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Information about the mycorrhization species of Carex L. ( Cyperaceae ) were accumulated from 60 sources and were analyzed. There are 172 species of sedges that have ever been studies for the presence of arbuscular mycorrhiza. In 97 species (56.5 %) mycorrhiza is not found; the 23 species (13.5 %) mycorrhiza is found always; 52 species (30 %) may form or do not form mycorrhiza. The share of species of Carex , in respect of which shows the ability to form mycor- rhiza, increases with the increase of the number of research.

At the base of the Russian Arctic biodiversity monitoring network comparative study of latitudinal structure spectra of 137 local and 6 regional floras from 3 sectors of Asian Arctic was performed. Levels of similarity latitudinal struc- ture spectra by groups and by fractions were calculated, territories with similar spectra were shown at the schematic maps and compared with existing subzonal division of tundra zone. 3 latitudinal types of local floras (arctic, boreal, hypoarctic) and within the arctic type 3 subtypes (high arctic, proper arctic, hypoarctic) were distinguished. Com- parison of latitudinal structure of regional floras, calculated in 2 different ways: ratios obtained from total lists of species for each subprovince and ratios obtained after normalizing the lists by frequencies of species in local floras in given subprovince. The latter is shown to be more correct. Most similar to each other are regional floras with similar sets of subzonal units, though they may be located in different longitudinal sectors.

Vegetation in the special hilly area nearby Uglitskiy Village (steppe zone of Chelyabinsk oblast) was carefully investigated, their ecological-floristic classification was implemented, 3 new subassociations were described. Spatial pattern of plant community distribution was shown, forest-steppe characters of vegetation were proved. Reasons for the existence of isolated forest-steppe enclave in steppe zone were discussed.

Cirsium helenioides (L.) Hill. (Asteraceae) is the long-lived short-rhizome herbaceosus polycarpic plant, one of the dominant plant in tall-herbal meadows in Salair Ridge. The ontogenetic structure and density of 10 coenopopulations of C. helenioides in the tall-herbal meadows in Salair Ridge was studied. The coenopopulations is normal type, young, mature or aging, full-member and not full-member. The maximum coenopopulations density for young and the minimum density for aging coenopopulations is registered. The seedage of C. helenioides in tall-herbal meadows is irregular. It is shown that C. helenioides in this type of meadows is the temporary successional dominant.

The results of identification of viruses Bean yellow mosaic virus and Cucumber mosaic virus , identified from vegetable legumes culturales and pumpkin vegetable plants. The possibility of using 2b gene of CMV as a marker for PCR di- agnostics. The study of nucleotide sequences of isolates of CMV and comparative phylogenetic analysеs of isolates from GenBank, showed that the Khabarovsk isolates of CMV consists of subgroup in the IA group I.

The data on the biodiversity of freshwater algae from Timpton River basin (southern Yakutia) are presented. In study water bodies 175 species of algae belonging to the six divisions are found. Algal communities composition were considered, short ecological and geographical analysis of the flora was made. The estimation of water quality by the Pantle-Buck’s method in the modification by Sladecek was made, according to this assessment all streams of the basin assigned to II class of water cleanliness.

The аssessment of the status of populations of fi ve P. fruticosa (L.) O. Schwarz by comparing the organismic and population parameters have been maked. The coenopopulations in the meadow steppe and subalpine meadow are in the optimal condition. Conditions of the small-turf steppe, pebbly flood plain and the alpine meadows are unfavorable for P. fruticosa , which causes a reduction or organismic, or population parameters.

Species composition of genus Pedicularis section Pharyngodon in Asiatic Russia was updated. Analysis of morphological features for the species of this section was made. Characteristics of life form, leaves, calyx, corolla, friut are diagnostic on section level. Features of root leaves and bracts, inflorescens are diagnostic on series level. Key for species determination is presented. Conspect of section Pharyngodon in Asiatic Russia is represented by 6 species belonging to 3 series. New series Pennelianae I.V. Han including arctic species with larger bracts and dense inflorescens is described. Latin diagnosys for series Aduncae previously described by A.I. Vvedensky in Russian is given. The location of type materials for 3 species was specified. Distribution of all species in Asiatic Russia is refi ned.

Morphology generative shoots of female and bisexual plants and the sexual structure of forest populations Origanum vulgare L. were investigated, morphological features of female and hermaphrodite flowers species were studied.