AXENIC CULTURE OF THE MYCOBIONT OF XANTHORIA-PARIETINA IN DIFFERENT NUTRITIVE MEDIA - EFFECT OF CARBON SOURCE IN SPORE GERMINATION

Xanthoria parietina mycobiont was isolated and cultured under axenic c onditions. The development of the fungi in aposymbiotic culture depend ed on the carbon source present in the nutritive medium. The highest d evelopment was obtained with 4% glucose in LBM. Nevertheless, the majo r yield of spore germination was in BBM medium. When the sporulation p rocess was carried out in LBM (without contamination), the yield of ge rmination was very low. The results suggest that high levels of glucos e could inhibit or largely suppress germination.