葫芦科蔬菜对丛枝菌根真菌依赖性的研究

Mycorrhizal dependence of Cucurbitaceae vegetables to Arbuscular mycorrhizal fungi

摘要: 在盆栽条件下试验研究了5种葫芦科(Cucurbitaceae)蔬菜对2种丛枝菌根(Arbuscular Mycorrhiza，AM)真菌的依赖性。结果表明，AM真菌Glomus mosseae(G.m)和Gigaspora rosea(Gi.r)均能有效地促进葫芦科蔬菜的生长，显著增加叶面积和植株干物质量，提高叶片的光合速率，降低气孔阻力。供试葫芦科蔬菜对菌根的依赖程度顺序为黄瓜＞西瓜＞苦瓜＞葫芦＞南瓜。5种葫芦科蔬菜对AM的依赖性与AM真菌对根系的浸染率呈正相关关系，符合直线回归方程：y=117.19+0.7468x。

Abstract: Mycorrhizal dependence(MD)of five vegetables in Cucurbitaceae to two Arbuscular mycorrhizal fungi Glomus mosseae (G.m) and Gigaspora rosea (Gi.r) was investigated under green house conditions.Results showed that the growth,leaf area,photosynthetic rate and dry mass were significantly enhanced and the stomatal resistance was reduced by the fungi,with the order of MD of the vegetables being cucumber>watermelon>balsam pear>bottle gourd>squash.There was a positive correlation between MD and infecting rate. Its linear regression equation is:y =117.19+0.7468x.