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Carotenoids in bottom sediments of lake Shira as a paleoindicator for reconstruction of Lake States in Khakassiya, Russia / V. V. Zykov [et al.] // Contemporary Problems of Ecology. - 2012. - Vol. 5, Is. 4. - P434-442, DOI 10.1134/S199542551204018X . - ISSN 1995-4255
Кл.слова (ненормированные):
anaerobiosis -- bottom sediments -- holomixis -- meromixis -- okenone -- bacterium -- bioindicator -- biomarker -- carotenoid -- Holocene -- lacustrine deposit -- meromixis -- molecular analysis -- paleoclimate -- photoautotrophy -- reconstruction -- Khakassia -- Lake Shira -- Russian Federation
Аннотация: The concentrations of carotenoids buried in the bottom sediments of Lake Shira (Siberia, Khakassiya) have analyzed for the period of the last 2300 years. The bottom sediments were found to contain carotenoids, which are molecular markers of the corresponding groups of Phototrophic organisms. The bottom sediments of Lake Shira were shown to be a promising object for climate reconstructions of the Late Holocene in southern Siberia. В© 2012 Pleiades Publishing, Ltd.

Scopus
Держатели документа:
Institute of Biophysics, Siberian Branch, Russian Academy of Sciences, Akademgorodok 5, build. 50, Krasnoyarsk 660036, Russian Federation
Siberian Federal University, Svobodnyi pr. 79, Krasnoyarsk 660041, Russian Federation
Sobolev Institute of Geology and Mineralogy, Siberian Branch, Russian Academy of Sciences, Acedemika Koptyuga pr. 3, Novosibirsk 630090, Russian Federation : 660036, Красноярск, Академгородок, д. 50, стр. 50

Доп.точки доступа:
Zykov, V.V.; Rogozin, D.Y.; Kalugin, I.A.; Dar'in, A.V.; Degermendzhi, A.G.

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Carotenoids of phototrophic organisms in bottom sediments of meromictic Lake Shira (Siberia, Russia) as an indicator of past stratification / D. Y. Rogozin [et al.] // Doklady Biological Sciences. - 2011. - Vol. 439, Is. 1. - P228-231, DOI 10.1134/S0012496611040077 . - ISSN 0012-4966
Кл.слова (ненормированные):
carotenoid -- chlorophyll -- water -- animal -- article -- chemistry -- ecosystem -- lake -- metabolism -- microbiology -- photosynthesis -- phototrophy -- pigmentation -- Russian Federation -- sediment -- Animals -- Carotenoids -- Chlorophyll -- Ecosystem -- Geologic Sediments -- Lakes -- Photosynthesis -- Phototrophic Processes -- Pigmentation -- Russia -- Siberia -- Water -- Water Microbiology

Scopus
Держатели документа:
Institute of Biophysics, Siberian Branch, Russian Academy of Sciences, Akademgorodok 5050, Krasnoyarsk 660036, Russian Federation
Institute of Geology and Mineralogy, Siberian Branch, Russian Academy of Sciences, pr. Akademika Koptyuga 3, Novosibirsk 630090, Russian Federation : 660036, Красноярск, Академгородок, д. 50, стр. 50

Доп.точки доступа:
Rogozin, D.Y.; Zykov, V.V.; Kalugin, I.A.; Daryin, A.V.; Degermendzhy, A.G.

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Okenone in Bottom Sediments as a Proxy for Changes in the Water Level of a Saline Stratified Lake / D. Y. Rogozin, V. V. Zykov, A. O. Bulkhin, A. G. Degermendzhi // Dokl. Earth Sci. - 2020. - Vol. 493, Is. 1. - P565-568, DOI 10.1134/S1028334X20070168. - Cited References:8. - This work was supported by the Russian Foundation for Basic Research, project no. 19-05-00428. . - ISSN 1028-334X. - ISSN 1531-8354

РУБ Geosciences, Multidisciplinary
Рубрики:
SHIRA
SIBERIA
CYCLES
Кл.слова (ненормированные):
okenone -- purple sulfur bacteria -- meromixis -- water level -- stratification -- climate reconstruction
Аннотация: Long-term measurements show that the sedimentation dynamics of okenone (a carotenoid of purple sulfur bacteria) reflects the abundance of purple sulfur bacteria, the hydrogen sulfide content, and the stratification stability in the closed saline meromictic Shira Lake (Southern Siberia, Russia). The profile of fossil okenone in bottom sediments has been compared with the data on the water surface level in the lake over the last 100 years. The peaks of okenone correspond to lake transgressions, and the drops in the okenone content coincide with periods of stable or decreasing water level. Our observations show that fossil okenone may be used as a qualitative proxy of meromictic conditions and as a quantitative proxy of the water level dynamics in closed stratified lakes. Therefore, okenone can be used for qualitative reconstructions of the water balance and climate humidity in arid zones.

