Биология

Represented are the results of assessment regarding abundance rates and spatial structure of little souslik settlements situated in the territory of the North-Western Caspian-Sea Region. Investigated are the factors affecting the spatial structure of its settlements in the territory of the Ergeninsk Upland, Sarpinsk and Caspian Depressions.

The goal of this research was lipid peroxidation process assessment for different levels of ultrahigh frequency electromagnetic field and different time exposure. There were animal 171 MHz one time exposures during 1 and 3 hours. In the blood serum of exposed animals the malondialdehyde concentration evaluated the lipid peroxidation process. The research results shown the statistically significant electromagnetic field biological effects as for maximum field strength 1 hour exposure, as lower field strength 3 hours exposure.

The article presents the results of work on preservation of plant tissues and organs of rare and endangered species in conditions of slow growth. Special attention is paid to modeling objects, Silene cretacea and Potentilla volgarica – obligate calcifythes enlisted in the Red book of the Russian Federation. Slower growth of the explants was provided by reducing the cultivation temperature to +5±1 C and introducing into the nutrient medium of osmotic (sucrose 30, 60 or 90 g/l), retardant (chlorcholinechloride) and/or sorbent (activated carbon).

The morphological variability in populations of Chondrilla was subject to the numerical analysis using the unweighted pair group method with arithmetic mean (UPGMA). The study showed that out of the seven species of the genus found in European Russia, it is only C. ambigua that has the status of undoubted species. A distinct difference is observed between the two groups of populations: the first group comprising C. juncea, C. latifolia, C. brevirostris, and the mixed population of C. juncea/graminea; and the second group comprising the populations of C. graminea and C.

The article describes basic stages of creation and development the Herbarium of Lobachevsky State University of Nizhni Novgorod (NNSU), since the 20-s of the last century, shows the main areas of floristic researches. Designated the current status of the Herbarium. Given a list of the main species of plants described from the territory of the region. The necessity of the search and identification of authentic samples is shown. Results of revision on the type in the in the Herbarium of Lobachevsky State University of Nizhni Novgorod (NNSU) are psesented.

The article presents the results of the roses hybrid introduction. The results of the research on the formation and development of shoots of five sorts of roses that refer to garden group Austins selection in the conditions of the «Botanical Garden» Education and Research Ctnter are presented. The features of the relation of generative and vegetative shoots has been studied as decorative signs. We have studied the ability of the sorts to the resumption of bush size after winter period.

The complex estimation of toxicity of the polymer compounds – poly azolidin ammonium, modified hydrate ions of iodine, which has high antimicrobial activity was held. It is established that working concentrations of parent drug and its variants with different hydrate ions of iodine content do not cause death of biotestobjects of Daphnia magna Straus.

In current research the optimization of culture conditions Azotobacter vinelandii D-08 on nutrient mediums with different content of molasses – 20, 30, 40 and 50% (by weight) was conducted. It is established that the maximum accumulation of polysaccharides was 13,78 g/l and it was observed at growth of the strain on the medium containing 50% molasses for 72 hours. The results of the method of gel permeation chromatography showed that the obtained polysaccharide has a molecular weight of 0.93532 kDa and 312.5014 kDa.

Macrozoobenthos assay carried out in hyperhaline waterbodies (Gor’kaya river and Lake Baskunchak littoral) of Bogdino-Baskunchakski nature reserve yielded 14 taxa: bugs – 3 (from family Corixidae: Cymatia rogenhoferi (Fieber, 1864), Paracorixa concinna (Fieber, 1848) and Sigara assimilis (Fieber, 1848)), chironomids – 2 (Baeotendipes noctivaga Kieffer, 1911, Orthocladius sp.), other dipterans – 4 (Limoniidae, Dolichopodidae, Ephydridae and Tabanidae (род Chrysops) larvae), beetles – 5 (Dytiscidae: Cybister (s.

Provides information about finding new species of flora of the Saratov region Hibiscus triynum and Thesium moesiacum, and clarifies the distribution of rare in the Saratov region Sonchus palustris and Conringia orientalis.