Temat: chlorophyll - Prolib Integro

Skocz do pozycji: 1.

Tytuł:: Influence of alcoholic extracts from Helianthus annnus L. roots on the photosynthetic activity of Sinapis alba L. cv. Barka plants
Autorzy:: Puła, Joanna
Barabasz-Krasny, Beata
Zandi, Peiman
Stachurska-Swakoń, Alina
Możdżeń, Katarzyna
Wang, Yaosheng
Dostawca treści:: Repozytorium Uniwersytetu Jagiellońskiego

Artykuł

na półce

Skocz do pozycji: 2.

Tytuł:: Impact of ultraviolet-B radiation on two species of forest dwarf shrubs: bilberry (Vaccinium myrtillus L.) and cowberry (Vaccinium vitis-idaea L.)
Impact of ultraviolet-B radiation on dwarf shrubs
Autorzy:: Robakowski, Piotr
Współwytwórcy:: Polish Academy of Sciences. Institute of Ecology
Wydawca:: Polish Academy of Sciences. Institute of Ecology. Publishing Office
Powiązania:: Johanson U., Gehrke C., Bjorn O. L., Callaghan V. T. 1995a - The effects of enhanced UV-B radiation on the growth of dwarf shrubs in subarctic heathland. Functional Ecology, 9: 713-719.
Łukaszek M., Poskuta J. 1996 - Chlorophyll a fluorescence kinetics and CO2 exchange rates in light and in darkness in leaves of tall fescue as affected by UV radiation. Acta Physiologiae Plantarum, 18 (4): 345-350.
Renger G., Volker J. H., Eckert R., Fromme S., Hohm-Veit, Graber P. 1989 - On the mechanism of photosystem II deterioration by UV-B irradiation. Photochemistry and Photobiology, 49 (1): 97-105.
Young R. A., Bjorn O. L., Moan J., Nultsch W. 1993 - Environmental UV Photobiology. Plenum Press, New York, A Division of Plenum Publishing Corporation, 471 pp.
Farman J. C., Gardiner B. O., Shanklin gentlemen. D. 1985 - Large losses of total ozone in Antarctica reveal seasonal ClOx/NOx interaction. Nature, 315: 207-210.
Caldwell M. M., Robberecht R., Nowak R. S., Billings W. D. 1982 - Differential photosynthetic inhibition by ultraviolet radiation in species from the arctic-alpine life zone. Arctic Alpine Res., 14 (3): 195-202.
Johanson U., Gehrke C., Bjorn O. L., Callaghan V. T., Sonesson M. 1995b - The effects of enhanced UV-B radiation on a subarctic heath ecosystem. Ambio, 24 (2): 106-111.
Nogues S., Baker R. N. 1995 - Evaluation of the role of damage to photosystem II in the inhibition of CO2 assimilation in pea leaves on exposure to UV-B radiation. Plant, Cell and Environment, 18: 781-787.
Kerr J. B., McElroy C. T. 1993 - Evidence for large upward trends of ultraviolet-B radiation linked to ozone depletion. Science, 262: 1032-1034.
Blumthaler M., Ambach W. 1990 - Indication of increasing solar ultraviolet-B radiation flux in Alpine regions. Science, 248: 206-208.
Zarzycki K. 1984 - Ekologiczne liczby wskaźnikowe roślin naczyniowych Polski [Indicator values of vascular plants in Poland] - PAN, Instytut Botaniki – [Polish Academy of Sciences, Institute of Botanic], Kraków, 45 pp.
Caldwell M. M., Teramura A. H., Tevini M. 1989 - The changing solar ultraviolet climate and the ecological consequences for higher plants. Tree. 12: 363-367.
Comission of the European Communities 1993 - Environmental UV Radiation. Directorate – General XII for Science. research and development 1993. causes - effects - consequences. edited by J. Acevedo, C. Nolan DG XII / D-1, 3-77 pp.
Inskeep W. P., Bloom P. R. 1985 – Extinction coefficients of chlorophyll a and b in N N-dimethylformamide and 80% acetone. Plant Physiol., 77: 483-485.
Gehrke C., Johanson U., Callaghan V. T., Chadwick D., Robinson H. C. 1995 - The impact of enhanced ultraviolet-B radiation on litter quality and decomposition processes in Vaccinium leaves from the Subarctic. Oikos, 72: 213-222.
Caldwell M. M., Teramura H. A., Tevini M., Bornman F. J., Bjorn O. L., Kulandaivelu G. 1995 - Effects of increased solar ultraviolet radiation on terrestrial plants. Ambio, 24 (3): 166-173.
Ivanzik W., Tevini M., Dohnt G., Voss M., Weiss W., Graber P., Renger G. 1983 - Action of UV-B radiation on photosynthetic primary reaction in spinach chloroplasts. Physiol. Plant., 58: 401-407.
Polish Journal of Ecology
Robberecht R., Caldwell M. M., Billings D. W. 1980 - Leaf ultraviolet optical properties along a latitudinal gradient in the arctic-alpine life zone. Ecology. 61 (3): 612-619.
Cen Y-P., Bornman J. F. 1990 - The Response of Bean Plants to UV-B Radiation Under Different Irradiances of Background Visible Light. J. Exper. Bot., 41 (232): 1489-1495.
Opis:: Bibliographical references (page 13)
Pages 3-13 : illustrations ; 27 cm
Impact of UV-B irradiation on chlorophyll content and chlorophyll fluorescence of two dwarf shrub species: Vaccinium myrtillus L. and Vaccinium vitis-idaea L. was investigated. The plants originating from different latitudes were used. The experiment was carried out in the greenhouse. Three variants of ultraviolet-B irradiation were applied: control = 0, lower dose = 11.32 and higher dose = 22.64 kJ m-2 day-1 UV-BBE (biologically effective dose of UV-B). Measurements of chlorophyll fluorescence and chlorophyll content were carried out. The response of dwarf shrubs to the increased UV-B radiation depended on UV-B dose, species traits and provenance. Vaccinium vitis-idaea was less sensitive to UV-B than Vaccinium myrtillus. The permanent discoloration was observed only on Vaccinium myrtillus leaves. The leaf bud break of this species was accelerated at high UV-B dose compared to the control. The UV-B radiation influenced its photosynthetic apparatus: the chlorophyll content in leaves was reduced, the maximal and the steady state fluorescence of chlorophyll were diminished. The chlorophyll content in leaves of Vaccinium vitis-idaea did not change significantly but the relative vitality index and the steady state fluorescence were modified under the influence of the radiation.
Strony 3-13 : ilustracje ; 27 cm
Bibliografia na stronie 131
Dostawca treści:: RCIN - Repozytorium Cyfrowe Instytutów Naukowych

