论文部分内容阅读
比较了高温胁迫过程中以黄蒿和白蒿为砧木的菊花嫁接苗和扦插苗叶片膜透性、超氧阴离子自由基O2.-产生速率、超氧化物歧化酶(SOD)和过氧化氢酶(CAT)、抗坏血酸过氧化物酶(APX)活性及可溶性蛋白质含量等的变化。结果表明:与扦插苗比较,嫁接苗叶片膜透性和O2.-产生速率较低,SOD、CAT与APX活性较高,可溶性蛋白质的含量也相对较高,而两种不同砧木的嫁接苗活性氧及抗氧酶活性等无显著差异。高温下嫁接苗叶片卷缩、萎蔫和黄化等症状均不同程度好于扦插苗。嫁接有利于菊花耐热能力的提高。
The membrane permeability, superoxide anion radical O2.- production rate, superoxide dismutase (SOD) and catalase (MDA) in the leaves of grafted chrysanthemum and the seedling of A. chrysantha were compared under high temperature stress (CAT), ascorbate peroxidase (APX) activity and soluble protein content. The results showed that compared with cutting seedlings, the leaf permeability and O2.- production rate of grafted seedlings were lower, the activities of SOD, CAT and APX were higher and the contents of soluble protein were relatively higher. However, the activities of grafted seedlings of two different rootstocks Oxygen and antioxidant enzyme activity no significant difference. Grafted leaves under high temperature curling, wilting and yellowing and other symptoms are better than cutting seedlings. Grafting is conducive to the improvement of chrysanthemum heat tolerance.