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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Kolmakov V.I., Levin L.A., Dubovskaya O.P., Gladyshev M.I.
Заглавие : A circadian rhythm of grazing of microalgae by a laboratory culture of Ceriodaphnia quadrangula
Колич.характеристики :4 с
Место публикации : Biofizika: MEZHDUNARODNAYA KNIGA, 2002. - Vol. 47, Is. 4. - P673-676. - ISSN 0006-3029
Примечания : Cited References: 12
Предметные рубрики: CLOSED CULTIVATORS
FLUORESCENCE
ZOOPLANKTON
Ключевые слова (''Своб.индексиров.''): daily rhythm of grazing--fluorescence--microalgae--flowing-through cultivator--photoperiod--statistical spectral analysis
Аннотация: The circadian rhythm of grazing of microalgae by a laboratory culture of Ceriodaphnia quadrangula under continuous illumination was studied by continuous registration of chlorophyll fluorescence at the outlet of a flow-through cultivator. A culture of green alga Chlorella vulgaris was used as a feed. The data obtained were treated by the statistical spectral analysis. It was found that animals preliminarily grown under a 12 h light : 12 h dark regime and transferred to constant light showed two maxima in the circadian rhythm of grazing with periods of 0.7 and 1.1 h. Animals preliminarily grown under constant light showed no circadian rhythm of grazing. It was concluded that the circadian rhythm of grazing of C quadrangula has endogenous nature and can change according to light conditions.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Kolmakov V.I., Levin L.A., Dubovskaya O.P., Gladyshev M.I.
Заглавие : A circadian rhythm of grazing of microalgae by a laboratory cultureof Ceriodaphnia quadrangula
Место публикации : Biofizika. - 2002. - Vol. 47, Is. 4. - С. 676. - ISSN 00063029 (ISSN)
Ключевые слова (''Своб.индексиров.''): daily rhythm of grazing--flowing-through cultivator--fluorescence--microalgae--photoperiod--statistical spectral analysis--algae--animalia--ceriodaphnia quadrangula--chlorella vulgaris--chlorophyta
Аннотация: The circadian rhythm of grazing of microalgae by a laboratory culture of Ceriodaphnia quadrangula under continuous illumination was studied by continuous registration of chlorophyll fluorescence at the outlet of a flow-through cultivator. A culture of green alga Chlorella vulgaris was used as a feed. The data obtained were treated by the statistical spectral analysis. It was found that animals preliminarily grown under a 12 h light : 12 h dark regime and transferred to constant light showed two maxima in the circadian rhythm of grazing with periods of 0.7 and 1.1 h. Animals preliminarily grown under constant light showed no circadian rhythm of grazing. It was concluded that the circadian rhythm of grazing of C. quadrangula has endogenous nature and can change according to light conditions.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Prokopkin I.G., Barkhatov Y.V., Khromechek E.B.
Заглавие : A one-dimensional model for phytoflagellate distribution in the meromictic lake
Колич.характеристики :8 с
Коллективы : Russian Foundation for Basic Research (RFBR) [13-04-01514]; Integrative Project of Siberian Branch of Russian Academy of Sciences [56]
Место публикации : Ecol. Model.: ELSEVIER SCIENCE BV, 2014. - Vol. 288. - P1-8. - ISSN 0304-3800, DOI 10.1016/j.ecolmode1.2014.05.011. - ISSN 1872-7026
Примечания : Cited References: 22. - This work was supported by Russian Foundation for Basic Research (RFBR) No. 13-04-01514 and Integrative Project of Siberian Branch of Russian Academy of Sciences No. 56. The anonymous reviewers are kindly acknowledged for valuable suggestions and criticism.
