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中国农学通报 ›› 2021, Vol. 37 ›› Issue (18): 138-146.doi: 10.11924/j.issn.1000-6850.casb2020-0605

所属专题: 植物保护 马铃薯

• 植物保护·农药 • 上一篇    下一篇

马铃薯腐烂茎线虫生防细菌的筛选与鉴定

张妞1(), 王东1(), 赵远征2, 项鹏3, 邱廷艳4, 赵鑫1, 高腾达4, 高志超4, 周洪友1()   

  1. 1内蒙古农业大学园艺与植物保护学院,呼和浩特 010018
    2内蒙古自治区农牧业科学院植物保护研究所,呼和浩特 010031
    3黑龙江省农业科学院黑河分院,黑龙江黑河 164312
    4内蒙古喀喇沁旗农牧局植保植检站,内蒙古喀喇沁旗 024409
  • 收稿日期:2020-10-30 修回日期:2021-02-19 出版日期:2021-06-25 发布日期:2021-07-13
  • 通讯作者: 王东,周洪友
  • 作者简介:张妞,女,1992年出生,河南平顶山人,在读硕士研究生,研究方向:马铃薯腐烂茎线虫病防治技术研究。通信地址:010010 内蒙古自治区呼和浩特市内蒙古农业大学鄂尔多斯大街29号 内蒙古农业大学园艺与植物保护学院生命科学大楼306室,Tel:13213787237,E-mail: 1715499521@qq.com
  • 基金资助:
    内蒙古农业大学高层次人才科研启动项目“植物线虫病害微生态调控”(NDYB2018-53);内蒙古自治区自然科学基金“枯草芽胞杆菌ZWZ-19挥发性物质抑制腐烂茎线虫的分子机制研究”(2020BS03034);内蒙古自治区科技成果转化专项“微生态制剂的创制及其防控马铃薯土传病害的示范推广”(2019CG026)

Biocontrol Bacteria Against Ditylenchus destructor: Screening and Identification

Zhang Niu1(), Wang Dong1(), Zhao Yuanzheng2, Xiang Peng3, Qiu Tingyan4, Zhao Xin1, Gao Tengda4, Gao Zhichao4, Zhou Hongyou1()   

  1. 1College of Horticulture and Plant Protection, Inner Mongolia Agricultural University, Hohhot 010018
    2Institute of Plant Protection, Inner Mongolia Academy of Agricultural & Animal Husbandry Sciences, Hohhot 010031
    3Heihe Branch of Heilongjiang Academy of Agricultural Sciences, Heihe Heilongjiang 164312
    4Plant Protection and Plant Quarantine Station, Agricultural and Pastoral Bureau of Karakqin Banner, Karakqin Banner Inner Mongolia 024409
  • Received:2020-10-30 Revised:2021-02-19 Online:2021-06-25 Published:2021-07-13
  • Contact: Wang Dong,Zhou Hongyou

摘要:

本研究旨在开发杀线虫活性高的生防资源以防控马铃薯腐烂茎线虫病。以34个细菌菌株发酵液为试材,通过直接触杀法测定其对马铃薯腐烂茎线虫的触杀活性;利用16S rDNA基因,并结合菌落形态和生理生化特征,确定生防菌株的分类地位。筛选出9个细菌菌株对马铃薯腐烂茎线虫的触杀活性较高,48 h线虫的校正死亡率达72.36%~82.59%;经鉴定,菌株Chi9-7、Nong3-5、Nong5-6和b1-3为枯草芽胞杆菌,菌株b5-4为贝莱斯芽胞杆菌,菌株Chi9-2、Xia4-11、Gu4-7和Z-1为解淀粉芽胞杆菌。本研究筛选并鉴定了杀线虫作用明显的9株芽胞杆菌,为微生物杀线剂的研发提供了新的生防资源,也为马铃薯腐烂茎线虫病的有效防控奠定了基础。

关键词: 马铃薯腐烂茎线虫, 芽胞杆菌, 触杀活性, 生理生化特征, 16S rDNA

Abstract:

The objective is to develop bioagent resources with high nematicidal activity to control Ditylenchus destructor. Fermentation broths of 34 bacterial strains were used to test their contact activities against D. destructor by direct contact method. The classification status of biocontrol bacteria were identified based on colony phenotype, physiological and biochemical characteristics and 16S rDNA gene sequence. The results showed that 9 biocontrol bacteria with high contact activity were screened and could lead to D. destructor with 72.36%-82.59% corrected mortality after being treated with their fermentation broths for 48 h. Strains Chi9-7, Nong3-5, Nong5-6 and b1-3 were identified as Bacillus subtilis. b5-4 was B. velezensis, and Chi9-2, Xia4-11, Gu4-7 and Z-1 were B. amyloliquefaciens. In this study, 9 Bacillus strains with obvious nematicidal effect were screened and identified, which could provide novel biocontrol resources for the development of microbial nematicides and lay a foundation for the effective control of D. destructor.

Key words: Ditylenchus destructor, Bacillus spp., contact activity, physiological and biochemical characteristics, 16S rDNA

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