摘要
研究甘蔗低温胁迫与膜脂过氧化关系的结果表明,随着处理温度的降低和低温处理时间的延长。甘蔗叶片脱氢酶活性不断下降;伴随着超氧物歧化酶(SOD)活性的下降,甘蔗叶片膜脂过氧化产物丙二醛(MDA)含量不断增加。质膜透性增大。由此可见,膜脂过氯化是甘蔗低温胁迫伤害的重要原因之一,甘蔗抗寒性强弱与其体内能否维持较高水平的 SOD 活性有关.
The correlation between low temperature stress and peroxidation of membrane lipid in leaves of sugarcane was studied.The results showed that the activities of dehydrogenase and superoxide dismutase decreased while MDA content and membrane permeability increasd under stress of low temperature,The increments of MDA and mem- brane permeability were correlated with the decreased level of superoxide dismutase under stress of low temperature,This investigation provides a direct evidence for that the peroxidation of membrane lipid is closely related to the cold injury and that superoxide dismutase activity is closely related to the cold resistance of sugarcane.
关键词
甘蔗
低温胁迫
膜脂过氧化
灾害
sugarcane
low temperature stress
peroxidation of membrane lipid
superoxide dismutase
