欢迎访问中国生物防治学报,今天是

中国生物防治学报 ›› 2022, Vol. 38 ›› Issue (5): 1280-1287.DOI: 10.16409/j.cnki.2095-039x.2022.06.006

• 研究论文 • 上一篇    下一篇

浙麦冬黑斑病病原菌的分离鉴定及淀粉酶产色链霉菌对其生物防治效果

徐亦雯, 张诺, 曹瑱艳, 申屠旭萍, 俞晓平   

  1. 中国计量大学生命科学学院/浙江省生物计量及检验检疫技术重点实验室, 杭州 310018
  • 收稿日期:2022-02-28 发布日期:2022-10-20
  • 通讯作者: 申屠旭萍,博士,教授,E-mail:stxp@cjlu.edu.cn
  • 作者简介:徐亦雯,女,硕士研究生,E-mail:1249297876@qq.com
  • 基金资助:
    浙江省公益技术研究项目(2017C32006,2018C02030);中国计量大学科研业务费项目学生科技创新专项(2021YW95,2022YW104)

Isolation and Identification of Pathogen of Ophiopogon japonicus Black Spot and Control Effect of Streptomyces diastatochramogenes

XU Yiwen, Zhang Nuo, CAO Zhenyan, SHENTU Xuping, Yu Xiaoping   

  1. Zhejiang Provincial Key Laboratory of Biometrology and Inspection & Quarantine/College of Life Science, China Jiliang University, Hangzhou 310018, China
  • Received:2022-02-28 Published:2022-10-20

摘要: 黑斑病是浙江省慈溪市浙麦冬种植基地常发病害,传染速度快且严重影响麦冬的产量与品质。为了明确引起黑斑病的病原菌以便后续有效防治该病害,本文通过对染病组织培养、病原菌分离纯化和柯赫法则验证、形态学观察与基因序列分析比对(ITS、EF-RPB2Alt a 1His 3ATP),最终鉴定出引起浙麦冬黑斑病的病原菌是链格孢菌Alternaria alternata。研究淀粉酶产色链霉菌Streptomycesdiastatochromogenes 1628代谢产物对黑斑病的防效结果表明,1628代谢产物对链格孢菌菌丝生长具有较强的抑制作用,其EC50=0.764%(体积浓度)。田间防效结果表明7和14 d校正防效分别可达74.08%和65.28%,均高于阳性对照多菌灵。本研究明确了浙麦冬黑斑病病原菌的分类地位,并筛选到能有效抑制该病原菌的生防菌株淀粉酶产色链霉菌,为后续浙麦冬黑斑病的防治提供依据。

关键词: 浙麦冬, 黑斑病, 链格孢菌, 病原菌鉴定, 淀粉酶产色链霉菌1628

Abstract: Black spot disease is a common disease in the planting base of Ophiopogon japonicus in Cixi City,Zhejiang Province.It spreads rapidly and seriously affects the yield and quality of O.japonicus.In order to effectively control the disease,the infected tissue culture,pathogen isolation and purification,Koch's rule verification,the pathogen morphological observation and gene sequence analysis (ITS,TEF-1α,RPB2,Alt a 1,His 3,ATP) were carried out,and the pathogen of O.japonicus black spot was identified as Alternaria alternata.The metabolites of Streptomyces diastochromogenes 1628 obtained in previous study were used for O.japonicus black spot biocontrol.The results showed that S.diastochromogenes 1628 had a strong inhibitory effect on mycelial growth of A.alternata,with EC50 value of 0.764%(the ratio of volume).The corrected control efficacies on black spot of O.japonicus 7 and 14 days after treatment were 74.08% and 65.28%,respectively.The above results provide a basis for the subsequent prevention and control of O.japonicus black spot.

Key words: Ophiopogon japonicas, black spot, Alternaria alternata, identification, Streptomyces diastochromogenes 1628

中图分类号: