Биология

It is shown that habitat conditions have a strong influence on the shape and vitality of the state of the individual Calophaca wolgarica. The most favorable conditions for the growth of Calophaca wolgarica in the Volgograd region are aligned sites with non-light-chestnut fairly rich soils in shrub-grass and couch-grass communities on the edges of the belts, on which there is no mowing and minimal grazing.

Data by definition of the maintenance of pigments of photosynthesis (a chlorophyll and carotenoid) in leaves and top междоузлии a stalk of summer soft wheat at the moment of flowering are cited. Distinction by quantity of pigments in different zones of a plate top leaf at investigated grades is established: a chlorophyll – 0,72–5,1; carotenoid – 0,37– 1,3 mg/g of fresh weight. Increase of the maintenance of pigments from bottom to the top zone of a vagina top leaf and междоузлия is revealed.

28 species of vascular plants of the Volga Upland – rare spring ephemeroids in need of protection and recommended for inclusion in the Red Data Book of the Volga basin.

Показано, что выращивание Azospirillum brasilense Sp245 и Sp7 в
присутствии эффективных концентраций рутина и кверцетина,
установленных для данных культур, приводило к изменениям
электрооптических характеристик суспензий бактериальных
клеток. Продемонстрировано изменение в этих условиях физи-
ко-химических и антигенных свойств поверхности бактериаль-
ных клеток и макромолекулярной организации ЛПС.
 

Установлены фенологические особенности непарного шелко-
пряда (Limantria dispar Linnaeus, 1758), златогузки (Euproctis
chrysorrhoea Linnaeus, 1758) и зеленой дубовой листовертки
(Tortrix viridana Linnaeus, 1758) в условиях Южного Предуралья.
Развитие куколок непарного шелкопряда в среднем происходит
за 28 дней с накоплением суммы среднесуточных положительных
температур 598°С. Лёт имаго филлофага происходит в период с
первой декады июля по вторую декаду августа. На фазу имаго

It has been determined that timescales of the beginning of summer intensive epizootics in the plain natural plague foci of souslik type in the Northern, North-Western Pre-Caspian and Pre-Caucasus Regions coincide with the period of adult small sousliks migration to the landscape lowering, building of protective burrows, and formation of flea micro-populations in them. Substantiated is existence of the mechanism that determines seasonal character of animals infecting during 30–40 days (III decade of May – II decade of June) at the same sites of focal territory.

An extracellular polysaccharide (EPS) produced by the gram- negative nonpathogenic rhizosphere bacteria Enterobacter cloa- cae K7 was isolated and characterized. The process of biosorption of Cu(II) cations from aqueous solution by the isolated exopoly- saccharides was investigated. The maximum sorption capac- ity was 0.17 mM/mg of EPS or 12 g of Cu(II) per g of EPS at pH 5, T = 25 °C, and incubation for 30 min.

In this work we present these histological examination of the kidneys of pregnant females Caspian seals and their fetuses. In the renal tissue of Mature females seals were marked signs of chronic glo- merulonephritis and amyloidosis.

The article presents the results of lichens’ research of the National Park «Khvalynsky» in 2011–2013 and data processing of herbarium collection SARAT and other researchers. The annotated list is pre- sented. It includes 65 species. Among them one specie (Cladonia acuminata) is new for the Saratov Region, two species (Cladonia decorticata, Cl. botrytes) are new for the Privolzhskaya Upland.

Microbiological indication of soil over Stepnovskoye underground storage of natural gas was carried out on the basis of estimating the number of heterotrophic, hydrocarbon-oxidizing and methylotrophic bacteria. Increased number of microorganisms of test physiological groups were found, indicating the admission of methane in the upper layers of the soil. The possibility of using hydrocarbon-oxidizing and methylotrophic bacteria for environmental monitoring of soil in the areas of natural gas storage facilities was shown.