THE ROLE OF MYCORRHIZAL INFECTION IN THE RESISTANCE OF VACCINIUM MACROCARPON TO MANGANESE

The role of mycorrhizal infection in the resistance of Vaccinium macro carpon to manganese was investigated in perlite culture containing nut rient solution amended with Mn at 0, 250, 500 or 1000 mu g/ml. Shoot a nd root dry weights of the mycorrhizal plants were higher than nonmyco rrhizal plants. The mycorrhizal plants produced significantly longer m ain roots than the nonmycorrhizal plants. Differences between shoot an d root Mn concentrations of mycorrhizal and nonmycorrhizal plants aros e by reduction of Mn in the leaves of mycorrhizal plants and a corresp onding increase in root tissues.