苯丙氨酸解氨酶、多酚氧化酶与甜瓜抗枯萎病的关系

Relation of Plant Phenylalanine(PAL) and Ployphenol Oxidase(PPOD) and Resistance of Hami-muskmelon to Fusarium Oxysporum F.SP.Melonis

哈密瓜抗枯萎病性不同的品系受枯萎病菌侵染后，苯丙氨酸解氨酶（ＰＡＬ）、多酚氧化酶（ＰＰＯＤ）与甜瓜品系的抗病性存在一定的相关性。接种后，ＰＡＬ和ＰＰＯＤ活性高峰不论抗感病品系均在接种后第３天出现，抗病品系的ＰＡＬ活性高于感病的品系，ＰＰＯＤ活性也高于感病的品系。

There is a certain relationship between the enzymatic activity of PAL and PPOD as well as the Hami-melon varieties of different resistance and susceptibility.After inoculation,the PAL and PPOD activity was higher in both the resistant varieties and the susceptible ones,and peaks of enzymatic activity all appear the resistant-susceptible varieties in the third day.But the PAL and PPOD enzymatic activity of the resistant varieties was higher than the susceptible ones and peaks of enzymatic of resistant varieties more slowly than the susceptible ones.