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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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Spatial distribution of resting stages (akinetes) of the cyanobacteria Anabaena flos-aquae in sediments and its influence on pelagic populations / E. S. Kravchuk, E. A. Ivanova, M. I. Gladyshev // Marine and Freshwater Research. - 2011. - Vol. 62, Is. 5. - P450-461, DOI 10.1071/MF10256 . - ISSN 1323-1650
Кл.слова (ненормированные):
cyanobacterial blooms -- harmful algae -- reservoir -- resting stages -- sediment management -- water quality -- abundance -- bioaccumulation -- biomass -- cyanobacterium -- environmental factor -- experimental study -- green alga -- inoculation -- littoral environment -- macrophyte -- pelagic environment -- phytoplankton -- population structure -- qualitative analysis -- recruitment (population dynamics) -- reservoir -- seasonal variation -- sediment analysis -- silt -- spatial distribution -- vertical distribution -- water quality -- Siberia -- algae -- Anabaena flos-aquae -- Cyanobacteria
Аннотация: Recruitment of pelagic populations of cyanobacteria from littoral bottom sediments is assumed to be one of the key factors for the development of harmful blooms. Therefore, it is necessary to obtain more information on the possible factors influencing the spatial distribution of the resting stages in littoral bottom sediments. To test the hypothesis that akinete abundances in littoral bottom sediments are associated with silt and the presence of higher water plants, we sampled spatial and vertical distribution and seasonal dynamics of akinetes of cyanobacterium Anabaena flos-aquae in a small Siberian reservoir. We found that akinetes accumulate in silt at stations located in macrophyte beds. Two experiments were carried out to test if there is relationship between size of inoculum and size of the pelagic population of A. flos-aquae. The proportion of A. flos-aquae in total phytoplankton biomass depended on the initial abundance of akinetes in bottom sediments. The model based on laboratory experiments gave good qualitative description of the field data. These findings can be useful to predict the location of the main akinete accumulation zones in a water body and plan the removal of sediment to prevent the cyanobacterial blooms. В© CSIRO 2011.

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

Доп.точки доступа:
Kravchuk, E.S.; Ivanova, E.A.; Gladyshev, M.I.

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Effect of way of cooking on content of essential polyunsaturated fatty acids in muscle tissue of humpback salmon (Oncorhynchus gorbuscha) / M. I. Gladyshev [et al.] // Food Chemistry. - 2006. - Vol. 96, Is. 3. - P446-451, DOI 10.1016/j.foodchem.2005.02.034 . - ISSN 0308-8146
Кл.слова (ненормированные):
antioxidant -- docosahexaenoic acid -- essential fatty acid -- icosapentaenoic acid -- omega 3 fatty acid -- polyunsaturated fatty acid -- animal tissue -- conference paper -- controlled study -- cooking -- ecological niche -- evolution -- fish -- fluid intake -- food analysis -- freezing -- frying -- heat treatment -- heating -- hypothesis -- market -- muscle tissue -- nonhuman -- oncorrhynchus gorbuscha -- reduction -- Russian Federation -- salmon -- statistical significance -- Animalia -- Oncorhynchus gorbuscha -- Pisces -- Salmonidae
Аннотация: Contents of fatty acids in filets of unfrozen (control), boiled, fried, roasted and boiled in a small amount of water humpback salmon, collected from a wholesale market in Krasnoyarsk city (Siberia, Russia) were analyzed. Special attention was paid to essential polyunsaturated fatty acids of ?3 family: eicosapentaenoic, 20:5?3 (EPA) and docosahexaenoic, 22:6?3 (DHA). Heat treatment in general did not decrease content of EPA and DHA in humpback, except a modest reduction during frying. Cooked humpback appeared to be the valuable source of essential ?3 PUFAs, namely EPA and DHA. It was hypothesized that the absence of significant reduction of PUFAs' contents in red flesh of fishes of Salmonidae family during heat treatment may be due to a high level of natural antioxidants which formed in the course of evolution as adaptation to their ecological niche. В© 2005 Elsevier Ltd. All rights reserved.

Scopus
Держатели документа:
Institute of Biophysics, Siberian Branch, Russian Academy of Sciences, Akademgorodok, Krasnoyarsk 660036, Russian Federation
Krasnoyarsk State Trade-Economical Institute, Lidiya Prushinskaya Street, 2, Krasnoyarsk 660075, Russian Federation : 660036, Красноярск, Академгородок, д. 50, стр. 50

Доп.точки доступа:
Gladyshev, M.I.; Sushchik, N.N.; Gubanenko, G.A.; Demirchieva, S.M.; Kalachova, G.S.

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Individual-based model of the reproduction cycle of Moina macrocopa (Crustacea: Cladocera) / E. S. Zadereev [et al.] // Ecological Modelling. - 2003. - Vol. 162, Is. 1-2. - P15-31, DOI 10.1016/S0304-3800(02)00348-4 . - ISSN 0304-3800
Кл.слова (ненормированные):
Change of reproduction mode -- Cladocera -- Individual-based model -- Metabolic by-products -- ecological modeling -- individual-based model -- reproductive cycle -- Animalia -- Cladocera -- Crustacea -- Moina macrocopa
Аннотация: An individual-based model of cyclic development of Cladocera populations was developed on the basis of experimental data. The model takes into account the following processes describing the development of an individual animal: maturation, transition into other reproductive classes, selection of the reproduction mode (parthenogenetic or gamogenetic), release of parthenogenetic progeny and death. The model assumes that switching from asexual to sexual reproduction is controlled by the concentration of food and metabolic by-products of the animal population. Verification of the model by independent experiments demonstrated that (1) during population growth, metabolic by-products build up in the medium, and (2) the effect of metabolic by-products on gamogenesis induction depends on concentration. The hypothesis that the effect of regulating reproductive switching factors should synchronise the development of population with the change of environmental conditions in order to ensure production of the maximum number of diapausing eggs was tested. It is shown that combination of regulating reproductive switching factors maximises the production of diapausing eggs. В© 2002 Elsevier Science B.V. All rights reserved.

