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中国生物防治学报 ›› 2018, Vol. 34 ›› Issue (1): 156-162.DOI: 10.16409/j.cnki.2095-039x.2018.01.019

• 研究简报 • 上一篇    

枯草芽胞杆菌YB-05对小麦全蚀病菌胞内酶活的影响

孙润红1, 徐俊蕾1, 杨丽荣1, 张洁1, 夏明聪1, 武超1, 薛保国1, 吴坤2   

  1. 1. 河南省农业科学院植物保护研究所/河南省农作物病虫害防治重点实验室/农业部华北南部农作物有害生物综合治理重点实验室/河南省作物保护国际联合实验室, 郑州 450002;
    2. 河南农业大学生命学院, 郑州 450002
  • 收稿日期:2017-06-26 出版日期:2018-02-08 发布日期:2018-02-06
  • 通讯作者: 薛保国,研究员,E-mail:13613714411@163.com;吴坤,教授,博士生导师,E-mail:wukun63@126.com
  • 作者简介:孙润红,博士,助理研究员,E-mail:sunrunhong_2007@163.com
  • 基金资助:
    河南省农业科学院科研发展专项资金(201513117);河南省博士后基金(2015107);小麦主要病虫害绿色防控产品的研发与产业化(141100111100);河南省基础与前沿基金(162300410156)

Effect of Bacillus subtilis YB-05 Fermentation Broth on Gaeumannomyces gramini Enzyme Activities

SUN Runhong1, XU Junlei1, YANG Lirong1, ZHANG Jie1, XIA Mingcong1, WU Chao1, XUE Baoguo1, WU kun2   

  1. 1. Henan Key Laboratory of Crop Pest Control/Key Laboratory of Integrated Pest Management on Crops in Southern Region of North China/International Joint Research Laboratory for Crop Protection of Henan/Biological Pesticides Engineering Research Center of Henan Province/Institute of Plant Protection, Henan Academy of Agricultural Sciences, Zhengzhou 450002, China;
    2. College of Life Sciences, Henan Agricultural University, Zhengzhou 450002, China
  • Received:2017-06-26 Online:2018-02-08 Published:2018-02-06
  • About author:10.16409/j.cnki.2095-039x.2018.01.019

摘要: 小麦全蚀病菌是影响小麦产量和质量的主要致病菌之一,前期研究表明枯草芽胞杆菌YB-05对小麦全蚀病菌的生长具有抑制作用。本试验拟通过研究该菌对小麦全蚀病菌相关酶系的诱导变化情况,解析其对小麦全蚀病菌的抑制作用机理。本试验以小麦全蚀病菌Gaeumannomyces gramini(Sacc.)Arx et Oliver var. tritici(Sacc.)Walker为靶标菌,加入终浓度为MIC50枯草芽胞杆菌YB-05发酵液,通过显微镜观察菌株YB-05发酵液对小麦全蚀病菌菌丝结构和形态的影响,通过酶活力测定检测菌株YB-05发酵液对小麦全蚀病菌胞内苯丙氨酸解氨酶(PAL)、过氧化物酶(POD)、过氧化氢酶(CAT)、多酚氧化酶(PPO)和超氧化物歧化酶(SOD)防御酶活的影响,同时检测菌株YB-05发酵液在离体/活体条件下对小麦全蚀病菌线粒体复合酶Ⅱ/Ⅲ活力的影响。小麦全蚀病菌经菌株YB-05发酵液处理后,显微镜观察到其菌丝变粗、断裂,顶端膨大,分枝增多;处理8 d后,胞内的PAL、POD、CAT、PPO和SOD活性比对照依次高24.52%、72.67%、81.81%、80.36%和112.48%;离体条件处理,线粒体复合酶Ⅱ和Ⅲ的活性与对照组相比差异不显著,而活体条件处理下差异显著,线粒体复合酶Ⅱ和Ⅲ分别比对照组分别降低43.95%和55.87%。菌株YB-05发酵液通过结合小麦全蚀病菌线粒体复合酶Ⅱ和Ⅲ的相关基因,从而影响该基因的表达,抑制小麦全蚀病菌线粒体复合酶Ⅱ和Ⅲ的活力,影响小麦全蚀病菌的呼吸,进而导致抑制小麦全蚀病菌菌丝畸变,从而影响小麦全蚀病菌的正常生长。

关键词: 枯草芽胞杆菌, 发酵液, 小麦全蚀病菌, 防御酶活性, 线粒体复合酶Ⅱ和Ⅲ酶活性

Abstract: Wheat take-all pathogen is one of the main pathogenic funguses which exert influences on yield and quality of wheat, there have previous studies to prove that biocontrol strain B. subtilis YB-05 inhibits the growth of wheat take-all pathogen. This study intended to study the changes of the related enzymes in wheat take-all pathogen which were induced by B. subtilis YB-05, and explored the inhibition mechanism of B. subtilis YB-05 fermentation broth against wheat take-all pathogen. Wheat take-all pathogen was treated with B. subtilis YB-05 fermentation broth which the concentration reached MIC50, the effects of B. subtilis YB-05 fermentation broth on mycelium structure and morphology of wheat take-all pathogen were observed by microscope; CAT, POD, PPO, SOD and PAL activity of wheat take-all pathogen were detected through enzyme activity assay, at the same time the enzymatic activities of mitochondrial enzyme complexes Ⅱ and Ⅲ of wheat take-all pathogen in vitro/vivo were studied. The results showed that B. subtilis YB-05 fermentation broth resulted in aberrant growth of wheat take-all pathogen; The enzymatic activities of PAL, POD, CAT, PPO and SOD in wheat take-all pathogen treated with B. subtilis YB-05 fermentation broth for 8 day were 24.52%, 72.67%, 81.81%, 80.36% and 112.48%, lower than the control group, respectively; The enzymatic activities of mitochondrial enzyme complexes Ⅱ and Ⅲ were not changed significantly with the control in vitro. However, the enzymatic activities of mitochondrial enzyme complexes Ⅱ and Ⅲ were lower 43.95% and 55.87% than the control group in vivo, respectively. B. subtilis YB-05 fermentation broth affected the gene expression by combining the related genes of mitochondrial enzyme complexes Ⅱ and Ⅲ in wheat take-all pathogen, and then reduced the respiratory metabolism of wheat take-all pathogen by inhibiting the mitochondrial enzyme complexes Ⅱ and Ⅲ enzymatic activity, and finally caused the growth inhibition.

Key words: Bacillus subtilis, fermentation broth, wheat take-all pathogen, activities of defensive enzyme, mitochondrial enzyme complexes Ⅱ and Ⅲ enzymatic activity

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