Biology

Features of in vitro Cold Storage of Some of Rare and Endangered Plants of Saratov Region

Authors: Kritskaya T. A., Kashin A. S.

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). It is established that the deposition of S.

The Malondialdehyde Assessment in the Blood Serum of Ultrahigh Frequency Electromagnetic Field Exposed Animals

Authors: Bogacheva E. V., Alabovskyi V. V., Perov S. Y.

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.

Spatial Structure of Spermophilus Pygmaeus Pallas, 1778 Settlements Found in the Territory of the North-Western Caspian-Sea Region

Authors: Popov N. V., Yakovlev S. A., Sandzhiev V. B.

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.

Light-dependent Bioelectric Activity of Wheat Seedlings

Authors: Strapko A. M., Kasatkin M. Y., Stepanov S. A.

Was studied the peculiarities of tissue changes of bioelectric potentials of spring wheat seedlings in the early stages of ontogeny. Appreciated the contribution of the spectral composition of light and simulated drought conditions on the formation of action potentials in the tissues. It was found that the bioelectrical reaction of wheat seedlings to light exposure differs from etiolated plants and pre-lit. It shows more value to generate an action potential areas of blue and red region of the spectrum.

Biology Features of Ants (Hymenoptera, Formicidae) in the National Park «Khvalynsky» (Saratov Region)

Authors: Pavlova N. S., Anikin V. V., Riga E. Y.

Ants are essential component of ecosystems. Their success is due to the social organization, the ability to alter habitat and use a variety of food resources. Food objects of ants are not large invertebrates, seeds of plants and honeydew aphids. The activity of ant in community dedicated to different time slots. We have founded the dominant group of ants in size in the studied associations (Tetramorium caespitum – in forest; Lasius alienus and species of the genus Myrmica – in steppe). Installed the fauna of 5 living in the ant nests of studied species.

Bioaccumulation of Cadmium (II) by Bacillus sp. 14 Rhizobacteria

Authors: Lyubun E. V., Pleshakova E. V.

To study the resistance of isolated rhizobacterium Bacillus sp. 14 to cadmium (II), bioaccumulation of the metal by this microorganism was investigated. It was shown that accumulation of cadmium (II) occurs during the exponential phase of the microorganism’s growth. The predominant role of the extracellular surface of the growing cells Bacillus sp. 14 in the cadmium (II) resistance was clarified.

Gene Expression of Specific Factors Transcription Exp1 during Morphogenesis Xylotrophic Basidiomycete Lentinus Edodes

Authors: Kupryashina M. A., Petrov S. V., Nikitina V. E.

It was established that gene expression exp1, encoding a specific transcription factor was activated during transition the vegetative to the generative stage of development in cultivating xylotrophic basidiomycete Lentinus edodes (shiitake) on wood substrate. Especially this is characteristic from stage previous of fruiting and connected with the formation of brown mycelial mat. A study showed that exp1 gene transcriptional activity increased 10-fold during formation of the morphological structure, while drop in activity of the gene was marked for primordial and fruiting bodies.

ANTIBIOTIC SUSCEPTIBILITY OF PATHOGENS IN URINARY TRACT INFECTIONS IN COMMUNITY

Authors: Glinskaya E. V., Nechayeva O. V., Лунева И. О., Аль-Баяти Б. М.

This study was done to evaluate the bacterial profile and antibiotic susceptibility pattern of urinary tract infections (UTIs) microbial causative agents. For proper identification of causative microbial agents, mid– stream urine (MSU) samples were taken from 325 patients suspected to have UTI. These specimens were cultured and subjected to appropriate biochemical tests. Our results revealed that 200 urine samples showed positive cultures. The most prevalence isolates were Escherichia coli with frequency rate of 55.5%, followed by Klebsiella spp. (14%), Enterobacter spp.

Features of Species Diagnostics of the Imago of the Subfamily of Chironominae from Floodplane Lakes of Volga River (Saratov Region). At Research of Flows of Substance and Energy between Water and Land Ecosystems

Authors: Polukonova N. V., Djomina I. V., Ermokhin M. V.

Key to the subfamilies of chironomids (Chironominae) based on the morphology of the male genitalia includes 16 genus and 45 species found in the Volga river floodplain lakes (Saratov region). For the six species of the four genera of the tribe Chironomini (Einfeldia sp.1, Chironomus sp. (Lobochironomus), Dicrotendipes sp.1, Dicrotendipes sp.2, Parachironomus sp., Polypedilum sp.) described morphological differences from the known and the most directly comparable species. 

Biological Properties of Bacteria – Assiociants Schizaphis graminum Rondani, 1852

Authors: Makarov N. O., Glinskaya E. V., Verkhovsky R. A., Abalymov A. A.

The biological features of associative microorganisms Schizaphis graminum in the Saratov Region were studied. 3 species of bacteria from genera Bacillus were isolated. 100% of the species are able to use glucose and xylose; 66,7% – saccharose and mannitol. Alkaline pH is preferred 100% of the isolates. Bacillus clausii, B. oleronius and B. soli have nitrogenase activity and are able to utilize nitrate

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