Scopus
Держатели документа:
Institute of Biophysics, Akademgorodok, 660036 Krasnoyarsk, Russian Federation : 660036, Красноярск, Академгородок, д. 50, стр. 50

Доп.точки доступа:
Zadereev, E.S.; Prokopkin, I.G.; Gubanov, V.G.; Gubanov, M.V.

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The role of population density in gamogenesis induction in moina macrocopa (Cladocera: Crustaceae) / E. S. Zadereev, V. G. Gubanov // Zhurnal Obshchei Biologii. - 1996. - Vol. 57, Is. 3. - С. 366-367 . - ISSN 0044-4596
Аннотация: Combined influence of population density, temperature and photoperiod on the gamogenesis of individual females of M. macrocopa was investigated. In all experiments the influence of population density was associated with the direct effect of "swarm water". The photoperiod in its broad natural range also influences gamogenesis induction. The increase in temperature above optimum but lower than lethal level sharply decreases the efficiency of gamogenesis. In this case stimulation of gamogenesis is possible by combined effect of poor feeding and high population density. If temperature and photoperiod are optimum for partenogenetic population the change of reproduction mode in lowdensity population of M. macrocopa is determined by poor feeding while in high-density populations density itself is more important. However the increase in food concentration descreases the efficiency of "swarm water" on the gamogenesis induction. According to the hypothesis of nondirect influence of population density an individual decreases its filtarion rate (and starves) under "swarm water" condition.

Scopus
Держатели документа:
Institute of Biophysics, Siberian Br. Russ. Acad. of Science, Akademgorodok, Krasnoyarsk 660036, Russian Federation : 660036, Красноярск, Академгородок, д. 50, стр. 50

Доп.точки доступа:
Zadereev, E.S.; Gubanov, V.G.

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Untangling metabolic and spatial interactions of stress tolerance in plants. 1. Patterns of carbon metabolism within leaves / K. Y. Biel [et al.] // Protoplasma. - 2010. - Vol. 245, Is. 1. - P49-73, DOI 10.1007/s00709-010-0135-7 . - ISSN 0033-183X
Кл.слова (ненормированные):
Carbon metabolism -- Leaf anatomy -- Leaf form and function -- Maximal ecological utility -- Photosynthesis -- Stress tolerance Spinacia oleracea -- aspartate aminotransferase isoenzyme 1 -- bicarbonate -- carbon -- carbon dioxide -- catalase -- chlorophyll -- malate dehydrogenase -- oxygen -- ribulosebisphosphate carboxylase -- vegetable protein -- article -- enzymology -- histology -- light -- metabolism -- oxidation reduction reaction -- photosynthesis -- physiological stress -- physiology -- plant leaf -- spinach -- theoretical model -- Aspartate Aminotransferase, Cytoplasmic -- Bicarbonates -- Carbon -- Carbon Dioxide -- Catalase -- Chlorophyll -- Light -- Malate Dehydrogenase -- Models, Theoretical -- Oxidation-Reduction -- Oxygen -- Photosynthesis -- Plant Leaves -- Plant Proteins -- Ribulose-Bisphosphate Carboxylase -- Spinacia oleracea -- Stress, Physiological -- Spinacia oleracea
Аннотация: The localization of the key photoreductive and oxidative processes and some stress-protective reactions within leaves of mesophytic C3 plants were investigated. The role of light in determining the profile of Rubisco, glutamate oxaloacetate transaminase, catalase, fumarase, and cytochrome-c-oxidase across spinach leaves was examined by exposing leaves to illumination on either the adaxial or abaxial leaf surfaces. Oxygen evolution in fresh paradermal leaf sections and CO2 gas exchange in whole leaves under adaxial or abaxial illumination was also examined. The results showed that the palisade mesophyll is responsible for the midday depression of photosynthesis in spinach leaves. The photosynthetic apparatus was more sensitive to the light environment than the respiratory apparatus. Additionally, examination of the paradermal leaf sections by optical microscopy allowed us to describe two new types of parenchyma in spinach-pirum mesophyll and pillow spongy mesophyll. A hypothesis that oxaloacetate may protect the upper leaf tissue from the destructive influence of active oxygen is presented. The application of mathematical modeling shows that the pattern of enzymatic distribution across leaves abides by the principle of maximal ecological utility. Light regulation of carbon metabolism across leaves is discussed. В© 2010 Springer-Verlag.

Scopus
Держатели документа:
Institute of Basic Biological Problems, Russian Academy of Sciences, Pushchino, Moscow Region 142290, Russian Federation
Biosphere Systems International Foundation, Oro Valley, AZ 85755, United States
International Scientific Centre for Organism Extreme States Research, Krasnoyarsk Scientific Centre, Siberian Branch of the Russian Academy of Sciences, Krasnoyarsk 660036, Russian Federation
Institute of Forest, Siberian Branch of the Russian Academy of Sciences, Krasnoyarsk 660036, Russian Federation
Institute of Biophysics, Siberian Branch of the Russian Academy of Sciences, Krasnoyarsk 660036, Russian Federation
Biocompatible Plant Research Institute, College of Natural Sciences, California State University, Chico, CA 95929-0555, United States : 660036, Красноярск, Академгородок, д. 50, стр. 50

Доп.точки доступа:
Biel, K.Y.; Fomina, I.R.; Nazarova, G.N.; Soukhovolsky, V.G.; Khlebopros, R.G.; Nishio, J.N.

