THE CULTIVATION OF THE MYCOBIONT OF XANTH ORIA-PARIETINA (L) TH FR ONDIFFERENT MEDIA

The growth and the development of the mycobiont of Xanthoria parietina was investigated on different media. Solid and fluid media absent of carbon sources or sources with different levels of carbon were used. W ith respect to different types of carbon sources the mycobiont showed no variations. But the growth rate depended on the concentration of th e respective carbohydrates: The higher the concentration of the sugars or poliols the earlier the mycobiont showed a vertical growth of the hyphae. Fluid media were best suited for long therm investigations. Th e mycelia showed no differentiation into different thallus-like layers even after a cultivation time of 6 to 12 month. After a 6 to 12 month growing period only the central hyphae of the mycelia were characteri zed by a higher density.