Аннотация:Microbial communities of raised bogs were mainly examined in Sphagnum moss
and peaty layers. Such choice is understandable and can be explained by the fact that
Sphagnum moss plays an essential role in raised bogs’ peat accumulating. Raised bogs
are rich in unique prostrate shrubs and herbaceous plants that are more adapted to
survival in oligotrophic conditions. These plant species have their own specificities
and decomposition rate that differs from Sphagnum. The major aim of this work was to
assess raised bogs’ prostrate shrubs and herbaceous plants’ microbial pool.
Fungi, bacteria and yeast-like cells were detected in examined plants. We found
both fungal spores and fungal mycelium. Plant species as well asits vegetative part
determined microbial population density. The fungal mycelium length
on examined plants’ leaves and stems varied from 56 to 566 m/g, the number of spores
and yeast-like cells varied from 3 to 24 million spores per gram, the bacterial number
varied from 0.5 to 4 billion cells per gram. The fungal mycelium length
and bacterial number on plant roots exceeded the same indicators on leaves and stems.
On the contrary, fungal spores and the number of yeast-like cells on plant roots was
lower than their number on leaves and stems. We established that Carex has the biggest
quantity among the majority of microorganism groups and Drosera has the smallest one.
Microbial biomass on vegetative parts of raised bog plants varied from 0.10 to 2 mg/g.
Microbial biomass calculation on leaves and stems of the majority of examined plants
gave close values. The biomass of the examined plant roots did not exceed a factor of
two. This biomass calculation proved true for all plant species except for Carex. The
microbial biomass of Carex roots was three to five times more than root biomass of
other plant species. Bacteria, fungal spores and yeast-like cells proportion
in the microbial biomass structure on leaves and stems was quite high (up to 96%), the
fungal mycelium dominated in microbial biomass structure on plant roots.