Биология

Studied the power of saiga in the Caspian lowland in June 2011. Mikrogistologichesky cuticularscatological analysis of undigested food residues revealed a specific and quantitative differences in the diet of animals on two types of pasture. Analysis of feeds and their digestibility revealed optimal habitat for the saiga.

Results of research of flora of a nature sanctuary are given in this article «the Burkinsky wood». 31 types of the protected vascular plants included in the Red book of the Saratov region are revealed. The taksonomichesky, biomorphological and ekologo-tsenotichesky analysis of rare species is carried out. Paths of use of types of a nature sanctuary are defined.

Cause-effect relationship has been identified for each of the observed mating event. There are a numbers of behavioral phases that occurring before and after a mating process. The most important factor that initializes precopulation behavior for males is an active aggressive behavior of females, indicating the behavioral manifestations of estrus. It was estimated that a high level of activity of females on a rookery after mating can cause other mating with another males.

The optimum variant of explant sterilization of mountain ash var. «Granatnaya» for introduction in culture in vitro has been picked up. It is shown that the nutrient medium WPM with addition of 1,0 mg/l of BAP is optimum for klonal mikropropogation, spontaneous regenerant rooting being found only on nutrient media without hormones. It has been established that the optimum variant of the nutrient medium at the stage of rooting is 1/2WPM with addition of 1,0 mg/l of NАА.

Formation of elements efficiency of an spike wheat of different cultivar is analysed. It is offered to use for an estimation of potential productivity of a cultivar morphogenetic an efficiency index.

The hybrid gladiolus occupies one of the leading places among the huge number of perennial plants thanks to its decorative qualities and the timing of flowering. In order to select a site for the cultivation of gladiolus it is necessary to consider its requirements for agrochemical soil condition. The analysis was made of the soil territory the Educational Centre «Botanical Garden» of Saratov State University, which is used for the cultivation of corms gladioli.

The article contains the results of the coastal beetles research (Medveditsa river Lysogorsky district Saratov region). There is also a brief description of the investigated biotope. List of 19 faunal species of beetles, that contains 9 species and one family, which are specified as new to the fauna of the Saratov Area, is presented. The representatives of investigated set of beetles are divided into ecological groups.

The mode of seed reproduction in four species Calamagrostis of peninsula Kamchatka (Russia) flora has been examined (C. langsdorffii (Link) Trin., C. lapponica Wahl., C. neglecta (Ehrh.) Gaertn., C. sesquiflora Trin.). In C. lapponica and C. neglecta studied plants are characterized by highly degree of pollen sterility (61,2 and 24,8% respectively) and significant variation of pollen grains size (CV = 17,4 and 18,7%), which is typical for apomictic forms.

Antimicrobial phototherapy is an alternative method for combating clinically signifi cant microorganisms associated with lesions of the skin, mucous membranes of the oral cavity, respiratory, gastrointestinal and urogenital tracts. The method uses non-toxic dyes called photosensitizers, molecules that can be excited by harmless visible light to form reactive oxygen species. Numerous studies of the method in vitro and in vivo have demonstrated the destruction of microorganisms or a signifi cant reduction in their number.

The formation of the elemental composition of plants is a dynamic process, which is aff ected by a large number of concurrent genetic and environmental factors, and their signifi cance varies according to the conditions and the state of the environment. The goal of the work was to study the characteristics of the accumulation of 8 chemical elements in Scots pine wood under the infl uence of seasonal and ecological variability. The objects of our research were old-growth forest stands on the territory of the Berezinsky Biosphere Reserve.