Research on the Retardation of Defoliation and the Ripening Promotion of Leguminous Plants Accompanied with VA mycorrhizal Formation

1)根据Schenck手册方法对我校农田采集的孢子进行鉴定，90%以上的VA菌根真菌可能属于Glomus和Acaulospora，其中Glomus sp. （etunicatum like）对豆科植物豇豆的生长和养分吸收具有相当高的促进能力。鸽豆和花生——在安安区土壤肥力相对较高和较低的两种条件下。VA菌根的形成明显地延缓了这些豆科植物的落叶，促进了它们的成熟。2)在施磷量充足的安土中，黄豆根瘤活性在成熟阶段保持较高水平，这是由于上述菌丝体在安土中形成的VA菌根导致籽粒蛋白质含量较高。3)青豆菌根侵染后，成熟期大豆木质部汁液和叶片中细胞分裂素（尤其是核糖素）含量比未侵染的高近2 ~ 4倍。

1)Mail' genera more than 90% - of VA mycorrhizal fungi may belong to the Glomus and Acaulospora according to the identification of spores collected from our university farm field due to the method of Schenck's manual, in which one species of Glomus sp. (etunicatum like)has a quite high ability to promote the growth and nutrient uptake of leguminous plants - cowpea. pigeonpea and groundnut - under the both conditions of relatively high and low fertilities of an An(losoil. The retardation of the defoliation and the promotion of ripening of these legumes due to VA mycorrhizal formation were clearly observed.2)The nodule activity in ripening stage of soybean maintained high level due to VA mycorrhizal formation by Gloms sp. (ettinicattim like)mentioned above in an Andosoil with enough level of phosphorus application resulted in also high protein content in grain.3)The contents of cytokinin, especially ribosylzeatin, in xylem sap and leaves at ripening stage of soybean infected with Glomus sp. (etunicatum like)were nearly double-fotir times higher than that without YA mycorrhizal infection.