Предметные рубрики: VERTICAL-DISTRIBUTION
CHLOROPHYLL MAXIMUM
SOUTH SIBERIA
RUSSIA
KHAKASIA
SHIRA
CRYPTOPHYTES
CRYPTOMONAS
CHEMOCLINE
MIGRATION
Ключевые слова (''Своб.индексиров.''): phytoflagellates--meromictic lake--simulation modeling--lake shira
Аннотация: Using mathematical modeling methods, the work investigates possible existence of a phytoflagellate population in the ecosystem of a stratified lake (Lake Shira, Khakasia, Russia). Until this study was carried out, no phytoflagellate population had been detected in the lake, although there had been indirect evidence of the possible presence of a cryptomonad population in this water body. To answer the question if this population may be present in this water body, as the first step of investigation, a mathematical model was developed describing the microorganism biomass dynamics and phytoflagellate relationship with the lake food web. The calculations showed that cryptophytic algae were abundant in the water column layers above the lake chemocline at the beginning of summer but showed low biomass concentrations during other periods of time. In the summer following the construction of the model, samples were collected from Lake Shira, as the next step of the study. A cryptophytic algae population was found in the water column, and the pattern of its distribution in the ecosystem was similar to that predicted by the model. In addition to that, we studied theoretically possible reasons for the early summer development of the population in the deep water layers and found that it was the result of the mixotrophic feeding strategy of cryptomonads and trophic interactions in the food web. The study shows that preliminary modeling of the locational and temporal distribution of populations whose presence in the ecosystem is only suggested by indirect evidence may be useful as a tool for searching for the species in natural ecosystems and as an approach enabling a more accurate description of the food web structure of a water body. (C) 2014 Elsevier B.V. All rights reserved.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Sid'ko A.F.
Заглавие : A study of the spectral brightness and reflectance of the Krasnoyarsk and Dnepr reservoir systems
Место публикации : Oceanology. - 2005. - Vol. 45, Is. 2. - С. 186-193. - ISSN 00014370 (ISSN)
Ключевые слова (''Своб.индексиров.''): alga--brightness temperature--phytoplankton--remote sensing--reservoir--spectral reflectance--dneprodzerzhinsk reservoir--eastern europe--eastern hemisphere--eurasia--europe--krasnoyarsk [russian federation]--russian federation--ukraine--world--algae--bacillariophyta--chlorophyta--cyanobacteria--dinophyceae--protococcus--uncultured cyanobacterium
Аннотация: The brightness spectra of the Krasnoyarsk and Dnepr reservoir systems are presented for various periods of their development, from the beginning of their filling to the final stage of their formation. The curves of the surface distribution of chlorophyll a, which were remotely obtained from the brightness coefficient spectra, are found to be monotonic when diatomaceous, green protococcus, and dinophyte algae dominate in the phytoplankton. In the presence of blue-green algae, the curve of the distribution of phytoplankton on the surface is essentially irregular. The irregularities range from tens to hundreds of meters with sharp gradients of the phytoplankton concentration. The negative values of the VI color index change for positive ones when the concentration of chlorophyll a of the phytoplankton in the subsurface layer Cchl > 250-270 mg/m3. This is associated with the change in the species composition of the phytoplankton from the dominating diatom forms to bluegreen algae. Copyright В© 2005 by Pleiades Publishing, Inc.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Shevyrnogov A..., Vysotskaya G..., Shevyrnogov E...
Заглавие : A study of the stationary and the anomalous in the ocean surface chlorophyll distribution by satellite data
Колич.характеристики :5 с
Место публикации : Int. J. Remote Sens.: TAYLOR & FRANCIS LTD, 2004. - Vol. 25: Oceans from Space Venice 2000 Symposium (OCT 09-13, 2000, Venice, ITALY), Is. 07.08.2013. - P1383-1387. - ISSN 0143-1161, DOI 10.1080/01431160310001592337
Примечания : Cited References: 8
Аннотация: Variability of chlorophyll concentration in the ocean is one of the most important components of the primary production process on the planet. To preserve the biosphere and to make appropriate use of it, it is imperative to have a deep insight into the long-term dynamics of the primary production on the planet. To investigate the dynamics of chlorophyll concentration based on satellite data, the Institute of Biophysics (Russian Academy of Sciences, Siberian Branch) has developed a geoinformation system. It was used to detect the areas in the global ocean that are quasistationary in relation to seasonal dynamics of chlorophyll concentration. Areas such as these, found in the Indian Ocean, are described in this work. These areas form the basis for the analysis of long-term dynamics of chlorophyll concentration. In these quasistationary zones systematic monitoring of phytopigment concentration is conducted by space-borne and marine craft. The work presents long-term satellite-based data on the space distribution of anomalous deviations of chlorophyll concentration in the ocean. An anomaly criterion is proposed and maps of Pacific Ocean areas with a high probability of anomalies are presented.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Shevyrnogov A., Vysotskaya G., Shevyrnogov E.