Książka

na półce

Skocz do pozycji: 3.

Tytuł:: Variability of the specific fluorescence of chlorophyll in the ocean. Part 2. Fluorometric method of chlorophyll a determination
Autorzy:: Ostrowska, M.
Matorin, D.N.
Ficek, D.
Tematy:: variability
luminescence
determination
chlorophyll a
fluorescence
sea
fluorometric method
phytoplankton
ocean
chlorophyll; Pokaż więcej
Wydawca:: Polska Akademia Nauk. Instytut Oceanologii PAN
Powiązania:: https://bibliotekanauki.pl/articles/47939.pdf Link otwiera się w nowym oknie
Opis:: Two methods of determining the chlorophyll a concentration in the sea have been formulated on the basis of artificially induced fluorescence measured with the aid of submersible fluorometers. The method of statistical correlation is founded on the empirical relationship between fluorescence and chlorophyll concentration. The theoretical model of fluorescence described in Part 1 of this paper (see Ostrowska et al. 2000, this volume) provides the basis of the other method, the physical method. This describes the dependence of the specific fluorescence of phytoplankton on the chlorophyll concentration, a diversity of photophysiological properties of phytoplankton and the optical characteristics of the fluorometer. In order to assess their practicability, the methods were subjected to empirical verification. This showed that the physical method yielded chlorophyll concentrations of far greater accuracy. The respective error factors of the estimated chlorophyll concentration were x = 2.07 for the correlation method and x = 1.5 for the physical method. This means that the statistical logarithmic error varies from −52 to +107% in the case of the former method but only from −33 to +51% in the case of the latter. Thus, modifying the methodology has much improved the accuracy of chlorophyll determinations.
Dostawca treści:: Biblioteka Nauki

Artykuł

na półce

Skocz do pozycji: 4.