WOS
Держатели документа:
Russian Acad Sci, Inst Biophys, Siberian Branch, Krasnoyarsk 660036, Russia.
Siberian Fed Univ, Krasnoyarsk 660041, Russia.

Доп.точки доступа:
Rogozin, D. Y.; Zykov, V. V.; Bulkhin, A. O.; Degermendzhi, A. G.; Russian Foundation for Basic ResearchRussian Foundation for Basic Research (RFBR) [19-05-00428]

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Influence of NaCl on Productivity and Fluorescence Parameters of Nasturtium officinale R. Br. and Its Relevance to Artificial Closed Ecosystems / A. M. Pavlova, N. A. Gaevskii, O. V. Anishchenko [et al.] // Russ. J. Plant Physiol. - 2021. - Vol. 68, Is. 6. - P1173-1185, DOI 10.1134/S1021443721050137. - Cited References:27. - This work was supported by the fundamental research program of the Russian Academy of Sciences for 2013-2020, project no. 56.1.4 Sustainability of Higher Plant Cenoses Grown on Nutrient Media with Mineralized Organic Waste in Closed Human-Inhabited Ecological Systems. . - ISSN 1021-4437. - ISSN 1608-3407

РУБ Plant Sciences
Рубрики:
CHLOROPHYLL FLUORESCENCE
   SALT STRESS
   TOLERANCE
   PHOTOSYNTHESIS
Кл.слова (ненормированные):
Nasturtium officinale -- glycophyte -- salt tolerance -- photosynthetic -- apparatus -- closed ecosystems
Аннотация: Productivity values, sodium accumulation in aboveground biomass, and photosynthetic indices of watercress (Nasturtium officinale) leaves were investigated under conditions resembling artificial closed ecological systems (CES). The seedlings were grown on nutrient media with various NaCl concentrations (0.7, 1.4, and 1.8 g/L) for 7, 14, and 19 days after transferring them to saline solutions. The productivity of plants on the seventh day of their growth on saline media did not differ from that of control plants. The decrease in plant productivity was noted in all the treatments starting from the 14th day after transferring the plants to saline solutions. When NaCl concentration in the nutrient solution was raised from 0.7 to 1.8 g/L, a significant increase in relative Na+ content in plant tissues was observed, regardless of the duration of NaCl treatment. A substantial decrease in chlorophyll (a + b) to carotenoid content ratio was noted on the seventh and 14th days in plants grown at 1.8 g/L NaCl. In plants treated for 7 days with 0.7 and 1.4 g/L NaCl, the content of chlorophylls a and b and carotenoids was found to increase, which indicates the tolerance of N. officinale to CES conditions. The relative content of chlorophylls a and b in the light-harvesting chlorophyll (a + b) complex was independent of the extent of salinity. The maximum quantum yield of photosystem II reaction in N. officinale plants had typically high values (Y(II)(max) of 0.755 +/- 0.007). Using the Imaging Maxi version of the pulse amplitude-modulated (PAM) fluorometer, it was found that light curves for the effective quantum yield of photochemical and nonphotochemical fluorescence quenching (Y(II) and Y(NPQ), respectively) differed appreciably between the salt-treated and untreated plants in the case of long-term cultivation (19 days) at 0.7 and 1.4 g/L NaCl. The treatment with 1.8 g/L NaCl for the period from 14 to 19 days had no effect on light curves of Y(II) and Y(NPQ). It is argued that N. officinale can be used as a source of NaCl for humans under CES conditions.

WOS
Держатели документа:
Siberian Fed Univ, Krasnoyarsk, Russia.
Russian Acad Sci, Inst Biophys, Siberian Branch, Krasnoyarsk, Russia.
Reshetnev Siberian State Univ Sci & Technol, Krasnoyarsk, Russia.

Доп.точки доступа:
Pavlova, A. M.; Gaevskii, N. A.; Anishchenko, O. V.; Tikhomirova, N. A.; Tikhomirov, A. A.; fundamental research program of the Russian Academy of SciencesRussian Academy of Sciences [56.1.4]

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