Nitrogen Fixation Activity and Genome Analysis of a Moderately Haloalkaliphilic Anoxygenic Phototrophic Bacterium .

The genome of the moderately haloalkaliphilic diazotrophic anoxygenic phototrophic bacterium A-36s isolated from an alkaline lake was analyzed and compared to the genomes of the closest species A-20s and DSM 11289. The genomic features of three organisms are quite similar, reflecting their ecological and physiological role of facultative photoheterotrophs. Nevertheless, the nitrogenase activity of the pure cultures of the studied bacteria differed significantly: the highest rate (4066 nmoles CH/mg of dry weight per hour) was demonstrated by while the rates in and were an order of magnitude lower (278 and 523 nmoles CH/mg of dry weight per hour, respectively).

Functional Diversity of Ant-Associated Bacterial Communities.

It was found that ants significantly affect the physiological activity and functional diversity of soil microbial communities, and redistribution of biophilic elements (C and N) down through the profile occurs in anthills compared to the control soil, as well as their accumulation in the underground part of the ant nests. A high urease activity was revealed in ant nests and ants. Functional dissimilarities of bacterial communities in all studied objects were determined by the miultisubstrate test.

[Role of microbiocenosis of the gastrointestinal tract in the nutrition of grouse].

In order to assess the role of the microbiocenosis of the digestive tract of herbivorous birds in transforming poor forage, the activity of cellulolytic enzymes in all departments of the gastrointestinal tract of the black grouse (Lyrurus tetrix) and Western capercaillie (Tetrao urogallus) was studied. The functional diversity of microbial communities of different departments was also investigated. In both species of birds, nitrogenase and cellobiohydrolase activities were discovered in the digestive tract, with the maximum observed in the cecum.

[Microbiological characteristic of anthills of Lasius niger].

The characteristics of microbial communities of the anthills of Lasius niger compared to the soil beyond the area of the strong effect of ants is given.