北方农业学报 ›› 2023, Vol. 51 ›› Issue (3): 59-65.doi: 10.12190/j.issn.2096-1197.2023.03.07

• 植物保护·园艺 • 上一篇    下一篇

Bacillus megaterium L6 菌株防治燕麦炭疽病的研究

李佳乐1, 孔颢然1, 何肖石1, 郭宇航1, 牛井亨1, 东保柱1, 包海柱2,3, 韩升才1,4   

  1. 1.内蒙古农业大学 园艺与植物保护学院,内蒙古 呼和浩特 010010;
    2.内蒙古农业大学 农学院,内蒙古 呼和浩特 010019;
    3.内蒙古作物栽培与遗传改良实验室,内蒙古 呼和浩特 010019;
    4.内蒙古寒旱区作物保护工程技术中心,内蒙古 呼和浩特 010010
  • 收稿日期:2022-08-04 出版日期:2023-06-20 发布日期:2023-08-24
  • 通讯作者: 韩升才(1983—),男,讲师,博士,硕士生导师,主要从事植物病害综合防控的研究工作。包海柱(1971—),男,研究员,博士,主要从事作物遗传育种的研究工作。
  • 作者简介:李佳乐(1999—),男,硕士研究生,研究方向为植物病害综合防控。
  • 基金资助:
    内蒙古自治区自然科学基金项目(2018BS3018)

Study on the control of oat anthracnose by Bacillus megaterium L6

LI Jiale1, KONG Haoran1, HE Xiaoshi1, GUO Yuhang1, NIU Jingheng1, DONG Baozhu1, BAO Haizhu2,3, HAN Shengcai1,4   

  1. 1. College of Horticulture and Plant Protection,Inner Mongolia Agricultural University,Hohhot 010010,China;
    2. College of Agriculture,Inner Mongolia Agricultural University,Hohhot 010019,China;
    3. Inner Mongolia Crop Cultivation and Genetic Improvement Laboratory,Hohhot 010019,China;
    4. Inner Mongolia Cold and Arid Regions Crop Protection Engineering Technology Center,Hohhot 010010,China
  • Received:2022-08-04 Online:2023-06-20 Published:2023-08-24

摘要: 【目的】研究对燕麦炭疽病具有防效的生防菌。【方法】采用平板拮抗试验及促生效果盆栽试验,设置喷施清水(CK)、喷施炭疽菌孢子悬浮液、喷施Bacillus megaterium L6菌悬液和炭疽菌孢子悬浮液、喷施Bacillus megaterium L6菌悬液4组处理,利用紫外-可见分光光度计测定并计算苯丙氨酸解氨酶(PAL)活性和丙二醛(MDA)含量。【结果】亲缘关系进化树分析发现,L6菌株与Bacillus megaterium OUCMDZ4181菌株聚为一类,并鉴定为巨大芽孢杆菌(Bacillus megaterium)。通过平板拮抗试验发现Bacillus megaterium L6菌株对炭疽菌的抑菌率达89.89 %。经过Bacillus megaterium L6菌株与炭疽菌混合处理后,9 d内燕麦的MDA含量降为炭疽菌处理的28.07%,PAL活性水平较炭疽菌处理也有提高;在Bacillus megaterium L6菌株单独接种和与炭疽菌株混合接种下对燕麦植株均具有促生效果,对苗高和根长的促生率分别为15.13%、25.40%和11.06%、17.24%。【结论】Bacillus megaterium L6菌株可激发燕麦对炭疽菌的诱导抗性,且对燕麦根与苗的生长有促进作用。

关键词: 燕麦, 炭疽病, 内生菌, 诱导抗性

Abstract: 【Objective】To screen biocontrol bacteria having control efficacy against oat anthracnose.【Methods】Using plate antagonistic test and growth promoting pot test,four treatments were set up including,spraying clear water(CK),spraying anthrax spore suspension,spraying anthrax spore suspension plus Bacillus megaterium L6 suspension,and spraying Bacillus megaterium L6 suspension. The activity of Phenylalanine ammoniase lyase(PAL) and the content of Malondialdehyde(MDA)were measured and calculated by UV-VIS spectrophotometer.【Results】L6 strain and Bacillus megaterium OUCMDZ4181 were grouped together by phylogenetic analysis,and were identified as Bacillus megaterium. Plate antagonism test showed that the inhibition rate of Bacillus megaterium L6 strain to anthrax was 89.89%. After anthrax spore suspension plus Bacillus megaterium L6 suspension treatment,the content of MDA in 9 d decreased to 28.07% of that of anthrax spore suspension treatment,whereas the activity level of PAL increased compared with anthrax spore suspension treatment. Both inoculation of Bacillus megaterium L6 strain alone and combined inoculation with anthrax had growth promoting effect on oat plants,with the growth promoting rates of seedling height and root length of 15.13%,25.40% and 11.06%,17.24%,respectively.【Conclusion】The Bacillus megaterium L6 strain could stimulate the induced resistance of oat to anthrax and promote the growth of oat root and seedling.

Key words: Oat, Anthracnose, Endophytic bacteria, Induced resistance

中图分类号: 

  • S435.126