Biology

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

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

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

The Saratov Sources and Studying Ways Physiology of Plants in Russia

The history development of physiology of plants in Saratov, the basic directions of studying of plant biology, activity of known scientists of Russia is considered: V. R. Zalenskogo, A. R. Kizelja, A. A. Richter, N. A. Maksimova, I. V. Krasovsky and V. A. Kumakova. 

To Biology of a Rare Species of Primula Farinosa L. in Ritsinsky Relic National Park (Abkhazia Republic)

Research of eight populations of a rare species Primula farinosa L (syn. Р. algida auct. fl. colch.) in Ritsinsky relic national park (Abkhazia Republic) is conducted. The studied coenopopulations are located at the height of 1645–2250 m above sea level. Total number of species in them makes about 2200 pieces. In the majority of morphometric parameters coenopopulations from the natural boundary Pyv. On vital state three populations are carried to prospering, two – to equilibrium and three populations depressive. Optimum conditions for growth of Primula farinosa are defined.

Associative Microorganisms Shoots Apple Tree (Malus P. Mill, 1754) in Saratov Region

Species composition, quantitative indicators and the occurrence of bacteria and fungi associated with apple shoots in the Saratov region were studied. On the surface shoots isolated 12 species of bacteria, and 4 species of fungi, of the internal environment – 14 species of bacteria and 3 species of fungi. The most common surface associates apple shoots appeared bacterium Bacillus subtilis, Pantoea agglomerans, fungus Alternaria sp. and Fusarium tricinctum, internal environment shoots – Bacillus subtilis, Bacillus amyloliquefaciens, Penicillium sp.

Developing and Testing Laboratory Samples of Innovative Biologically Active Preparations Based on the Core-shell Structure

We developed various options of biologically active agents based on the core–shell structure technology. They were obtained by layering biocompatible polymer on the surface of the carriers. As a core, we used a heterocyclic compound comprising of enamine and flavonoid nanoaggregates. As a shell, we used polу azolidinе аmmonium modified by iodine hydrate-ions. Our results implied a significant increase in antimicrobial activity of the preparations developed by us.

The State of the Cenopopulation Delphinium Pubiflorum (Dc.) Turcz. Ex Huth in Tatishevskiy District of the Saratov Region

Delphinium pubiflorum grows sparsely in the meadow-steppe forbgrass-shrub community on carbonate chernozem fairly rich soil. Habitat conditions correspond to moderately variable meadow-steppe hydration. The spatial structure of populations of non-uniform: there are a multitude of plants and detached instances; population density was approximately 7–8 plants per 100 m2.

Water Deficit of Woody Plants in Different Environmental Conditions

Materials on brich, balsam poplar water deficit under polymetallic pollution are presented in this article. The purpose of this work content of water in leaves of a birch, poplar in morning, midday and afternoon hours is defined. The relative vital condition of wood plants in the conditions of pollution of the Sterlitamak industrial center and in a zone of conditional control is estimated. There have been investigated root systems of wood plants. The object of investigations was brich, balsam poplar, located in different disfance from industrial enterprises of Sterlitamak.

Potamogetonaceae in Herbarium SSU (Sarat). Part 2

The article presents the results of the inventory of herbarium collections of six species of Potamogetonaceae, stored in the Herbarium of SSU, a database of locations of these species, including 205 record from the territory of Astrakhan, Volgograd, Penza, Samara, Saratov region and Western Kazakhstan.

Biological Properties of Bacteria – Assiociants Aphis Pomi Degeer, 1773

The biological features of associative microorganisms Aphis pomi in the Saratov Region were studied. 12 species of bacteria from 2 genera were isolated. 94.2% of the species are able to use glucose; 76.5% – saccharose. Alkaline pH is preferred 100% of the isolates. Bacillus funiculus, B. clausii, B. oleronius, B. soli have pectinase activity, 83% of the species have the enzyme nitrogenase, 58% of species are capable to recove cellulose.

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