芸苔链格孢菌毒素对白菜细胞膜透性、SOD酶和POD酶活性的影响  

THE EFFECT OF AB TOXIN FROM Alternaria brassicae ON MEMBRANE PERMEABILITY AND THE ACTIVITIES OF SOD AND POD IN CELL OF CHINESE CABBAGE LEAVES

作　　者：董金皋[1] 樊慕贞[1] 韩建民[1] 刘书华[1] 曹丽慧 

机构地区：[1]河北农业大学植病系,保定071001

出　　处：《植物病理学报》1999年第2期138-141,共4页Acta Phytopathologica Sinica

摘　　要：本文以白菜幼苗为材料，研究了芸苔链格孢菌毒素（ＡＢ－ 毒素） 对白菜叶片细胞膜透性及叶片内ＳＯＤ 酶、ＰＯＤ 酶活性变化的影响。结果表明，白菜叶片用ＡＢ－ 毒素处理后，细胞膜透性增大，且随处理时间的延长和毒素浓度的增加而增高。不同白菜品种用毒素处理后膜透性的改变与病菌接种的发病程度呈正相关，即电导率大的白菜品种，叶片发病也重。试验结果还发现，芸苔链格孢菌及其毒素处理白菜后，体内ＳＯＤ 酶和ＰＯＤ 酶活性的变化基本趋于一致，即处理后１２ ｈ 内急剧下降，然后（１２ ～４８ ｈ） 活性上升。而对照处理基本变化不大。可见。AB toxin produced by Alternaria brassicae could increase the membrane permeability in cell of Chinese cabbage. Results showed that there was a positive correlation between the susceptibility to A.brassicae and the change of permeability in cells of different varieties: the higher the conductivity was, the bigger the lesion was on leaf. Results also showed that the changes in activities of SOD and POD in cell were similar. Both of them decreased rapidly within 12 h after treatment and then increased between 12 h to 48 h after treatment. However, there was no significant change in control.Therefore,as A.brassicae ,AB toxin can induce the disease on Chinese cabbage.

关 键 词：芸苔链格孢菌 毒素 膜透性 酶活性 白菜细胞 SOD 

分 类 号：S432.42[农业科学—植物病理学] S436.34[农业科学—农业昆虫与害虫防治]