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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
【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。
【Abstract】 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.
【Key words】 Tobacco； Methyl jasmonate； Tobacco mosaic virus； Chitinase； β1,3-Glucanase； SOD； Lipoxygenase；
- 【文献出处】 热带亚热带植物学报 ,Journal of Tropical and Subtropical Botany , 编辑部邮箱 ,2004年03期
- 【分类号】S435.72
- 【被引频次】34
- 【下载频次】398