Microbial phyllosphere complexes as status indicators of tree stands- edificators

The aim of the research was to study the for-mation of microbial phyllosphere complexes in coe-notic, population and species levels as indicators of tree stands- edificator under different external influ-ences. In the analysis of microflora phyllosphere tree stands were Dorokhovsky (zone of intensive effect HES) and Zakharinsky (70- 80 km from HES) pinery found that the number of microbial cells in 1 g of pine needles in the Dorokhovsky forest twice more than in the Zakha-rinsky. Significant differences were observed in the qualitative composition of microorganisms. Epi-phytes of Zakharinsky pinery are represented by 96 % non-spore Gr-bacteria, similar in taxonomic posi-tion of the genus Pseudomonas. In Dorokhovsky pinery epiphytes comprise 70 % pigment forms. The number of epiphytic microorganisms of cul-tures of pine and larch in the area of active techno-genesis exceeds that of the control plot is almost 7-9 times. Here sporeforming bacteria predominate (92 % to 96 % pine and larch), and the control plot of pine cultures - asporogenous form (90 %). In the study the area (Lower Angara) a black fir sawyer beetle carried a complex of blue stain fungi pre-sented species Ophiostoma curvicollis, Ophiostoma sp.and Leptographium sp. The total frequency of occurrence of this complex in the passages of the pest reached 90-100 % in test plots in defoliation by silkworm tree stands and does not exceed 60 % in the control plot in the undisturbed tree stand. The investigation of species composition and abun-dance miсromycetes of bark of spruce and fir shows the dependence of these parameters on the type and degree of defoliation of the crown of the plant host, and thus may be an adequate indicator of the condition of the tree in the early stages of its lesion. The analysis of microflora of healthy and diseased needles of Scots pine and Siberian spruce in forestry indicates that mycelium fungi are its permanent inhabitants but presented in a differ-ent ratio to the prevalence in the diseased needles, which phytoncide activity is reduced.