莲子草假隔链格孢毒素对空心莲子草根尖组织防御酶活性的影响

Effects of Vulculic Acid on the Activities of Defense Enzymes of Alternanthera philoxeroides

研究了莲子草假隔链格孢Nimbya alternantherae毒素2-乙酰基-3,4-二羟基-5-甲氧苯基-乙酸(Vulculic acid)对空心莲子草Alternanthera philoxeroides根尖组织防御酶活性的影响.结果表明:Vulculic acid能够引起空心莲子草根尖组织防御酶活性发生变化,在处理初期,细胞内过氧化氢酶(CAT)、抗坏血酸过氧化物酶(APX)、过氧化物酶(POD)、多酚氧化酶(PPO)的活性均低于对照,而苯丙氨酸解氨酶(PAL)、超氧化物歧化酶(SOD)的活性高于对照.

The activities of catalase （ CAT）, ascorbic acid peroxidase （ APX）, peroxidase （ POD ）, polyphenol oxidase （PPO） , phenylalanine ammo-nialyase （ PAL）, superoxidedismurse （ SOD ） in the root tip tissues of alligatorweed, Alternanthera philoxeroides, treated with vulculic acid from Nimbya alternantherae were analyzed. The results showed that the toxin could result in the activity change of defense enzymes in the root tip tissue of alligatorweed. The activities of CAT, APX, POD, PPO in tissues treated were lower than that of controls respectively in initial stages after treatment, while the activities of PAL and SOD were higher than those of controls.