不同温度对马蹄金生理生化特征的影响

The Effect of Temperature on Physiological and Biochemical Characteristics of Creeping Dichondra (Dichondra repens Forst.)

在不同温度处理下,马蹄金叶片中还原糖含量、可溶性蛋白质含量、丙二醛(MDA)含量、超氧化物歧化酶(SOD)活性、过氧化物酶(POD)活性和过氧化氢酶(CAT)活性均发生明显的变化。结果表明,在温度胁迫下,马蹄金叶片中还原糖含量均增加;可溶性蛋白质含量在低温胁迫下呈下降趋势;MDA含量在-5℃时最大,在其他温度下均低于对照,随温度处理时间的延长MDA含量逐渐增加;SOD、POD和CAT活性在温度胁迫下均下降,但在0℃时SOD和POD活性上升。

Under the treatment of different temperature, we compared the contents of deoxidize carbohydrates, soluble protein, MDA and the activity of SOD, POD, CAT in leaf of creeping dichondra. The results showed that under temperature stress, the content of deoxidize carbohydrates in leaf increased; however, the content of soluble protein decreased. At-5℃, we got the highest content of MDA. At other situation, the content of MDA is lower than that at 25℃. However, after we elongated the treating time, the content increased. The activity of SOD, POD and CAT decreased under temperature stress except for SOD and POD at 0℃.