Effect of Salinity Stress on Phenolic Compounds and Antioxidant Activity in Halophytes (L.) Griseb. and L. Cultured .

The study of halophytes as sources of phenolic compounds, as well as conditions that further enhance the accumulation of biologically active compounds in them, is of particular interest. In this paper, the effect of different salinity levels (25-500 mM in the form of NaCl) on the content of phenolic compounds and the antioxidant activity of two rare halophyte species (L.) Griseb.

The Content of Certain Groups of Phenolic Compounds and the Biological Activity of Extracts of Various Halophyte Parts of (L.) Griseb. and L. at Different Levels of Soil Salinization.

Halophyte plants are known for their resistance to harsh environmental conditions associated with excess salts in their habitats. Their resistance to salinization is due, among other things, to their high ability to detoxify free radicals, owing to the relatively high content of antioxidants. On the coast of the Baltic Sea and in the lagoons, there are several rare halophyte species included in the Red Book of the Kaliningrad Region (Russia) and the Baltic region, such as (L.

[HALOTOLERANCE OF ENTEROBACTERIA ISOLATED FROM WATER AND FISH IN THE VOLGA RIVER DELTA].

In the article there are presented the results of a study of halotolerance of enterobacteria isolated from water and fish in the Volga River delta, which were dominant in the microbial landscape of these biotopes. Their halotolerance was studied by means of inoculation of daily pure cultures of meat--peptone broth with 3, 7 and 10% of sodium chloride and incubation at 37°C. At that all studied microflora was found to have significant indices of halotolerance with a predominance of aquatic isolates.

[Features of antibiotic resistance of enterobacteria in the Volga River delta].

In the article there are presented the results of a study of antibiotic resistance of Enterobacteriaceae isolated from water of Volga River delta. Found that all the investigated microflora was established to have acquired multiple antibiotic resistance in dependence on the season of the year and the inhabited area. Minimal antibiotic resistance of Enterobacteriaceae was registered to Tobramycin and Chloramphenicol, the maximal resistance--to Benzylpenicillinum and Ampicillin.

[Role of Aeromonas in the monitoring of a hydroecosystem in the Volga-Caspian area].

The paper gives data obtained over many years on the quantity of bacteria of the genus Aeromonas in the hydroecosystems of the delta of the Volga and Caspian Sea and in commercial fishes (sturgeon (Acipenseridae), pike perch (Stizostedion), carp (Cyprinus carpio), silurus (Silurus glanis), etc.). It provides a detailed analysis of their seasonal trends and spatial distribution, markers of their pathogenicity, and antibiotic resistance.