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Microbial community of the chemocline of the meromictic Lake Shunet (Khakassia, Russia) during summer stratification / D. Y. Rogozin [et al.] // Microbiology. - 2010. - Vol. 79, Is. 2. - P253-261, DOI 10.1134/S0026261710020189 . - ISSN 0026-2617
Кл.слова (ненормированные):
Chemocline -- Cyanobacteria -- Green sulfur bacteria -- Meromictic lakes -- Microstratification -- PCR-DGGE -- Phytoflagellates -- Purple sulfur bacteria -- Bacteria (microorganisms) -- Chlorobi -- Chromatiaceae -- Cryptomonas -- Cyanobacteria -- Lamprocystis purpurea -- Phytomastigophorea -- Proteobacteria -- Synechococcus
Аннотация: The spatio-temporal organization of the bacterial community inhabiting the chemocline of the stratified meromictic Lake Shunet (Khakassia, Russia) was investigated from May to September 2005 by means of microscopy, analysis of photosynthetic pigments, and PCR-DGGE with subsequent 16S rDNA analysis. The samples were collected with a multisyringe stratification sampler, sampling being performed every 5 cm. It was demonstrated that, during the period of investigation, there were no large changes in the bacterial community of the chlemocline, at least among the detected forms. During the whole period of study, purple sulfur bacteria related to Lamprocystis purpurea (Chromatiaceae) were predominant in the chemocline. Beneath the layer of purple bacteria, green sulfur bacteria were revealed that were phylogenetically distant from strain ShNPel02, which was previously isolated from this lake. Development of phytoflagellates of the genus Cryptomonas was observed in the upper zone of the chemocline. In the chemocline of Lake Shunet, the numbers of picoplankton cyanobacteria of the genus Synechococcus increased from May to September. It was demonstrated that the application of universal bacterial primers for DGGE resulted in the same qualitative distributional pattern of predominant species as microscopic studies. В© Pleiades Publishing, Ltd., 2010.

Scopus
Держатели документа:
Institute of Biophysics, Siberian Branch, Russian Academy of Sciences, Akademgorodok, Krasnoyarsk 660036, Russian Federation
Siberian Federal University, pr. Svobodnyi, 79, Krasnoyarsk 660041, Russian Federation : 660036, Красноярск, Академгородок, д. 50, стр. 50

Доп.точки доступа:
Rogozin, D.Y.; Trusova, M.Y.; Khromechek, E.B.; Degermendzhy, A.G.

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Degradation of polyhydroxyalkanoates in eutrophic reservoir / T. G. Volova [et al.] // Polymer Degradation and Stability. - 2007. - Vol. 92, Is. 4. - P580-586, DOI 10.1016/j.polymdegradstab.2007.01.011 . - ISSN 0141-3910
Кл.слова (ненормированные):
16S rDNA -- Degradation -- DGGE -- Polyhydroxyalkanoates -- Reservoir -- Biodegradation -- Climate change -- Ecosystems -- Eutrophication -- Genetic engineering -- Physical chemistry -- Eutrophic reservoir -- Phylogenetic analysis -- Physicochemical properties -- Polyhydroxyalkanoates -- Organic polymers
Аннотация: During the summers of 1999-2001 the dynamics of polyhydroxyalkanoate degradation in a small recreational eutrophic reservoir was studied experimentally. It has been shown that biodegradation of polyhydroxyalkanoates in the environment is determined by the structure and physicochemical properties of the polymer and by local weather conditions, which influence the state of the aquatic ecosystem. Species (clones) of bacteria able to utilize polyhydroxyalkanoates in the reservoir were identified using molecular phylogenetic analysis of 16S rRNA genes. В© 2007 Elsevier Ltd. All rights reserved.

Scopus
Держатели документа:
Siberian Federal University, Svobodny av. 79, Krasnoyarsk, 660041, Russian Federation
Institute of Biophysics, Siberian Branch, Russian Academy of Sciences, Akademgorodok, Krasnoyarsk, 660036, Russian Federation : 660036, Красноярск, Академгородок, д. 50, стр. 50

Доп.точки доступа:
Volova, T.G.; Gladyshev, M.I.; Trusova, M.Y.; Zhila, N.O.

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Seasonal features of consumption of lysine by uncultivated bacterial plankton of Eutrophic water reservoir / M. Y. Trusova, O. V. Kolmakova, M. I. Gladyshev // Contemporary Problems of Ecology. - 2012. - Vol. 5, Is. 4. - P391-398, DOI 10.1134/S1995425512040154 . - ISSN 1995-4255
Кл.слова (ненормированные):
16S ribosomal RNA -- biogeochemical function -- denaturing gradient gel electrophoresis -- eutrophic water reservoir -- lysine -- microecosystem (MES) -- uncultivated bacterial plankton -- amino acid -- bacterioplankton -- bacterium -- biogeochemistry -- electrokinesis -- eutrophication -- laboratory method -- microbial community -- polymerase chain reaction -- reservoir -- seasonal variation -- specialization -- Bacteria (microorganisms)
Аннотация: Dynamics of bacterial plankton community of eutrophic water reservoir in laboratory microecosystems with amino acid lysine was studied using PCR-DGGE technique. The addition of lysine to the microecosystems resulted in changes in the composition of the bacterial plankton in summer; in particular, a number of Lys1 and Lys2 species (genotypes) that consume this amino acid grew fast in the bacterial community. The plank tonic bacterial communities did not respond to the addition of lysine in spring and late summer. The obtained data confirm the hypothesis for the narrow specialization of bacterial plankton species to the consumption of individual organic substances. В© 2012 Pleiades Publishing, Ltd.

Scopus
Держатели документа:
Institute of Biophysics of Siberian Branch of Russian Academy of Sciences, Akademgorodok 50-50, Krasnoyarsk 660036, Russian Federation
Siberian Federal University, Svobodnii prosp. 79, Krasnoyarsk 660041, Russian Federation : 660036, Красноярск, Академгородок, д. 50, стр. 50

Доп.точки доступа:
Trusova, M.Y.; Kolmakova, O.V.; Gladyshev, M.I.

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