低温胁迫对光蜡树膜脂过氧化及保护酶活性的影响  

Effects of chilling stress on membrance lipid peroxidation and activities of protective enzymes in Fraxinus griffithii

作　　者：徐洁[1] 魏华丽[1] 孙兵 苏金乐[1] 李雪[1] 李小康[1] 

机构地区：[1]河南农业大学,郑州450002 [2]郑州德嘉园林实业有限公司

出　　处：《河南林业科技》2007年第3期9-11,21,共4页Journal of Henan Forestry Science and Technology

摘　　要：在整个低温胁迫期间,Vc、CaCl2处理的光蜡树的MDA含量都低于对照,蔗糖处理的MDA含量高于对照。清水、Vc、CaCl2处理光蜡树的MDA含量随着SOD活性的升高而降低;蔗糖处理的光蜡树则表现相反。保护酶POD和CAT的活性在低温胁迫期间,在低温胁迫前期均逐渐升高,在达到一定的临界低温后,呈现下降趋势。研究结果表明,光蜡树的幼苗在-18℃的环境下不能安全越冬,需要一些保护措施。During the low temperature stress, MDA （malondialdehyde） content of contrast plant is higher than plant sprayed Vc, CaCl2, is lower than plant sprayed sucrose .MDA （malondialdehyde） content of plant sprayed H2O, Vc. CaCl2 lowered, with the increased activity of SOD （superoxide dimutase）; but the relation between MDA and SOD activity of plant sprayed sucrose is the opposite. The activity of POD, SOD increased gradually at earlier period of low temperature stress; then showed declining trend when the temperature attained certain critical temperature. The Fraxinus griffithii cannot safely survive the low temperature of -18 ℃ environment, needs some protective measures.

关 键 词：光蜡树 膜脂过氧化 保护酶 低温胁迫 

分 类 号：S792.41[农业科学—林木遗传育种]