Tytuł:: ABA SENSITIVITY AS A CRITERION FOR DROUGHT TOLERANCE IN WHEAT (TRITICUM AESTIVUM L.) CULTIVARS
Autorzy:: Razzaq, Abdul
Rashid, Madiha
Shfique, Talal Ahmad
Hafeez, Abdul
Jhanzab, Hafiz Muhammad
Shabir, Ghulam
Shah, Zahid Hussain
Tematy:: ABA
chlorophyll
inhibition
proline; Pokaż więcej
Wydawca:: Instytut Hodowli i Aklimatyzacji Roślin
Powiązania:: https://bibliotekanauki.pl/articles/55928183.pdf Link otwiera się w nowym oknie
Opis:: Criteria used for evaluating drought tolerance of wheat cultivars demanding more time and efforts are usually not efficient and conclusive. Present study was conducted to evaluate ABA sensitivity as a criterion for evaluating drought tolerance of wheat cultivars at an early stage. Ten cultivars of wheat were subjected to drought at 3-leaf stage to select the most sensitive and two tolerant cultivars using mortality rate. Tatara was found the most susceptible whereas GA-2002 and Chakwal-50 were the cultivars with maximum drought tolerance. These cultivars were used to study sensitivity to applied absicic acid (based on germination index and relative growth inhibition rate) and physiological responses (leaf water content, chlorophyll stability index, coefficient of relative inhibition and proline accumulation) under drought stress. Highest ABAsensitivity was recorded in GA-2002 and Chakwal-50 whereas Tatara manifested minimum sensitivity. ABAsensitivity corresponded to physiological indices of drought tolerance. Results show that ABA-sensitivity is an efficient criterion that can be used to evaluate drought tolerance of wheat cultivars at early stage.
Dostawca treści:: Biblioteka Nauki

Artykuł

na półce

Skocz do pozycji: 5.

Tytuł:: Early stages of angiosperm greening studied by in vivo chlorophyll and chlorophyllide fluorescence.
Fluorescencja chlorofilu i chlorofilidu in vivo w badaniach wczesnych etapów zielenienia okrytonasiennych.
Autorzy:: Pałasz, Ewelina
Opis:: Celem pracy była ocena przydatności wybranych metod pomiaru fluorescencji in vivo do badania procesu zielenienia u okrytonasiennych. Jako odniesienie do zarejestrowanych kinetyk fluorescencji chlorofilidu/chlorofilu mierzono widma emisji fluorescencji w temperaturze 77 K.Do doświadczenia używano pięciodniowe liścienie etiolowanej Lepidium sativum. Stosowano trzy schematy zielenienia: schemat I, w którym etiolowane liścienie zaświetlano wysycającym błyskiem światła białego, następnie inkubowano w ciemności; schemat II, liścienie również zaświetlano wysycającym błyskiem światła, a następnie naświetlano ciągłym światłem białym o natężeniu 100-120 µE; schemat III, gdzie szalkę z etiolowaną L. sativum naświetlano tylko światłem ciągłym białym (100-120 µE). W etiolowanym materiale roślinnym stwierdzono obecność dwóch form Pchlidu: fotoaktywnego Pchlidu655 oraz niefotoaktywnego Pchlid632. W wyniku naświetlania Pchlid655 uległ fotoredukcji do Chlidu678, lecz obserwowano jego ponowną akumulację w czasie inkubacji liścieni w ciemności. Dla dłuższych czasów naświetlania obserwowano pojawienia się nowych pasm fluorescencji pochodzących od PSII (przy 680 nm) a następnie od PSI (przy 730 nm).
The objective of this research was to assess selected methods of measurement in vivo fluorescence in order to study greening in angiosperms. Fluorescence emission spectra were measured at 77 K in reference to the registered fluorescence kinetics of Chlorophyllide (and) Chlorophyll.Etiolated five day old seedlings of Lepidium Sativum were used for experiments. Three schemes of greening were used: a scheme I, etiolated seedlings were irradiated by short flash of white light and then incubated in darkness, the scheme II, seedlings were also irradiated by the short flash then irradiated with white light of 100-120 µE, the scheme III, seedlings were irradiated with constant white light of 100-120 µE.Within the etiolated seedlings, two Pchlide spectral forms were observed; the photoactive Pchlide655 and non-photoactive Pchlide630. As a result of illumination, Pchlide655 was transformed to Chlide678. After incubation in the dark, the Reaccumulation of Pchlide655 was observed. After an extensive period of greening, new fluorescence emission spectra originating from PSII (680 nm) and from PSI (730 nm) appeared.For this experiment, the scheme of greening along with the exposure to light influenced the in vivo fluorescence kinetics of Chlorophyllide (and) Chlorophyll. The slow increase of intensity in fluorescence, followed by its decrease was observed in (specify what). Afterwards in (specify what), the rapid initial increase of intensity in fluorescence stayed at a constant level or slowly decreased. This work provides an introduction to the study of in vivo fluorescence in the early stages of angiosperm de-etiolation.
Dostawca treści:: Repozytorium Uniwersytetu Jagiellońskiego

