species diversity of epigenous yeast communities of biogeocenoses in azerbaijan

The results of the long term research on the number and the species composition of the phyllosphere’s yeasts (epigenous yeasts) of the plants in the northern, southern and subtropical regions of the Republic of Azerbaijan have been generalized. The obtained results show that the number and diversity of the yeast communities naturally decrease in different substrates, which correspond to different stages of the plants development. A set of dominant species is characteristic for each stage of the development. High yeast diversity is peculiar to forest biogeocenos rather than other ones. We identified 48 types of yeasts in phyllosphere and associated substances, 35 of which we were able to identify by morphological and physiological characteristics. Most of the identified yeasts were minor species, whose occurrence did not exceed 0.5% of the total specified yeasts. The results show that only 25 species of yeasts are permanent habitants of phyllosphere and alltogether they account for 90 % of the total yeast population.