北方农业学报 ›› 2020, Vol. 48 ›› Issue (1): 75-80.doi: 10.12190/j.issn.2096-1197.2020.01.15

• 土壤肥料·植物保护 • 上一篇    下一篇

油菜黑胫病菌(Leptosphaeria biglobosa)T-DNA插入突变体表型特征分析

史志丹1, 2, 宋培玲2, 郝丽芬2, 皇甫海燕2, 燕孟娇2, 杨永青2, 吴晶2, 赵丽丽1, 李子钦1, 2   

  1. 1.内蒙古大学 生命科学学院,内蒙古 呼和浩特 010070;
    2.内蒙古自治区农牧业科学院 植物保护研究所,内蒙古 呼和浩特 010031
  • 收稿日期:2019-10-31 出版日期:2020-01-19 发布日期:2020-05-08
  • 通讯作者: 李子钦(1962—),男,研究员,博士,博士生导师,主要从事油料作物病害的研究工作。
  • 作者简介:史志丹(1993-),女,硕士,研究方向为植物病原微生物。
  • 基金资助:
    内蒙古农牧业科技创新基金项目(2017CXJJN15);内蒙古农牧业青年创新基金项目(2018QNJJN06,2017QNJJN04)

Analysis of phenotypic characteristics of T-DNA insertion mutants in Leptosphaeria biglobosa

SHI Zhidan1, 2, SONG Peiling2, HAO Lifen2, HUANGFU Haiyan2, YAN Mengjiao2, YANG Yongqing2, WU Jing2, ZHAO Lili1, LI Ziqin1, 2   

  1. 1.College of Life Sciences,Inner Mongolia University,Hohhot 010070,China;
    2.Plant Protection Institute,Inner Mongolia Academy of Agricultural & Animal Husbandry Sciences,Hohhot 010031,China;
  • Received:2019-10-31 Online:2020-01-19 Published:2020-05-08

摘要: 【目的】鉴定油菜黑胫病菌T-DNA随机插入突变体的表型特征。【方法】 通过农杆菌介导的遗传转化体系获得黑胫病菌突变体,对这些突变体的生物学特性、致病性、胞外酶进行研究。【结果】 大部分突变体的菌落形态与野生型菌株无明显差异;突变体生长速度和产孢量均低于野生型菌株,只有1个突变体产孢量显著高于野生型菌株;所测突变体中53%的突变体与野生型菌株相比,致病性无显著差异;有7个突变体致病性显著升高,突变体和野生型菌株均可分泌蛋白酶和淀粉酶,不分泌果胶酶和纤维素酶。【结论】 获得了与野生型菌株表型最为相近的突变体T34,为黑胫病菌与寄主互作机制及其致病机制研究奠定了基础。

关键词: 油菜, Leptosphaeria biglobosa, 突变体, 表型

Abstract: 【Objective】 To identify the phenotypic characteristics of random T-DNA insertion mutants in Leptosphaeria biglobosa of oilseed rape.【Methods】 L. biglobosa mutants were obtained by Agrobacterium-mediated genetic transformation system,and the biological characteristics,pathogenicity,and extracellular enzymes of these mutants were studied. 【Results】 The colony morphology of most mutants was not significantly different from that of wild-type strain. The growth rate and sporulation yield of the mutant were lower than that of the wild-type strain,and the sporulation yield of only one mutant was significantly higher than that of the wild-type strain. Compared with the wild-type strain,53% of the mutants had no significant difference in pathogenicity. The pathogenicity of 7 mutants was significantly increased. Both mutants and wild-type strains could secrete protease and amylase,but not pectinase and cellulase. 【Conclusion】 The mutant T34 with the most similar phenotype to the wild-type strain was obtained,which laid a foundation for the study of the interaction mechanism between L. biglobosa and its host and its pathogenic mechanism.

Key words: Oilseed rape, Leptosphaeria biglobosa, Mutant, Phenotypic

中图分类号: 

  • S435.654