EFFECTS OF ALUMINUM ON MINERAL-CONTENT OF MYCORRHIZAL FUNGI IN-VITRO

The influence of Al3+ on the mineral content of mycorrhizal fungi was studied in vitro. Amanita muscaria (L. ex Fr.) Pers. ex Hooker whose g rowth is reduced and Lactarius piperatus (L.,. ex Fr.) S.F. Gray whose growth is stimulated by Al3+ where chosen for the experiments. 0, 0.1 , 1, and 10mM Al3+ were added as Al-2(SO4)(3) . 18H(2)O to modified M- 40 medium. Al3+ drastically affected the mineral contents of the mycel ia of both fungi: the Al, Ca, and Na contents increased while P, Mg, a nd K decreased with the increasing Al3+ concentrations in the media. O n the other hand, some important differences between the two mycelia w ere detected. In the mycelia of Lacterius piperatus grown on the contr ol media, there was about twice as much Ca content and a three times l ower P content than in the Amanita muscaria mycelia. The Al3+ content in the mycelia of Lactarius piperatus grown on 10mM Al3+ was six times higher than in Amanita muscaria at the same concentration.