Заглавие : A study of the stationary and the anomalous in the ocean surface chlorophyll distribution by satellite data
Место публикации : International Journal of Remote Sensing. - 2004. - Vol. 25, Is. 7-8. - С. 1383-1387. - ISSN 01431161 (ISSN)
Ключевые слова (''Своб.индексиров.''): chlorophyll--data reduction--oceanography--planets--probability--satellite communication systems--biospheres--remote sensing--chlorophyll--concentration (composition)--remote sensing--satellite data--sea surface
Аннотация: Variability of chlorophyll concentration in the ocean is one of the most important components of the primary production process on the planet. To preserve the biosphere and to make appropriate use of it, it is imperative to have a deep insight into the long-term dynamics of the primary production on the planet. To investigate the dynamics of chlorophyll concentration based on satellite data, the Institute of Biophysics (Russian Academy of Sciences, Siberian Branch) has developed a geoinformation system. It was used to detect the areas in the global ocean that are quasistationary in relation to seasonal dynamics of chlorophyll concentration. Areas such as these, found in the Indian Ocean, are described in this work. These areas form the basis for the analysis of long-term dynamics of chlorophyll concentration. In these quasistationary zones systematic monitoring of phytopigment concentration is conducted by space-borne and marine craft. The work presents long-term satellite-based data on the space distribution of anomalous deviations of chlorophyll concentration in the ocean. An anomaly criterion is proposed and maps of Pacific Ocean areas with a high probability of anomalies are presented. В© 2004 Taylor and Francis Ltd.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : PARAMONOV L.E.
Заглавие : A THEORETICAL-ANALYSIS OF OPTICAL-ABSORPTION SPECTRA OF ALGAE
Колич.характеристики :6 с
Место публикации : Okeanologiya: MEZHDUNARODNAYA KNIGA, 1995. - Vol. 35, Is. 5. - P719-724. - ISSN 0030-1574
Примечания : Cited References: 30
Предметные рубрики: NATURAL-WATERS
PHYTOPLANKTON PIGMENTS
LIGHT
ATTENUATION
CELLS
CHLOROPHYLL
SCATTERING
COASTAL
Аннотация: The formula for the absorption cross sections of macroscopically isotropic volume element which consists of ''soft'' particles is proposed. The transformation formula for absorption cross sections on disperse composition is given. The dependence of absorption spectra of green, blue-green and diatom algae on microstructure of suspension is considered. Some inverse problems are discussed.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : NESTERENKO T.V., SIDKO F.Y.
Заглавие : AGE-CHANGES OF SLOW FLUORESCENCE INDUCTION IN WHEAT LEAF CHLOROPHYLL
Колич.характеристики :7 с
Место публикации : SOVIET PLANT PHYSIOLOGY: PLENUM PUBL CORP, 1985. - Vol. 32, Is. 3. - P344-350. - ISSN 0038-5719
Примечания : Cited References: 27
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Nesterenko T.V., Tikhomirov A.A.
Заглавие : An ontogenetic approach to the assessment of plant resistance to stress factors based on the method of chlorophyll fluorescence induction.