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Effects of the bacterial component on the viability of the Paramecium bursaria symbiotic complex (Infusorian-Zoochlorella) / Yu. V. Barkhatov, E. B. Khromechek, V. G. Gubanov // Russian Journal of Ecology. - 2001. - Vol. 32, Is. 4. - P261-265, DOI 10.1023/A:1011314622045 . - ISSN 1067-4136
Кл.слова (ненормированные):
Endosymbiosis -- Matter exchange cycle -- Paramecium bursaria -- bacterium -- symbiosis -- viability -- algae -- Bacteria (microorganisms) -- Ciliophora -- Paramecium -- Paramecium bursaria -- Zoochlorella
Аннотация: A hypothesis is considered that the establishment and maintenance of mass exchange processes in the Paramecium bursaria symbiotic complex (infusorian-alga) depends on the presence of the third component-bacteria-whose role is underestimated but essential for completing the exchange cycle. The role of this component in the symbiotic cycle of Paramecium bursaria is possible to reveal using special bactericidal preparations specifically inhibiting the bacteria involved in the metabolic cycle but having no effect on the functions of the host cell and the zoochlorella population. Experiments with various preparations of this type were performed, and the response to treatment was estimated from growth rates of the symbiotic complex and its components. This allowed identification of an antibiotic (rifampicin) that had no adverse influence on free-living zoochlorella and chlorella-free paramecia (the basic components of the symbiotic cycle) but drastically inhibited the growth of the P. bursaria symbiotic complex, which could be interpreted as evidence in favor of the hypothesis concerning the existence of the third symbiotic component.

Scopus
Держатели документа:
Institute of Biophysics, Siberian Division, Russian Academy of Sciences, Akademgorodok, Krasnoyarsk, 660036, Russian Federation : 660036, Красноярск, Академгородок, д. 50, стр. 50

Доп.точки доступа:
Barkhatov, Yu.V.; Khromechek, E.B.; Gubanov, V.G.

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Crystal structure of a Ca2+-discharged photoprotein - Implications for mechanisms of the calcium trigger and bioluminescence [Text] / L. . Deng [et al.] // J. Biol. Chem. - 2004. - Vol. 279, Is. 32. - P33647-33652, DOI 10.1074/jbc.M402427200. - Cited References: 31 . - ISSN 0021-9258

РУБ Biochemistry & Molecular Biology
Рубрики:
VIOLET BIOLUMINESCENCE
   ANGSTROM RESOLUTION
   ELECTRON-DENSITY
   W92F OBELIN
   AEQUORIN
   PROTEINS
   LIGHT
   SEQUENCE
   BINDING
   COELENTERAZINE
Аннотация: Ca2+-regulated photoproteins are members of the EF-hand calcium-binding protein family. The addition of Ca2+ produces a blue bioluminescence by triggering a decarboxylation reaction of protein-bound hydroperoxycoelenterazine to form the product, coelenteramide, in an excited state. Based on the spatial structures of aequorin and several obelins, we have postulated mechanisms for the Ca2+ trigger and for generation of the different excited states that are the origin of the different colors of bioluminescence. Here we report the crystal structure of the Ca2+-discharged photoprotein obelin at 1.96-Angstrom resolution. The results lend support to the proposed mechanisms and provide new structural insight into details of these processes. Global conformational changes caused by Ca2+ association are typical of the class of calcium signal modulators within the EF-hand protein superfamily. Accommodation of the Ca2+ ions into the loops of the EF-hands is seen to propagate into the active site of the protein now occupied by the coelenteramide where there is a significant repositioning and flipping of the His-175 imidazole ring as crucially required in the trigger hypothesis. Also the H-bonding between His-22 and the coelenterazine found in the active photoprotein is preserved at the equivalent position of coelenteramide, confirming the proposed rapid excited state proton transfer that would lead to the excited state of the phenolate ion pair, which is responsible for the blue emission of bioluminescence.

Держатели документа:
Univ Georgia, Dept Biochem & Mol Biol, Athens, GA 30602 USA
Univ Georgia, Dept Chem, Athens, GA 30602 USA
Russian Acad Sci, Inst Biophys, Siberian Branch, Krasnoyarsk 660036, Russia
ИБФ СО РАН : 660036, Красноярск, Академгородок, д. 50, стр. 50

Доп.точки доступа:
Deng, L...; Markova, S.V.; Vysotski, E.S.; Liu, Z.J.; Lee, J...; Rose, J...; Wang, B.C.

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Structures of the Ca2+-regulated photoprotein obelin Y138F mutant before and after bioluminescence support the catalytic function of a water molecule in the reaction [Text] / P. V. Natashin [et al.] // Acta Crystallogr. Sect. D-Biol. Crystallogr. - 2014. - Vol. 70. - P720-732, DOI 10.1107/S1399004713032434. - Cited References: 71. - We acknowledge the use of beamline BL17U1 at the Shanghai Synchrotron Radiation Facility, China. This work was supported by RFBR grants 12-04-91153, 12-04-00131 and the China-Russia International Collaboration grant from the Chinese Academy of Sciences and NSFC, by the Programs of the Government of the Russian Federation 'Measures to Attract Leading Scientists to Russian Educational Institutions' (grant 11.G34.31.0058) and 'Molecular and Cellular Biology' of the RAS, the President of the Russian Federation 'Leading Science School' (grant 3951.2012.4). PVN and EVE were supported by RFBR grant 14-04-31092. . - ISSN 0907-4449. - ISSN 1399-0047

