僵藕生长过程中几种酶活性的变化

CHANGES OF SOME ENZYMES ACTIVITY IN LEAVES DURING THE GROWING OF STIFF LOTUS

对僵藕生长过程中各时期叶片过氧化物酶（ＰＯＤ） 、多酚氧化酶（ＰＰＯ） 、苯丙氨酸解氨酶（ＰＡＬ） 及超氧化物歧化酶（ＳＯＤ） 的活性进行了分析． 结果表明： 僵藕的ＰＯＤ、ＰＰＯ 和ＰＡＬ 的活性均要明显高于正常藕，其中ＰＯＤ 和ＰＰＯ 均在僵藕生长的第４ 立叶出现了多于正常藕的活性高峰；僵藕的ＳＯＤ 活性显著下降，丙二醛大量积累，为正常藕的１．７～４ ．０ 倍，可溶性蛋白质含量明显降低．

The activity of some enzymes in stiff lotus leaves was studied. The results showed: PPO, POD and PAL activity were far higher than them in the healthy lotus leaves (CK), and in No.4 standing leaf, PPO and POD have an activity peak at the same time, while CK have not; SOD activity and soluble protein content in stiff lotus leaves were significantly lower than them in CK, but MDA content was 1.7~4.0 times higher than it in CK.