Место публикации : Doklady. Biochemistry and biophysics. - 2003. - Vol. 388. - С. 4-7. - ISSN 16076729 (ISSN)
Ключевые слова (''Своб.индексиров.''): chlorophyll--adaptation--aging--article--comparative study--cucumber--light--metabolism--methodology--photostimulation--photosynthesis--physiology--plant leaf--radiation dose--radiation exposure--spectrofluorometry--adaptation, physiological--aging--chlorophyll--cucumis sativus--light--photic stimulation--photosynthetic reaction center complex proteins--plant leaves--radiation dosage--spectrometry, fluorescence
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10.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Nesterenko T.V., Tikhomirov A.A., Shikhov V.N., Zavorueva E.N.
Заглавие : Assessment of plant leaf response to long-term exposure at high temperature using the method of thermoinduced chlorophyll fluorescence.
Место публикации : Doklady. Biochemistry and biophysics. - 2001. - Vol. 378. - С. 165-169. - ISSN 16076729 (ISSN)
Ключевые слова (''Своб.индексиров.''): chlorophyll--pigment--article--biosynthesis--chemistry--light--metabolism--plant leaf--plant physiology--radiation exposure--spectrofluorometry--temperature--thermodynamics--time--chlorophyll--light--pigments, biological--plant leaves--plant physiology--spectrometry, fluorescence--temperature--thermodynamics--time factors
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11.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Volova T., Baranovsky S., Petrovskaya O., Shumilova A., Sukovatyi A.
Заглавие : Biological effects of the free and embedded metribuzin and tribenuron-methyl herbicides on various cultivated weed species
Место публикации : J. Environ. Sci. Health Part B Pestic. Food Contamin. Agric. Wastes: Taylor and Francis Inc., 2020. - Article in press. - ISSN 03601234 (ISSN), DOI 10.1080/03601234.2020.1807835
Аннотация: The present study addresses the herbicidal activity and biological effects of the metribuzin (MET) and tribenuron-methyl (TBM) herbicides used to control various weed species (Amaranthus retroflexus, Sinapis arvensis, and Leucanthemum maximum). The effects of the free herbicides and the herbicides embedded in granules of degradable polymer poly-3-hydroxybutyrate [P(3HB)] blended with birch wood flour were compared. Metribuzin, regardless of the form, caused 100% mortality of the three weeds by day 21. The herbicidal activity of tribenuron-methyl was lower than that of metribuzin, but the embedded TBM was superior to the free herbicide in the length and strength of its action on the weeds. Both metribuzin forms dramatically decreased the main parameters of fluorescence: maximum quantum yield of photosystem-II [Y(II)max], maximum quantum yield of non-photochemical quenching [Y(NPQ)max], and maximum rate of non-cyclic electron transport [ETRmax] and concentrations of chlorophyll a and b. The effect of the embedded TBM on the photosynthetic activity of the weeds was lower in the first two weeks of the growth of herbicide-treated plants but lasted longer than the effect of the free TBM and increased over time. Embedding of metribuzin in the matrix of degradable blend did not decrease its herbicidal activity. © 2020 Taylor & Francis Group, LLC.
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12.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Volova, Tatiana, Baranovsky, Sergey, Petrovskaya, Olga, Shumilova, Anna, Sukovatyi, Alexey
Заглавие : Biological effects of the free and embedded metribuzin and tribenuron-methyl herbicides on various cultivated weed species
Колич.характеристики :11 с
Коллективы : Project "Agropreparations of the new generation: a strategy of construction and realization" [074-02-2018-328]; Government of the Russian Federation of April 9, 2010, "On measures designed to attract leading scientists to the Russian institutions of higher learning" [220]
Место публикации : J. Environ. Sci. Health Part B-Pestic. Contam. Agric. Wastes: TAYLOR & FRANCIS INC, 2020. - ISSN 0360-1234, DOI 10.1080/03601234.2020.1807835. - ISSN 1532-4109(eISSN)
Примечания : Cited References:42. - This work was supported by Project "Agropreparations of the new generation: a strategy of construction and realization" [Agreement No 074-02-2018-328] in accordance with Resolution No 220 of the Government of the Russian Federation of April 9, 2010, "On measures designed to attract leading scientists to the Russian institutions of higher learning".