РУБ Biochemical Research Methods + Biochemistry & Molecular Biology + Biophysics + Crystallography
Рубрики:
AEQUORIN BIOLUMINESCENCE
   SEQUENCE-ANALYSIS
   CRYSTAL-STRUCTURE
   CA2+-BINDING PHOTOPROTEIN
   VIOLET BIOLUMINESCENCE
   CALCIUM CONCENTRATION
   ANGSTROM RESOLUTION
   RECOMBINANT OBELIN
   MNEMIOPSIS-LEIDYI
   EXCITED-STATES
Аннотация: Ca2+-regulated photoproteins, which are responsible for light emission in a variety of marine coelenterates, are a highly valuable tool for measuring Ca2+ inside living cells. All of the photoproteins are a single-chain polypeptide to which a 2-hydroperoxycoelenterazine molecule is tightly but noncovalently bound. Bioluminescence results from the oxidative decarboxylation of 2-hydroperoxycoelenterazine, generating protein-bound coelenteramide in an excited state. Here, the crystal structures of the Y138F obelin mutant before and after bioluminescence are reported at 1.72 and 1.30 angstrom resolution, respectively. The comparison of the spatial structures of the conformational states of Y138F obelin with those of wild-type obelin gives clear evidence that the substitution of Tyr by Phe does not affect the overall structure of both Y138F obelin and its product following Ca2+ discharge compared with the corresponding conformational states of wild-type obelin. Despite the similarity of the overall structures and internal cavities of Y138F and wild-type obelins, there is a substantial difference: in the cavity of Y138F obelin a water molecule corresponding to W2 in wild-type obelin is not found. However, in Ca2+-discharged Y138F obelin this water molecule now appears in the same location. This finding, together with the observed much slower kinetics of Y138F obelin, clearly supports the hypothesis that the function of a water molecule in this location is to catalyze the 2-hydroperoxycoelenterazine decarboxylation reaction by protonation of a dioxetanone anion before its decomposition into the excited-state product. Although obelin differs from other hydromedusan Ca2+-regulated photoproteins in some of its properties, they are believed to share a common mechanism.

wos
Держатели документа:
[Natashin, Pavel V.
Ding, Wei
Liu, Zhi-Jie] Chinese Acad Sci, Inst Biophys, Natl Lab Biomacromol, Beijing 100080, Peoples R China
[Natashin, Pavel V.
Eremeeva, Elena V.
Markova, Svetlana V.
Vysotski, Eugene S.] Russian Acad Sci, Inst Biophys, Photobiol Lab, Siberian Branch, Krasnoyarsk, Russia
[Natashin, Pavel V.
Eremeeva, Elena V.
Markova, Svetlana V.
Vysotski, Eugene S.] Siberian Fed Univ, Inst Fundamental Biol & Biotechnol, Lab Bioluminescence Biotechnol, Chair Biophys, Krasnoyarsk, Russia
[Ding, Wei] Chinese Acad Sci, Inst Biophys, Ctr Biol Imaging, Beijing 100080, Peoples R China
[Lee, John] Univ Georgia, Dept Biochem Mol Biol, Athens, GA 30602 USA
[Liu, Zhi-Jie] Shanghai Tech Univ, Human Inst, Shanghai, Peoples R China
ИБФ СО РАН : 660036, Красноярск, Академгородок, д. 50, стр. 50

Доп.точки доступа:
Natashin, P.V.; Ding, W...; Eremeeva, E.V.; Markova, S.V.; Lee, J...; Vysotski, E.S.; Liu, Z.J.; RFBR [12-04-91153, 12-04-00131, 14-04-31092]; Chinese Academy of Sciences; NSFC; Programs of the Government of the Russian Federation 'Measures to Attract Leading Scientists to Russian Educational Institutions' [11.G34.31.0058]; RAS; Russian Federation 'Leading Science School' [3951.2012.4]

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10.

Large Earthquakes in the Baikal Region as Response to Bifurcations in Nonlinear Resonance Hysteresis [Text] / A. V. Klyuchevskii, R. G. Khlebopros // Dokl. Earth Sci. - 2014. - Vol. 457, Is. 1. - P845-849, DOI 10.1134/S1028334X1407006X. - Cited References: 13 . - ISSN 1028-334X. - ISSN 1531-8354

РУБ Geosciences, Multidisciplinary
Рубрики:
ATTRACTOR STRUCTURES
   RIFT SYSTEM
   LITHOSPHERE
   RIFTOGENESIS
   EVOLUTION
   STAGE
Аннотация: The hypothesis that large earthquakes in the Baikal region are a response to bifurcations in nonlinear resonance hysteresis in a system consisting of three oscillators, attractor structures of riftogenesis, is substantiated. The hypothesis is confirmed by the spatial-temporal and magnitude distribution of large earthquakes: all the pairs of earthquakes with magnitude M-LH 5.5 that took place in the region within a small time period but were remote from one another show fair agreement with the main theoretical conclusions.

WOS
Держатели документа:
[Klyuchevskii, A. V.] Russian Acad Sci, Inst Earths Crust, Siberian Branch, Irkutsk 664033, Russia
Russian Acad Sci, Siberian Branch, Krasnoyarsk Res Ctr, Krasnoyarsk 660036, Russia
Siberian Fed Univ, Krasnoyarsk 660041, Russia
Russian Acad Sci, Inst Biophys, Siberian Branch, Krasnoyarsk 660036, Russia
КНЦ СО РАН
ИБФ СО РАН : 660036, Красноярск, Академгородок, д. 50, стр. 50

Доп.точки доступа:
Klyuchevskii, A.V.; Khlebopros, R.G.

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11.

