典型盐地植物细胞脂质过氧化伤害与质膜超微结构变化的研究

典型盐地植物盐琐琐（Ｈａｌｏｃｎｅｍｕｍｓｔｒｏｂｉｌａｃｅｕｍ）、盐爪爪（Ｋａｌｉｄｉｕｍｆｏｒｉａｔｕｍ）和盐角草（Ｓａｌｉｃｏｒｎｉａｅｕｒｏｐａｅａ）在盐渍环境下细胞内脂质过氧化产物丙二醛（ＭＤＡ）增加，相应的超氧化物歧化酶（ＳＯＤ）也同样增加，且ＳＯＤ含量总保持比ＭＤＡ高１．２倍左右。质膜超微结构的特点是：内陷形成波浪状和在质膜下出现一些泡状结构，有的甚至在质膜下形成一泡状结构分布层。这些都是盐渍造成伤害的表现和标志，但由于细胞抗氧化机能的增强，结构修复的加快，使它们能抵抗高盐的胁迫，保持正常的生命活动。

THE STUDY ON CELL LIPID OVER-OXIDATION INJURIES AND CHANGES OF PLASMALEMMA ULTRASTRUCTURE IN TYPICAL SALINE PLANTS

Under the saline environment,in the cells of saline plants such as Halocnemum strobilaceum,Kalidium foriatum and Salicornia europaea,MDA,the product of lipid over-oxidation,increas-es,and SOD increases correspondingly.The SOD content is always 1.2 time higher than MDA.The characteristics of the plasmalemma ultrastructure is as follows:the plasmalemma is of wavewrinkle;there is vesicular structure every a distribution layer of vesicular structure below the plas-malemma.These can be regarded as an indication and symbols of saline injuries,but the typicalsaline plants enhance their ability of oxidation-resistance and renovate the structure quickly,sothat they can resist high saline stress and fanction properly.