Inne

na półce

Skocz do pozycji: 6.

Tytuł:: Influence of photo- and chromatic acclimation on pigment composition in the sea
Autorzy:: Majchrowski, R.
Ostrowska, M.
Tematy:: marine phytoplankton
underwater irradiance
chlorophyll c
chlorophyll b
chlorophyll a
phytoplankton pigment
photosynthetic pigment
photoacclimation
natural population
sea
ocean
chromatic acclimation; Pokaż więcej
Wydawca:: Polska Akademia Nauk. Instytut Oceanologii PAN
Powiązania:: https://bibliotekanauki.pl/articles/47601.pdf Link otwiera się w nowym oknie
Opis:: The aim of this work was to find statistical relationships between the concentrations of accessory pigments in natural populations of marine phytoplankton and the absolute levels and spectral distributions of underwater irradiance. To this end, empirical data sets from some 600 stations in different parts of the seas and oceans were analysed. These data were obtained from the authors’ own research and from the Internet’s bio-optical data base. They included the vertical distributions of the concentrations of various pigments (identified chromatographically) and the vertical and spectral distributions of the underwater irradiance measured in situ or determined indirectly from bio-optical models. The analysis covered a total of some 4000 points illustrating the dependence of pigment concentration on underwater irradiance characteristics, corresponding to different depths in the sea. The analysis showed that the factor governing the occurrence of photoprotecting carotenoids (PPC) is short-wave radiation λ < 480 nm. A mathematical relationship was established between the relative PPC concentration (relative with respect to the chlorophyll a concentration) and the magnitude of the absorbed radiative energy per unit mass of chlorophyll a from the spectral interval λ < 480 nm, averaged in the water layers Δz = 60 m (or less near the surface) to account for vertical mixing. This absorbed short-wave radiation (λ < 480 nm) was given the name of Potentially Destructive Radiation (PDR∗(z)). Analysis of the relationships between the concentrations of particular photosynthetic pigments (PSP), i.e. chlorophyll b, chlorophyll c, photosynthetic carotenoids (PSC), and the underwater irradiance characteristics indicated that these concentrations were only slightly dependent on the absolute level of irradiance E0(λ), but that they depended strongly on the relative spectral distribution of this irradiance f(λ) = E0(λ)/PAR0. The relevant approximate statistical relationships between the relative concentrations of particular PSP and the function of spectral fitting Fj , averaged in the layer Δz, were derived. Certain statistical relationships between the pigment composition of the phtyoplankton and the irradiance field characteristics are due to the photo- and chromatic acclimation of natural populations of marine phytoplankton. These relationships can be applied in models of the coefficients of light absorption by phytoplankton.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 7.

Tytuł:: Chlorophyll α in the Bransfield Strait and the southern part of Drake Passage during BIOMASS-SIBEX (December 1983-January 1984)
Autorzy:: Lipski, Maciej
Tematy:: chlorophyll α
BIOMASS-SIBEX; Pokaż więcej
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Powiązania:: https://bibliotekanauki.pl/articles/2057345.pdf Link otwiera się w nowym oknie
Dostawca treści:: Biblioteka Nauki

Artykuł

na półce

Skocz do pozycji: 8.