Component elements of the carbon cycle in the middle and lower Yenisei River [Text] / A. P. Tolomeev [et al.] // Contemp. Probl. Ecol. - 2014. - Vol. 7, Is. 4. - P489-500, DOI 10.1134/S1995425514040118. - Cited References: 41. - This work was supported by a grant from the government of the Russian Federation for support of scientific research activities implemented under the supervision of leading scientists at Russian institutions of higher education (no. 11.G34.31.0014) and by project G-1 of the Siberian Federal University carried out according to Federal Program of the Ministry of Education and Science of the Russian Federation. . - ISSN 1995-4255. - ISSN 1995-4263

РУБ Ecology
Рубрики:
DISSOLVED ORGANIC-MATTER
   DCMU-FLUORESCENCE METHOD
   ARCTIC-OCEAN
   KARA SEA
   OB
   RESPIRATION
   ECOSYSTEM
   SIBERIA
   FLUXES
   BIOGEOCHEMISTRY
Кл.слова (ненормированные):
Yenisei River -- carbon cycle -- nutrients -- primary production -- respiration -- phytoplankton -- bacterioplankton
Аннотация: An integrated study of the middle and lower Yenisei River was performed in the summer of 2012. It involved monitoring the key elements and ecological processes associated with the carbon cycle of the river ecosystem (the study area is more than 1800 km long). Measurements of the production and destruction processes have shown the failure of the "neutral pipe" hypothesis claiming that any river is a simple drain of carbon from terrestrial ecosystems to the ocean. The Yenisei River is not a purely heterotrophic ecosystem. It also has autotrophic areas, where the primary production of planktonic photosynthesis is higher than respiration (above the Angara River and near the Bolshaya and Malaya Heta rivers). According to the data, the respiration rate of the plankton community in the river depends mostly on the water temperature and the content of inorganic phosphorous that can restrict the amount of organic matter consumed by bacterioplankton.

WOS
Держатели документа:
[Tolomeev, A. P.
Anishchenko, O. V.
Kravchuk, E. S.
Kolmakova, O. V.
Makhutova, O. N.
Kolmakova, A. A.
Kolmakov, V. I.
Trusova, M. Yu
Sushchik, N. N.
Gladyshev, M. I.] Russian Acad Sci, Siberian Branch, Inst Biophys, Krasnoyarsk 660036, Russia
[Kolmakova, O. V.
Glushchenko, L. A.
Kolmakov, V. I.
Sushchik, N. N.
Gladyshev, M. I.] Siberian Fed Univ, Krasnoyarsk 660041, Russia
ИБФ СО РАН : 660036, Красноярск, Академгородок, д. 50, стр. 50

Доп.точки доступа:
Tolomeev, A.P.; Anishchenko, O.V.; Kravchuk, E.S.; Kolmakova, O.V.; Glushchenko, L.A.; Makhutova, O.N.; Kolmakova, A.A.; Kolmakov, V.I.; Trusova, M.Y.; Sushchik, N.N.; Gladyshev, M.I.; government of the Russian Federation [11.G34.31.0014]; Siberian Federal University [G-1]

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12.

Mechanism of action of metal salts on bacterial bioluminescent system in vitro [Текст] / N. S. Kydryasheva, E. V. Zuzikova, T. V. Gutnik // Biofizika. - 1999. - Vol. 44, Is. 2. - P. 244-250. - Cited References: 21 . - ISSN 0006-3029

РУБ Biophysics

Кл.слова (ненормированные):
bacterial bioluminescent system -- metal salts, mechanism of action
Аннотация: The action of met al salts on the luciferase-NADH: FMN-oxydoheductase bacterial luminescent system in vitro was studied. The effect is shown to depend on the nature of cations rather than anions, The type of the effect (activation, inhibition, and absence of the effect) is determined by the structure of the; cation, the nature and occupancy of its external orbitals, and charge. The results were interpreted on the basis of the hypothesis that upper electron excited states of the emitter are involved in the bioluminescence process. Based on thermodynamic calculations, the type of the effect was related to the energetic characteristics of the cation, Presumably, the mechanism of action of cations is determined by their involvement in the formation and deactivation of electron excited states in the bioluminescence process.

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Держатели документа:
Russian Acad Sci, Inst Biophys, Siberian Div, Krasnoyarsk 660036, Russia
ИБФ СО РАН : 660036, Красноярск, Академгородок, д. 50, стр. 50

Доп.точки доступа:
Kydryasheva, N.S.; Zuzikova, E.V.; Gutnik, T.V.

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13.

Evaluation of the effect of light intensity on the measurement of the photosynthetic rate in plankton microalgae by the chlorophyll fluorescence method [Text] / N. A. Gaevskii [et al.] // Russ. J. Plant Physiol. - 2000. - Vol. 47, Is. 6. - P. 820-825, DOI 10.1023/A:1026671531500. - Cited References: 21 . - ISSN 1021-4437

РУБ Plant Sciences
Рубрики:
QUANTUM YIELDS
   PHYTOPLANKTON
   CHLOROPLASTS
   ALGAE
Кл.слова (ненормированные):
fluorescence -- chlorophyll -- microalgae -- photosynthetic rate -- photosynthetic activity
Аннотация: The use of relative variable fluorescence (RVF) of chlorophyll, as measured in the presence of Diuron, an inhibitor of electron transfer, for the estimation of the photosynthetic activity of plankton microalgae was analyzed under a wide range of light intensities in the PAR region. Oxygen evolution rates (estimated by the method of light and dark bottles and the amperometric method), RVF, and chlorophyll a concentration were measured in parallel in natural algal cenoses and microecosystems. When the previously used regression equation, in the form A = b(DeltaF/F-d)CchlI, where A is O-2 evolution rate (g/(m(3) h), DeltaF/F-d is RVF (relative units), C-chl is chlorophyll a concentration (mg/m(3)), and I is light intensity (W/m(2)), was verified in the PAR region, we observed a nonlinear dependence of the correction coefficient b on I, which can be described by the formula b = 6.227 x 10(3)rootI. This result agrees with the hypothesis that chlorophyll a fluorescence quenching comprises photochemical (qQ) and energy (qE) components. On the basis of the energy model, we determined the upper limit b(max) = 0.003 for light intensity range I < 4.4 W/m(2) and the lower limit b(min) = 0.0003 for I = 400 W/m(2).

