以叶圆片法分析链格孢菌〔Alternaria alternata ( Fr.) Keissler〕毒素对紫茎泽兰( Eupatorium adenophorum Spreng.)
叶组织细胞膜透性、过氧化物酶( POD) 、抗坏血酸过氧化物酶( APX) 和过氧化氢酶( CAT ) 活性以及丙二醛(MDA) 含
量的影响, 结果表明, 链格孢菌毒素使紫茎泽兰叶组织细胞膜透性上升, Na +和 K +渗漏量增加, 膜脂过氧化加强,
MDA 含量上升;链格孢菌毒素处理的紫茎泽兰叶片中 POD、APX 和 CAT 的活性均较对照降低。

 

Effects of toxin in Alternaria alternata ( Fr.) Keissler on cell membrane permeability, MDA content
and activities of POD, APX and CAT enzymes of Eupatorium adenophorum Spreng .were conducted by the method of excised leaf test .The results showed that toxin increased permeability of cell membrance, leakage of K⁺ and Na ⁺, over-oxidation of cell membrane and content of MDA in E .adenophorum leaf tissue, but activities of POD, APX and CAT in treated leaves were lower than those in control leaves .