ACQUISITION OF PHOSPHORUS BY VA-MYCORRHIZAL HYHPAE FROM THE DENSE SOIL

In order to investigate the capability of VA mycorrhizal hyphae to take up phosphorus from the soil with high density, a model experiment was conducted under controlled condition. The pots used had three compartments, one central compartment with optimal soil density, and two outer ones varying in soil density. Red cloveR was grown in the central compartment inoculated or uninoculated with VA mycorrhizal fungus Gmosseae. The results of experiment showed that mycorrhizal infection had no effect on phosphorus uptake of the host plant at low soil density, wheresa both phosphorus and shoot growth were increased by mycorrhizal infection at the high soil densities, suggesting that VA mycorrhizal hyphae was able to absorb phosphorus from the dense soil location where the host roots could not access.