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Держатели документа:
Krasnoyarsk State Univ, Dept Biol, Krasnoyarsk 660036, Russia
Russian Acad Sci, Siberian Div, Inst Biophys, Krasnoyarsk 660036, Russia
ИБФ СО РАН : 660036, Красноярск, Академгородок, д. 50, стр. 50

Доп.точки доступа:
Gaevskii, N.A.; Kolmakov, V.I.; Popel'nitskii, V.A.; Gold, V.M.; Dubovskaya, O.P.

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14.

Effects of the bacterial component on the viability of the Paramecium bursaria symbiotic complex (infusorian-zoochlorella) [Text] / Y. V. Barkhatov, E. B. Khromechek, V. G. Gubanov // Russ. J. Ecol. - 2001. - Vol. 32, Is. 4. - P. 261-265, DOI 10.1023/A:1011314622045. - Cited References: 12 . - ISSN 1067-4136

РУБ Ecology

Кл.слова (ненормированные):
Paramecium bursaria -- endosymbiosis -- matter exchange cycle
Аннотация: A hypothesis is considered that the establishment and maintenance of mass exchange processes in the Paramecium bursaria symbiotic complex (infusorian-alga) depends on the presence of the third component-bacteria-whose role is underestimated but essential for completing the exchange cycle. The role of this component in the symbiotic cycle of Paramecium bursaria is possible to reveal using special bactericidal preparations specifically inhibiting the bacteria involved in the metabolic cycle but having no effect on the functions of the host cell and the zoochlorella population. Experiments with various preparations of this type were performed, and the response to treatment was estimated from growth rates of the symbiotic complex and its components. This allowed identification of an antibiotic (rifampicin) that had no adverse influence on free-living zoochlorella and chlorella-free paramecia (the basic components of the symbiotic cycle) but drastically inhibited the growth of the P. bursaria symbiotic complex, which could be interpreted as evidence in favor of the hypothesis concerning the existence of the third symbiotic component.

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Держатели документа:
Russian Acad Sci, Siberian Div, Inst Biophys, Krasnoyarsk 660036, Russia
ИБФ СО РАН : 660036, Красноярск, Академгородок, д. 50, стр. 50

Доп.точки доступа:
Barkhatov, Y.V.; Khromechek, E.B.; Gubanov, V.G.

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15.

Estimation of energy of the upper electron-excited states of the bacterial bioluminescent emitter [Text] / N. S. Kudryasheva [et al.] // J. Photochem. Photobiol. B-Biol. - 2002. - Vol. 68, Is. 02.03.2013. - P. 88-92, DOI 10.1016/S1011-1344(02)00360-3. - Cited References: 25 . - ISSN 1011-1344

РУБ Biochemistry & Molecular Biology + Biophysics
Рубрики:
MECHANISM
Кл.слова (ненормированные):
bioluminescence -- electron-excited states -- energy transfer
Аннотация: The hypothesis of activity of the upper electron-excited states of the bacterial bioluminescent emitter was verified using dye molecules as foreign energy acceptors. Six compounds were selected having fluorescent state energies ranging from 25 700 to 32 000 cm(-1) (anthracene, pyrene, 1.4-bis(5-phenyloxasol-2-yl)benzene (POPOP), p-bis(o-methylstyryl)benzene (MSB), 2-methoxy-naphtalene, p-terphenyl), exceeding that of the bioluminescent emitter (22 000 cm(-1)). Their absorption spectra do not overlap with the bioluminescence spectrum; the trivial light absorption and the intermolecular resonance S-S energy transfer were excluded. Bacterial bioluminescent spectra of the coupled enzyme system NADH:FMN-oxidoreductase-luciferase in the presence of MSB were presented as an example. The weak sensitized fluorescence of MSB was registered. The results obtained have confirmed the activity of the energetic precursor in the bacterial bioluminescence. Its energy can be located in the interval of 26 000-27 000 cm(-1). (C) 2002 Published by Elsevier Science B.V.

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Держатели документа:
Russian Acad Sci, Inst Biophys, Siberian Branch, Akademgorodok 660036, Krasnoyarsk, Russia
Krasnoyarsk State Univ, Krasnoyarsk 660049, Russia
Wageningen Univ, Microspect Ctr, Dept Biomol Sci, NL-6703 HA Wageningen, Netherlands
ИБФ СО РАН : 660036, Красноярск, Академгородок, д. 50, стр. 50

Доп.точки доступа:
Kudryasheva, N.S.; Nemtseva, E.V.; Sizykh, A.G.; Kratasyuk, V.A.; Visser, AJWG

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16.

Individual-based model of the reproduction cycle of Moina macrocopa (Crustacea : Cladocera) [Text] / E. S. Zadereev [et al.] // Ecol. Model. - 2003. - Vol. 162, Is. 01.02.2013. - P. 15-31, DOI 10.1016/S0304-3800(02)00348-4. - Cited References: 25 . - ISSN 0304-3800

РУБ Ecology
Рубрики:
POPULATION
   ZOOPLANKTON
   FEMALES
   WATER
Кл.слова (ненормированные):
individual-based model -- Cladocera -- change of reproduction mode -- metabolic by-products
Аннотация: An individual-based model of cyclic development of Cladocera populations was developed on the basis of experimental data. The model takes into account the following processes describing the development of an individual animal: maturation, transition into other reproductive classes, selection of the reproduction mode (parthenogenetic or gamogenetic), release of parthenogenetic progeny and death. The model assumes that switching from asexual to sexual reproduction is controlled by the concentration of food and metabolic by-products of the animal population. Verification of the model by independent experiments demonstrated that (1) during population growth, metabolic by-products build up in the medium, and (2) the effect of metabolic by-products on gamogenesis induction depends on concentration. The hypothesis that the effect of regulating reproductive switching factors should synchronise the development of population with the change of environmental conditions in order to ensure production of the maximum number of diapausing eggs was tested. It is shown that combination of regulating reproductive switching factors maximises the production of diapausing eggs. (C) 2002 Elsevier Science B.V. All rights reserved.

