不同品种花生接种条纹病毒后叶片内过氧化物酶和超氧化物歧化酶的变化

对３个感病程度不同的花生品种的研究表明，接种后各品种花生植株叶片内ＰＯＤ活性明显提高，随着症状的出现，ＰＯＤ表现出显著的活性高峰，并出现了４条新的同工酶带，而原有的１条迁移率为０．３８的谱带消失。接种初期，花生叶片内ＳＯＤ活性有所提高，但高感品种接种８ｄ后ＳＯＤ活性低于健康对照，而耐病品种接种后１２ｄ才略低于对照。各处理之间ＳＯＤ同工酶谱带数相同，发病株的迁移率为０．４１的谱带较弱。

Changes of POD and SOD in Peanut Leaves after Inoculation with Peanut Stripe Virus

Activities and isozymes of peroxidase and superoxide dismutase were investigated with leaves of three peanut cultivars with different susceptibility to PStV after inoculation. For all tested cultivars, infection of PStV resulted in an increase in POD activity.Associated with symptom development ,the POD activity increased greatly and additional isoperoxidase bands appeared while the M 2 bands (Rf=0 38), existing in leaves of healthy peanut plants, became slight or disappeared in infected plants leaves. In the first few days after treatment, SOD activity in leaves of infected plants increased.Eight days after inoculation, SOD activity in the high susceptible infected plants was lower, while 12 days after inoculation, SOD activity in the tolerant infected plants was a little lower than those of healthy ones. There is no difference in the numbers of SOD isozyme bands among treatments, but the M 2 bands (Rf=0 40)were slighter in infected plants than that in healthy plants.