆雪兰, 贺艳婷, 田小卫通信作者   

  1. 天津农学院 园艺园林学院,天津 300392
  • 收稿日期:2020-06-28 出版日期:2021-09-30 发布日期:2021-10-07
  • 通讯作者: 田小卫(1976—),男,副教授,博士,主要从事农药学教学及研究工作。E-mail:tianxiaowei@tjau.edu.cn。
  • 作者简介:杨雪梅(1997—),女,学士,专业:植物保护。E-mail:631619477@qq.com。
  • 基金资助:
    天津市大学生创新训练计划项目(201810061040)

Isolation, identification and biocontrol effect of endophytic bacteria in medicinal plant Plantago asiatica

Yang Xuemei, Gou Panning, Zhang Yunxiang, Lu Xuelan, He Yanting, Tian XiaoweiCorresponding Author   

  1. College of Horticulture and Landscape, Tianjin Agricultural University, Tianjin 300392, China
  • Received:2020-06-28 Online:2021-09-30 Published:2021-10-07

摘要: 近年来,植物病虫害的生物防治受到人们广泛关注。为了丰富防治植物病害的拮抗微生物资源,本研究选用中草药——车前子为试验材料,对其内生拮抗细菌进行分离,以苹果腐烂病菌(Valsa mali)、番茄早疫病菌(Alternaria solani)、小麦赤霉病菌(Fusarium graminearum)、黄瓜白粉病菌(Sphaerotheca fuliginea)和草莓灰霉病菌(Botrytis cinerea)为供试病菌,测定其抑菌活性。结果表明,从车前子的不同器官(根、茎、叶、花序)中共分离出20株内生细菌,有5株内生细菌对供试病原菌表现出一定程度的抑制作用,其中R-6菌株的抑菌活性最强,其对草莓灰霉病和黄瓜白粉病的保护和治疗作用分别达到56.9%、50.5% 和49.0%、37.3%。应用形态学、生理生化特性及分子生物学技术对R-6进行了鉴定,初步鉴定R-6菌株为贝莱斯芽孢杆菌(Bacillus velezensis)。

关键词: 车前子, 内生细菌, 筛选, 鉴定, 生防作用

Abstract: In recent years, biocontrol of plant disease has been widely concerned in the world. In order to enrich the resources of antagonistic microorganisms against plant diseases, the Chinese herbal medicine Plantago asiatica was used as experimental material to isolate the endophytic antagonistic bacteria, with Valsa mali, Alternaria solani, Fusarium graminearum,Sphaerotheca fuliginea and Botrytis cinerea used in this study. 20 strains of endophytic bacteria were tested by confrontation method. The results showed that 5 strains of endophytic bacteria showed strong inhibitory effect on the tested pathogens, especially R-6 strains. The protective and therapeutic effects of fermentation products of R-6 on strawberry gray mold and cucumber powdery mildew were 56.9%, 50.5% and 49.0%, 37.3%, respectively. According to its morphological characteristics, physiological and biochemical characteristics and 16S rRNA sequence, the R-6 strain may belong to Bacillus velezensis.

Key words: Plantago asiatica, endophytic bacteria, isolation, identification, biocontrol effect

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