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Держатели документа:
Russian Acad Sci, Inst Biophys, Krasnoyarsk 660036, Russia
ИБФ СО РАН : 660036, Красноярск, Академгородок, д. 50, стр. 50

Доп.точки доступа:
Zadereev, E.S.; Prokopkin, I.G.; Gubanov, V.G.; Gubanov, M.V.

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17.

Fatty acid composition of Cladocera and Copepoda from lakes of contrasting temperature [Text] / M. I. Gladyshev [et al.] // Freshw. Biol. - 2015. - Vol. 60, Is. 2. - P373-386, DOI 10.1111/fwb.12499. - Cited References:88. - The work was supported by the project No. 6.1089.214/K of SiberianFederal University, carried out according to Federal Tasks of Ministryof Education and Science of Russian Federation, and partly supported bygrant of Russian Foundation for Basic Research (RFBR) No. 14-04-00087.We are grateful to Dr. G. Kirillin, Dr. H.-P. Grossart and Dr. P.Kasprzak for their kind help during sampling at Lake Stechlin and to Dr.M.A. Baturina for valuable assistance at Bolshezemelskaya tundra lakes. . - ISSN 0046-5070. - ISSN 1365-2427

РУБ Marine & Freshwater Biology
Рубрики:
FRESH-WATER ZOOPLANKTON
   SEASONAL DYNAMICS
   DAPHNIA-GALEATA
   TROPHIC
Кл.слова (ненормированные):
climate warming -- essential polyunsaturated fatty acids -- temperature -- adaptation -- zooplankton
Аннотация: We studied the fatty acid (FA) composition of six species of Cladocera and six species of Copepoda from five cold-water lakes, situated in the tundra and/or in the mountains, and eight species of Cladocera and four species of Copepoda from eight warm-water lakes (including one reservoir) in temperate regions. We asked whether the contrasting temperature would result primarily simply in changes in the percentages (i.e. percentage of total FAs) and absolute contents (quantities) of the long-chain polyunsaturated fatty acids (PUFAs), eicosapentaenoic acid (20:5n-3, EPA) and docosahexaenoic acid (22:6n-3, DHA), or whether there are other FAs with various number of double bonds and/or chain lengths which could be responsible for a putative homeoviscous adaptation. We also aimed to reveal any consistent phylogenetic differences in FA percentages and contents between Cladocera and Copepoda, separable from any temperature effects. Both taxa in warm waters had greater percentages of 18:0, and lower percentages of 14:0 and 18:4n-3, than in cold waters, but there were no differences in percentages of DHA. In addition, Cladocera, besides the lower percentage of EPA, had higher percentages of 20:0 and 22:0 in warm waters. These patterns in the percentages of 14:0, 18:0, 18:4n-3, 20:0 and 22:0 are in a good agreement with the hypothesis of homeoviscous adaptation. Thus, the role of EPA, and particularly DHA, as unique regulators of the homeoviscous adaptation of the zooplankton may have been overestimated. Overall, we confirmed the known differences between Cladocera and Copepoda, namely higher percentages of EPA in Cladocera and higher percentages of DHA in Copepoda. However, there was c.50% overlap in the ranges of the percentage of EPA in Cladocera and Copepoda, while the ranges in the content of EPA per unit organic carbon in Cladocera and Copepoda overlapped completely. Differences in the percentages and content of DHA between Cladocera and Copepoda were statistically significant and invariant with temperature, and therefore are probably due to phylogenetic factors, rather than any temperature adaptation. Contrasting temperature was not associated with significant differences in the contents of EPA and DHA per unit of organic carbon within the taxa studied. If this remained the case in a warming climate, such warming would be unlikely to reduce the accumulation of these important PUFAs in the zooplankton, at least if species composition was unchanged. However, if there were shifts in the proportions of Cladocera and Copepoda in the zooplankton, for example fewer copepods as temperature rises, a decrease of the flux of PUFA in the ecosystem is plausible, taking into account the phylogenetic (and temperature invariant) differences in DHA between the two groups.

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Держатели документа:
Russian Acad Sci, Inst Biophys, Siberian Branch, Krasnoyarsk, Russia.
Siberian Fed Univ, Krasnoyarsk, Russia.
Natl Acad Sci Belarus Bioresources, Sci & Pract Ctr, Minsk, Byelarus.
Russian Acad Sci, Inst Biol, Komi Sci Ctr, Ural Div, Syktyvkar, Russia.
Russian Acad Sci, AN Severtsov Inst Ecol & Evolut, Moscow, Russia.
ИБФ СО РАН

Доп.точки доступа:
Gladyshev, Michail I.; Sushchik, Nadezhda N.; Dubovskaya, Olga P.; Buseva, Zhanna F.; Makhutova, Olesia N.; Fefilova, Elena B.; Feniova, Irina Y.; Semenchenko, Vitaliy P.; Kolmakova, Anzhelika A.; Kalachova, Galina S.; Siberian Federal University [6.1089.214/K]; Russian Foundation for BasicResearch (RFBR) [14-04-00087]

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18.

