枯草芽孢杆菌C-D6抗菌蛋白对稻瘟病菌的抑菌作用

被引:22
作者
贾书娟 [1 ,2 ]
曾大兴 [2 ]
吴小丽 [1 ,2 ]
涂国全 [1 ]
机构
[1] 江西农业大学生物科学与工程学院
[2] 深圳职业技术学院化生学院
关键词
枯草芽孢杆菌; 抗菌蛋白; 稻瘟病菌; 附着胞;
D O I
10.16409/j.cnki.2095-039x.2011.03.013
中图分类号
S435.111.41 [];
学科分类号
090401 ; 090402 ;
摘要
枯草芽孢杆菌Bacillus subtilis菌株C-D6及其发酵滤液在平板上对稻瘟病菌Magnaporthe oryzae显示明显的抑制作用。通过20%饱和度硫酸铵沉淀和Sephadex G-75凝胶柱层析分离,获得1个影响病原菌附着胞形成的抗菌蛋白,SDS-聚丙烯酰胺凝胶电泳检测发现该蛋白的分子量为32kD。显微观察发现:用该蛋白处理的孢子虽能完全萌发,但形成串珠状膨大的芽管和色浅、膨大的附着胞,并抑制芽管的正常生长。该蛋白的活性表现具有较好的热稳定性(80℃,30min)和较广的pH适应范围(5.6~9.3)。
引用
收藏
页码:362 / 367
页数:6
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