Предметные рубрики: SYNTHASE-INHIBITING HERBICIDES
CHLOROPHYLL FLUORESCENCE
RELEASE
Аннотация: The present study addresses the herbicidal activity and biological effects of the metribuzin (MET) and tribenuron-methyl (TBM) herbicides used to control various weed species (Amaranthus retroflexus, Sinapis arvensis,andLeucanthemum maximum). The effects of the free herbicides and the herbicides embedded in granules of degradable polymer poly-3-hydroxybutyrate [P(3HB)] blended with birch wood flour were compared. Metribuzin, regardless of the form, caused 100% mortality of the three weeds by day 21. The herbicidal activity of tribenuron-methyl was lower than that of metribuzin, but the embedded TBM was superior to the free herbicide in the length and strength of its action on the weeds. Both metribuzin forms dramatically decreased the main parameters of fluorescence: maximum quantum yield of photosystem-II [Y(II)(max)], maximum quantum yield of non-photochemical quenching [Y(NPQ)(max)], and maximum rate of non-cyclic electron transport [ETRmax] and concentrations of chlorophyllaandb. The effect of the embedded TBM on the photosynthetic activity of the weeds was lower in the first two weeks of the growth of herbicide-treated plants but lasted longer than the effect of the free TBM and increased over time. Embedding of metribuzin in the matrix of degradable blend did not decrease its herbicidal activity.
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13.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Rogozin D.Y., Zykov V.V., Kalugin I.A., Daryin A.V., Degermendzhy A.G.
Заглавие : Carotenoids of phototrophic organisms in bottom sediments of meromictic Lake Shira (Siberia, Russia) as an indicator of past stratification
Место публикации : Doklady Biological Sciences. - 2011. - Vol. 439, Is. 1. - С. 228-231. - ISSN 00124966 (ISSN) , DOI 10.1134/S0012496611040077
Ключевые слова (''Своб.индексиров.''): 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
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14.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Zavorueva E.N., Ushakova S.A.
Заглавие : Characteristics of slow induction curve of chlorophyll fluorescence and CO2 exchange for the assessment of plant heat tolerance at various levels of light intensity
Колич.характеристики :8 с
Место публикации : Russ. J. Plant Physiol.: MAIK NAUKA/INTERPERIODICA/SPRINGER, 2004. - Vol. 51, Is. 3. - P294-301. - ISSN 1021-4437, DOI 10.1023/B:RUPP.0000028674.39572.1c
Примечания : Cited References: 18
Ключевые слова (''Своб.индексиров.''): triticum aestivum--raphanus sativus var. minor--fluorescence--heat tolerance--pigments--co2 exchange
Аннотация: The heat tolerance of wheat (Triticum aestivum L.) and radish (Raphanus sativus L. var. minor) cenoses exposed to elevated and damaging air temperatures (35 degreesC for 20 h, 45 degreesC for 7 h) under photoculture conditions at various levels of photosynthetically active radiation (PAR) was assessed by measuring characteristics of the slow induction curve of chlorophyll fluorescence at 682 and 734 nm and the CO2 exchange rate. Irrespective of the illumination level, the exposure of the cenoses to 35 degreesC did not induce irreversible changes in the plant photosynthetic apparatus. The lowest extent of damage to wheat and radish cenoses exposed to 45 degreesC was observed at 150 W/m(2) of PAR, whereas the highest damage of the plants was observed at an illumination level that was close to the compensation point of the cenose photosynthesis (50-70 W/m(2) of PAR at air temperature of 24 degreesC). Viability index proved to be the most sensitive. characteristic, compared to other characteristics, which were determined by measuring the slow phase of fluorescence induction at 682 and 734 nm. In the cenoses studied, the pattern of changes in the viability index in response to a stress factor was close to the changes in the photosynthetic rate.
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15.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Zavoruev V.V., Levin L.A.
