茉莉酸甲酯对烟草幼苗抗病毒的影响  

Effect of Methyl Jasmonate on the Resistance of Tobacco Seedlings to TMV

作　　者：何红卫[1,2] 廖令洁[1] 肖文娟[1] 宾金华[1] 

机构地区：[1]华南师范大学生命科学学院,广东省植物发育生物工程重点实验室,广东广州510631 [2]暨南大学华文学院,广东广州510610

出　　处：《热带亚热带植物学报》2004年第3期241-246,共6页Journal of Tropical and Subtropical Botany

基　　金：广东省自然科学基金(940721;990461)资助

摘　　要：用茉莉酸甲酯处理4叶期烟草(NicotianatabacumL.)幼苗后接种烟草花叶病毒,考察发病情况和病情指数,并测定一些与抗病相关的酶活性。结果表明,茉莉酸甲酯处理后接种病毒明显降低巴西烟草的病情指数,提高几丁内切酶、β1,3-葡聚糖苷酶、SOD、脂氧酶的活性。其中仅SOD活性与抗病毒有较密切的关系。茉莉酸甲酯可能是诱导巴西烟草抗花叶病毒的信号物质。Four-leaf seedlings of tobacco were used to study the resistance to tobacco mosaic virus (TMV). After the seedlings were sprayed with 1 mg ml-1 methyl jasmonate (MJ) once a day for 3 days, then TMV was inoculated to the leaves. Among three tobacco varieties, brazil tobacco (BX) showed lower disease index than the other two (GH55 and K326). Endochitinase, β1,3-Glucanase, superoxide dismutase (SOD) and lipoxigenase activities increased in MJ-treated BX tobacco seedlings. It is suggested that MJ plays an important role in the increase of SOD and in the resistance of BX tobacco against TMV.

关 键 词：烟草 茉莉酸甲酯 烟草花叶病毒 儿丁酶 β 1 3-葡聚糖苷酶 SOD 脂氧酶 

分 类 号：S435.72[农业科学—农业昆虫与害虫防治]