Home – Home – Jornals – Flora and Vegetation of Asian Russia 2014 number 4

Inter-simple sequence repeats (ISSR) markers of genomic DNA were used to assess the genetic diversity in six popu- lations of Astragalus sericeocanus - rare endemic species to the shore of Lake Baikal. Five primers amplified 91 bands with 86 (94.1 %) being polymorphic. A low level of genetic similarity among population Turka and other populations was detected, based on the Nei’s distance (0.145). The low genetic connectivity was found among population Turka and other populations is an evidence of enough long-term insulation this population on the eastern coast of Lake Baikal. Based on these results the conservation strategy of Astragalus sericeocanus was proposed.

The anatomy of the leaf Gueldenstaedtia monophylla in five natural populations of Central Altai has been studied. It is found that the Gueldenstaedtia monophylla leaf has izopalisade structure that reflects its xerophytic nature. Learned anatomical features have low levels of variability (less than 20 %). A considerable similarity in the structure of the leaves in plants from different populations was defined.

Variation of morphological characters in Elymus gmelinii in comparison with variability in E. ciliaris s. l. and E. pendulinus s. l. was studied. As well as other species of the StY-genome group E. gmelinii includes set of differing morphotypes, but unlike E. ciliaris and E. pendulinus remains homogeneous taxonomically, without recognition intraspecific taxa and separate species. The analyses of a series morphological characters has shown, that distinctions between populations of E. gmelinii from different place of the area cannot be used as basis for recognition of independent species. More adequate approach for systematisation of the genus Elymus provides a complex of methods for delimitation between independent species.

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.