Заглавие : Chlorophyll distribution in the fresh water reservoir and under ice
Колич.характеристики :3 с
Место публикации : Dokl. Akad. Nauk: MEZHDUNARODNAYA KNIGA, 1996. - Vol. 348, Is. 3. - P419-421. - ISSN 0869-5652
Примечания : Cited References: 7
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16.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Nesterenko, T. V., Shikhov, V. N., Tikhomirov, A. A.
Заглавие : Chlorophyll fluorescence as an indicator of age-dependent changes in photosynthetic apparatus of wheat leaves
Колич.характеристики :7 с
Коллективы : section VI of the Program for Basic Research of the State Academies of Sciences [56.1.4]
Место публикации : Russ. J. Plant Physiol.: MAIK NAUKA/INTERPERIODICA/SPRINGER, 2015. - Vol. 62, Is. 3. - С. 307-313. - ISSN 1021-4437, DOI 10.1134/S1021443715020144. - ISSN 1608-3407(eISSN)
Примечания : Cited References:30. - This work was supported by the State Assignment, topic no. 56.1.4, section VI of the Program for Basic Research of the State Academies of Sciences for 2013-2020.
Предметные рубрики: LEAF SENESCENCE
ONTOGENIC APPROACH
LIGHT DEPENDENCE
PARAMETERS
Ключевые слова (''Своб.индексиров.''): triticum sativus--chlorophyll fluorescence parameters--actinic light--intensity--leaf ontogeny
Аннотация: Wheat (Triticum sativus L.) seedlings of various ages (2- to 16-day-old plants) were used to study age-dependent changes in the chlorophyll fluorescence induction (CFI) at various light intensities during flu- orescence measurements. Plants were raised in a growth chamber using hydroponics with expanded clay, controlled environmental conditions, and 690 A mu mol/(m(2) s) photon flux density (PFD) of photosynthetically active radiation (PAR). Parameters of CFI were determined under actinic PFD of 380, 580, 820, and 1340 A mu mol/(m(2) s) PAR. The fifth leaf from the stem base, exposed to uniform lighting, was sampled for measurements. This leaf emerged at the plant age of 16 days. Based on fluorescence data, we calculated the maximal photochemical quantum yield of photosystem II (F (v)/F (m)), the effective photochemical quantum yield of PSII (Yield), parameters of photochemical (qP) and non-photochemical (qN and NPQ) quenching of chlorophyll fluorescence, the F (p)/F (t) ratio, and the "vitality index" (fluorescence decrease ratio, R (fd)). At moderate actinic PFD, applied commonly in PAM fluorometers (about 380 A mu mol/(m(2) s)), age-dependent changes in NPQ, F (p)/F (t), and R (fd) were observed. Analysis of CFI parameters in wheat leaves of different ages at PFD increasing from 380 to 820 A mu mol/(m(2) s) revealed that R (fd), NPQ, and qN are the most sensitive markers of the leaf age among all parameters tested. These suitable indicators can be used for rapid assessment of the leaf age.
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17.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Nesterenko T.V., Tikhomirov A.A., Shikhov V.N.
Заглавие : Chlorophyll fluorescence induction and estimation of plant resistance to stress factors
Место публикации : Zhurnal Obshchei Biologii. - 2007. - Vol. 68, Is. 6. - С. 444-458. - ISSN 00444596 (ISSN)
Ключевые слова (''Своб.индексиров.''): chlorophyll--adaptation--cucumber--fluorescence--growth, development and aging--metabolism--physiology--plant leaf--review--adaptation, physiological--chlorophyll--cucumis sativus--fluorescence--plant leaves--cucumis sativus
Аннотация: The usage of chlorophyll fluorescence induction (CFI) for estimating various types of plant resistance (primary, general, initial, adaptive) to stress factors is reviewed. The necessity of ontogenetic approach (considering the age-specific properties of the photosynthetic apparatus) in determining general and adaptive resistance of plants to prolonged action of stress factors by the CFI method is argued. In the plant Cucumbis sativus L., the possibility is shown of using age-specific qualitative and quantitative traits of leaf CFI (changes in the shape of chlorophyll fluorescence induction curves and in the dynamics of CFI parameters in the course of leaf ontogeny) for comparative study of differences between fully active and stressed plants. Possible criteria are suggested for estimating the effect of outer stress factors by the presence or absence of a steady-state phase in the dynamics of CFI parameters during leaf ontogeny. It is also suggested to use the duration of the steady-state phase following the termination of leaf growth (estimated by the dynamics of the slow phase of CFI as the ratio of fluorescence intensity at the peak P and the steady-state fluorescence intensity, FP/FS, or as the viability index Rfd) and the variability of CFI parameters during this period as qualitative estimates of plant resistance to prolonged action of stress factors.
