作　　者： ; ; ; ; ;

机构地区： 南京农业大学生命科学学院

出　　处： 《植物病理学报》 2004年第1期55-60,共6页

摘　　要： 本文研究了一个新分离纯化的链格孢菌毒素对恶性杂草紫茎泽兰叶片的致病作用与叶片光合作用抑制的相关性。 结果表明:在毒索处理叶片的形态产生明显变化之前,光合放氧速率和表观量子效率均明显降低。进一步的研究表明其作 用位点在类囊体膜上,主要抑制了2个光系统的电子传递活性,但对于色素含量、暗反应关键酶则没有显著的影响。 The relationship between the pathogenicity of a new toxin extract from Alternaria alternata (Fr. ) Keissler infecting crofton weed (Eupatorium adenophorum Spreng) that is one of the most troublesome invasive weeds and its inhibition on photosynthesis was studied. The results showed that the toxin extract greatly inhibited oxygen evolution rate and appearance quanta efficiency declined evidently before any distinct change in leaf appearance was observed. The main action site of toxin in chloroplast was on thylakoid membrane. It inhibited electron transfer reaction of two photosystems. The toxin did not affect prominently photosynthetic pigment content and RuBP carboxylase level and activity.

关 键 词： 链格孢菌毒素 紫茎泽兰叶片 光合作用 光合放氧速率 表观量子效率

领　　域： [农业科学] [农业科学] [农业科学]