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《ACTA PRATACULTURAL SCIENCE》 1998-03
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Phosphorus Transfer Via VA Mycorrhizal Hyphal Links between Rye Grass and Red Clover

Ai Weidang Zhang Junling Li Long Li Xiaolin (Department of Plant Nutrition, China Agricultural University, 100094)  
A five-compartment system was used to examine 32 P transfer via vesicular-arbuscular mycorrhizal hyphal links from rye grass to red clover. Mycorrhizal fungus Glomus mosseae was inoculated in the root compartment for donor rye grass plant at the beginning of the experiment. The rye grass donor plants were supplied with 32 P (NaH 2 32 PO 4) six weeks after planting, by labeling part of the donor roots induced out of the root compartment. After two weeks, the plants were harvested. The results showed that mycorrhizal hyphae not only can interconnect the roots of the donor rye grass and the receiver red clover in the mycorrizal controls, but also transfer 32 P from rye grass to red clover. Although 32 P transferred was significantly high in the mycorrizal controls compared to the non-mycorrizal controls, the net amount of 32 P transferred was small since P was also transferred in the reverse direction. Moreover, the amount of 32 P transferred decreased with an increased level of P used in the receiver root compartment and the outer compartment. The role of P transferred via hyphal links to the receiver plants was still unknown.
【Fund】: 国家自然科学基金
【CateGory Index】: S541,S543.6
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