A hypothesis about double surging climate change in the 20th century [Text] / P. V. Belolipetskii, S. I. Bartsev, A. G. Degermendzhi // Dokl. Earth Sci. - 2015. - Vol. 460, Is. 1. - P46-49, DOI 10.1134/S1028334X1501002X. - Cited References:15. - This work was supported by the Program of presidium of Russian Academyof Science "Research Scientific Studies for Development of Arctic Zoneof the Russian Federation," project no. 12. . - ISSN 1028-334X. - ISSN 1531-8354

РУБ Geosciences, Multidisciplinary
Рубрики:
REGIME SHIFTS
   NORTH PACIFIC
   OCEAN
   SYSTEM
   HEAT

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Scopus
Держатели документа:
Russian Acad Sci, Siberian Branch, Inst Computat Modeling, Krasnoyarsk, Russia.
Russian Acad Sci, Inst Biophys, Siberian Branch, Krasnoyarsk, Russia.
ИВМ СО РАН
ИБФ СО РАН

Доп.точки доступа:
Belolipetskii, P.V.; Bartsev, S.I.; Degermendzhi, A.G.; presidium of Russian Academy of Science "Research Scientific Studies forDevelopment of Arctic Zone of the Russian Federation" [12]

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19.

Effect of season and trophic level on fatty acid composition and content of four commercial fish species from Krasnoyarsk Reservoir (Siberia, Russia) / N. N. Sushchik, A. E. Rudchenko, M. I. Gladyshev // Fish. Res. - 2017. - Vol. 187. - P178-187, DOI 10.1016/j.fishres.2016.11.016 . - ISSN 0165-7836
Кл.слова (ненормированные):
Fatty acids -- Piscivorous and omnivorous fish -- Season -- Stable isotopes -- Trophic level
Аннотация: Two groups of factors, phylogenetic and ecological, are presently regarded as controlling fatty acid composition of fish, including essential eicosapentaenoic (EPA) and docosahexaenoic (DHA) acids. Environmental effects, e.g., trophic position, temperature and/or seasonality, were previously studied using sums of fatty acids or only their level data. We tested the hypothesis that differences in trophic levels of piscivorous (pike and perch) and omnivorous (roach and bream) fish from a mesotrophic reservoir allow discriminating levels and contents of individual fatty acids, especially EPA and DHA. The more established measurements, i.e., stomach contents and carbon and nitrogen stable isotopes in fish muscles, were also carried out to provide linkages between the different ecological tracers, fatty acids versus stable isotopes, and matching the methods for long-term food sources (fatty acids and stable isotopes) and recent foraging (stomach content analysis). We also studied a putative influence of seasonality. Similar to other studies, there were seasonal changes in fatty acid composition and contents of two fish, perch and roach, due to direct and indirect effects of water temperature. Meanwhile, the piscivorous and omnivorous species captured in the same month, were explicitly differentiated on a base of stable isotopes and fatty acids. Significantly higher percentages and contents of DHA in piscivorous fish, perch and pike, relatively to those in roach and bream, likely indicated a higher trophic transfer efficiency for this essential fatty acid. All the fishes have commercial importance for regional fishery and are harvested from the studied reservoir for human nutrition. Regarding content of EPA + DHA (mg g?1 fish) as the indicator of nutritive value for humans, pike had the highest nutritive value, roach and perch had intermediate overlapped values, and bream was of the least benefit. © 2016 Elsevier B.V.

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Держатели документа:
Institute of Biophysics of Federal Research Center “Krasnoyarsk Science Center” of Siberian Branch of Russian Academy of Sciences, Akademgorodok, 50/50, Krasnoyarsk, Russian Federation
Siberian Federal University, Svobodny av, 79, Krasnoyarsk, Russian Federation

Доп.точки доступа:
Sushchik, N. N.; Rudchenko, A. E.; Gladyshev, M. I.

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20.

Developing of discrimination experiment to find most adequate model of plant's multi-nutrient functional response / M. Yu Saltykov, S. I. Bartsev // IOP Conference Series: Materials Science and Engineering : Institute of Physics Publishing, 2017. - Vol. 173: 5th International Workshop on Mathematical Models and their Applications 2016, IWMMA 2016 (7 November 2016 through 9 November 2016, ) Conference code: 126825, Is. 1, DOI 10.1088/1757-899X/173/1/012017
Кл.слова (ненормированные):
Ecology -- Metabolism -- Physiology -- Adequate models -- Complex model -- Discrimination experiments -- Ecological models -- Functional response -- Trophic level -- Typical patterns -- Nutrients
Аннотация: To create reliable Closed Ecological Life Support Systems (CELSS) it is necessary to have models which can predict CELSS dynamic with good accuracy. However it was shown that conventional ecological models cannot describe CELSS correctly if it is closed by more than one element. This problem can be solved by means more complex models than conventional ones - so called flexible metabolism models. However it is possible that CELSS also can be described correctly in "semi-conventional" framework - when only one trophic level is described by flexible metabolism model. Another problem in CELSS modeling is existence of different and incompatible hypotheses about relationships between plants growth rate and amounts of nutrients (functional responses). Difficulty of testing these hypotheses is associated with multi-nutrient dependency of growth rate and comprehensive experimental studies are expensive and time-consuming. This work is devoted to testing the hypothesis that "semi-conventional" approach is enough to describe CELSS, and to planning the discrimination experiment on selecting correct type of the plant's functional response. To do that three different models of plants (one flexible and two conventional) were investigated both in the scope of CELSS model, and in hemostat model. Numerical simulations show that each of the models has typical patterns which can be determined in experiment with real plants. © Published under licence by IOP Publishing Ltd.

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Держатели документа:
Institute of Biophysics SB RAS, Akademgorodok 50-50, Krasnoyarsk, Russian Federation

Доп.точки доступа:
Yu Saltykov, M.; Bartsev, S. I.

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