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18.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : NESTERENKO T.V., TIKHOMIROV A.A., ZOLOTUKHIN I.G., VOLKOVA E.K.
Заглавие : CHLOROPHYLL INDUCTION FLUORESCENCE AND CERTAIN CHARACTERISTICS OF CUCUMBER LEAVES GROWN UNDER ACTION OF LIGHT OF VARIOUS SPECTRAL CONTENT AND INTENSITIES
Колич.характеристики :6 с
Место публикации : FIZIOLOGIYA I BIOKHIMIYA KULTURNYKH RASTENII: INST PLANT PHYSIOL GENETICS, 1985. - Vol. 17, Is. 1. - P11-16. - ISSN 0256-1425
Примечания : Cited References: 15
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19.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Kolmakov V.I., Levin L.A., Dubovskaia O.P., Gladyshev M.I.
Заглавие : Circadian rhythms of feeding with microalgae of Ceriodaphnia quadrangula in laboratory culture
Место публикации : Biofizika. - 2002. - Vol. 47, Is. 4. - С. 673-676. - ISSN 00063029 (ISSN)
Ключевые слова (''Своб.индексиров.''): chlorophyll--alga--animal--article--chemistry--circadian rhythm--crustacea--fluorometry--growth, development and aging--photoperiodicity--physiology--algae--animals--chlorophyll--circadian rhythm--crustacea--fluorometry--photoperiod
Аннотация: The circadian rhythm of grazing of microalgae by a laboratory culture of Ceriodaphnia quadrangula under continuous illumination was studied by continuous registration of chlorophyll fluorescence at the outlet of a flow-through cultivator. A culture of green alga Chlorella vulgaris was used as a feed. The data obtained were treated by the statistical spectral analysis. It was found that animals preliminarily grown under a 12 h light: 12 h dark regime and transferred to constant light showed two maxima in the circadian rhythm of grazing with periods of 0.7 and 1.1 h. Animals preliminarily grown under constant light showed no circadian rhythm of grazing. It was concluded that the circadian rhythm of grazing of C. quadrangula has endogenous nature and can change according to light conditions.
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20.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Kolmakov V.I., Gaevskii N.A., Ivanova E.A., Dubovskaya O.P., Gribovskaya I.V., Kravchuk E.S.
Заглавие : Comparative analysis of ecophysiological characteristics of Stephanodiscus hantzschii Grun. in the periods of its bloom in recreational water bodies
Колич.характеристики :7 с
Место публикации : Russ. J. Ecol.: MAIK NAUKA/INTERPERIODICA, 2002. - Vol. 33, Is. 2. - P97-103. - ISSN 1067-4136, DOI 10.1023/A:1014448707663
Примечания : Cited References: 31
Предметные рубрики: RESOURCE
Ключевые слова (''Своб.индексиров.''): stephanodiscus hantzschii grun.--chlorophyll a--efficiency in using photosynthetically active radiation
Аннотация: In the periods of summer and autumn bloom of the Stephanodiscus hantzschii Crun. in recreational water bodies, studies on the vertical distribution of chlorophyll a, its contents per unit biomass, efficiency in using photosynthetically active radiation (E-PhAR), and assimilative activity of microalgae were performed. The results confirmed the existence of two ecophysiological forms of St. hantzschii and provided evidence that both forms are typically autotrophic and can efficiently use low-intensity PhAR for photosynthesis.
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