Occurrence and Distribution of Communities in the Root Zone in a Post-Bog Permanent Meadow in Relation to Mineral Fertilization and Growing Seasons.

The present study is the first report of a detailed analysis of the frequency of and genera related to colonizing the root zone of clovers and grasses growing in a permanent meadow established on peat-muck soil in a post-bog habitat. The isolation of fungi was carried out on the Nash and Snyder medium with the plate dilution method. The taxonomic identification of the collection of pure fungal cultures was based on morphological features revealed by macroscopic and microscopic observations. The species dominance coefficients, Marczewski-Steinhaus and Simpson species diversity index were calculated. Eight complexes were distinguished. The distribution of the population was uneven, which was generally reflected in a higher frequency of the species complex in the clover root zone and , from the species complex, and from the . species complex in the grass root zone. The highest similarity of fungi was determined in the rhizoplane and the endorhizosphere. The highest species diversity and the highest population size were determined in the rhizosphere soil. The fertilization treatment reduced the growth rates in the sensu lato and in genera related to , as evidenced by the decrease in the total abundance and species richness. The root colonization by the , especially the species complex, was not accompanied by plant pathologies, which suggests a saprotrophic and endophytic rather than parasitic character of the relationships with the plant host.