菌根真菌感染墨兰与建兰根状茎对呼吸速率和几种氧化酶活性的影响

Effect of Mycorrhizal Infection on Respiration and Activities of Some Oxidase in Rhizome of Cymbidium sinense and C.ensifolium

摘要:

用从野生建兰根部分离的菌根真菌P15菌株感染墨兰Cymbidiumsinense和建兰Cymbidiumensifolium的根状茎后,使寄主的呼吸速率、细胞色素C氧化酶、过氧化物酶活性明显增高,而感染前后IAA氧化酶活性变化不明显。两个品种相比较,建兰根状茎的呼吸速率、细胞色素C氧化酶和过氧化物酶活性均比墨兰的高,但墨兰的根状茎IAA氧化酶活性则高于建兰。

Abstract:

Endophytic mycorrhizaI fimgus P15 isolated from the roots of wild Cymbidium e nsifolium was used to infect the non-mycorrhizal rhizomes of C．sinense and C. ensifolium. A marked increase in respiratory rate，cytochrome C oxidase activity，and peroxidase activity was shown in the rhizomes of two infected species，while the change in IAA oxidase activity was slight．The levels of respiratory rate，activities of cytochrome C oxidase and peroxidase in the rhizomes of C. ensifolium, were all higher than those of C. sinense before or after infection, but the IAA oxidase activity showed the contrary．