Tytuł:: The Effect of Biostimulants on the Chlorophyll Content and Height of Solanum tuberosum L. Plants
Autorzy:: Mystkowska, Iwona
Tematy:: variety
chlorophyll
potato
variant; Pokaż więcej
Wydawca:: Polskie Towarzystwo Inżynierii Ekologicznej
Powiązania:: https://bibliotekanauki.pl/articles/2173348.pdf Link otwiera się w nowym oknie
Opis:: The effect of foliar feeding with four biostimulants with active substances (Ecklonia maxima algae extract, titanium, humic substances, plant hormones: auxin and cytokinin) on the chlorophyll content and plant height of three Solanum tuberosum cultivars was investigated. A field experiment was carried out in 2015–2017 in eastern Poland in three growing seasons using the split-plot method. The cultivated varieties significantly differentiated the chlorophyll content (SPAD index) and plant height. The research showed the influence of varieties and many years of research on the height of potato plants. The biostimulants increased the value of the SPAD coefficient and the height of the potato plants.
Dostawca treści:: Biblioteka Nauki

Artykuł

na półce

Skocz do pozycji: 9.

Tytuł:: Aba Sensitivity as a Criterion for Drought Tolerance in Wheat (Triticum Aestivum L.) Cultivars
Autorzy:: Razzaq, Abdul
Rashid, Madiha
Shfique, Talal Ahmad
Hafeez, Abdul
Jhanzab, Hafiz Muhammad
Shabir, Ghulam
Shah, Zahid Hussain
Tematy:: ABA
chlorophyll
inhibition
proline; Pokaż więcej
Wydawca:: Instytut Hodowli i Aklimatyzacji Roślin
Powiązania:: https://bibliotekanauki.pl/articles/2199671.pdf Link otwiera się w nowym oknie
Opis:: Criteria used for evaluating drought tolerance of wheat cultivars demanding more time and efforts are usually not efficient and conclusive. Present study was conducted to evaluate ABA sensitivity as a criterion for evaluating drought tolerance of wheat cultivars at an early stage. Ten cultivars of wheat were subjected to drought at 3-leaf stage to select the most sensitive and two tolerant cultivars using mortality rate. Tatara was found the most susceptible whereas GA-2002 and Chakwal-50 were the cultivars with maximum drought tolerance. These cultivars were used to study sensitivity to applied absicic acid (based on germination index and relative growth inhibition rate) and physiological responses (leaf water content, chlorophyll stability index, coefficient of relative inhibition and proline accumulation) under drought stress. Highest ABAsensitivity was recorded in GA-2002 and Chakwal-50 whereas Tatara manifested minimum sensitivity. ABAsensitivity corresponded to physiological indices of drought tolerance. Results show that ABA-sensitivity is an efficient criterion that can be used to evaluate drought tolerance of wheat cultivars at early stage.
Dostawca treści:: Biblioteka Nauki

Artykuł

na półce

Skocz do pozycji: 10.

Tytuł:: Optimising the storage and extraction of chlorophyll samples
Autorzy:: Wasmund, N.
Topp, I.
Schories, D.
Tematy:: freezing
methodology
extraction
chlorophyll a
sea water
alga culture
Baltic Sea
chlorophyll
storage; Pokaż więcej
Wydawca:: Polska Akademia Nauk. Instytut Oceanologii PAN
Powiązania:: https://bibliotekanauki.pl/articles/47427.pdf Link otwiera się w nowym oknie
Opis:: The effect of different methodological steps on the analysis of chlorophyll a (chl a) was tested with algae cultures and Baltic Sea water. Selected experiments were tested with ANOVAs for significant differences between treatments. The results of the experiments led to the following recommendations: the sample volume should be low so that filtration takes no longer than 10 min. Extracts rather than filters should be stored if storage of the samples at −20◦C is required. However, quickfreezing in liquid nitrogen is recommended. The extraction efficiency was much better in 96% ethanol than in 90% acetone – extraction in the latter solvent requires the filters to be homogenised. The extraction time has no significant influence within a range of 3 to 24 hours if the recommended 96% ethanol is used.
Dostawca treści:: Biblioteka Nauki

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