Wyniki wyszukiwania

1

The content of photosynthetic pigments and the light condition in the fruit and leaves of sweet pepper

100%

Pilarski J., Kocurek M.

Polish Journal of Natural Sciences. Supplement

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2003

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tom 01

2

Artykuł dostępny w postaci pełnego tekstu - kliknij by otworzyć plik

Effect of the iron chelate FeEDDHA on Staphylea pinnata shoot multiplication and photosynthetic pigment concentration

86%

Szewczyk-Taranek B., Pawlowska B., Prokopiuk B., Moczulska K.

BioTechnologia. Journal of Biotechnology Computational Biology and Bionanotechnology

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2015

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tom 96

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nr 1

3

Light-triggered protochlorophyllide to chlorophyllide reduction – new insights into enzyme-substrate interactions

86%

Gabruk M., Kruk J., Mysliwa-Kurdziel B.

BioTechnologia. Journal of Biotechnology Computational Biology and Bionanotechnology

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2013

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tom 94

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nr 3

4

The influence of cadmium on photosynthetic pigment in maize

86%

Jasiewicz C., Zemanek M., Antonkiewicz J.

Polish Journal of Natural Sciences. Supplement

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2003

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tom 01

5

Modelling the influence of acclimation on the absorption properties of marine phytoplankton

86%

Wozniak B., Dera J., Ficek D., Majchrowski R., Kaczmarek S., Ostrowska M., Koblentz-Mishke O. I.

Oceanologia

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1999

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tom 41

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nr 2

6

Light absorption by phytoplankton in the Southern Baltic and Pomeranian lakes: mathematical expressions for remote sensing applications

72%

Meler J., Ostrowska M., Ficek D., Zdun A.

Oceanologia

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2017

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tom 59

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nr 3

The absorption properties of phytoplankton in surface waters of the Baltic Sea and coastal lakes are examined in the context of their relationships with the concentration of the main photosynthetic pigment, chlorophyll a. The analysis covers 425 sets of spectra of light absorption coefficients aph(l) and chlorophyll a concentrations Chla measured in 2006—2009 in various waters of the Baltic Sea (open and coastal waters, the Gulf of Gdańsk and the Pomeranian Bay, river mouths and the Szczecin Lagoon), as well as in three lakes in Pomerania, Poland (Obłęskie, Łebsko and Chotkowskie). In these waters the specific (i.e. normalized with respect to Chla) light absorption coefficient of phytoplankton aph *(l) varies over wide ranges, which differ according to wavelength. For example, aph *(440) takes values from 0.014 to 0.124 mg1 m2, but aph *(675) from 0.008 to 0.067 mg1 m2, whereby Chla ranges from 0.8 to 120 mg m3. From this analysis a mathematical description has been produced of the specific light absorption coefficient of phytoplankton aph *(l), based on which the dynamics of its variability in these waters and the absorption spectra in the 400—700 nm interval can be reconstructed with a low level of uncertainty (arithmetic statistical error: 4.09—10.21%, systematic error: 29.63—51.37%). The relationships derived here are applicable in local remote sensing algorithms used for monitoring the Baltic Sea and coastal lakes and can substantially improve the accuracy of the remotely determined optical and biogeochemical characteristics of these waters.

7

Evaluation of some bean lines tolerance to alkaline soil

72%

Radi A. A., Abdel-Wahab D. A., Hamada A. M.

Journal of Biology and Earth Sciences

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2012

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tom 02

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nr 1

8

The effect of temperature on growth of Thalassiosira pseudonana in vitro system

72%

Bojko M., Wanda P., Latowski D., Kuczynska P., Olchawa-Pajor M., Strzalka K.

BioTechnologia. Journal of Biotechnology Computational Biology and Bionanotechnology

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2013

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tom 94

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nr 3

9

Alleviation of nickel toxicity in wheat (Triticum aestivum L.) seedlings by selenium supplementation

72%

Gajewska E., Drobik D., Wielanek M., Sekulska-Nalewajko J., Goclawski J., Mazur J., Sklodowska M.

Biological Letters

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2013

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tom 50

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nr 2

10

Effects of solar radiation on motility, photomovements and pigmentation in two strains of the cyanobacterium, Phormidium uncinatum

72%

Hader D.-P., Hader M.

Acta Protozoologica

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1990

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tom 29

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nr 4

11

The response of lettuce to fluorescent light and led light relative to different nitrogen nutrition of plants

72%

Borowski E., Hawrylak-Nowak B., Michalek S.

Acta Scientiarum Polonorum. Hortorum Cultus

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2014

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tom 13

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nr 5

In two successive pot experiments with lettuce cv. ‘Królowa Majowych’, conducted in a phytotron, this study investigated the effect of cool white fluorescent light (FRS) at a PPFD 200 ȝmol·m-2·s -1 and red-blue LED light at a PPFD of 200 and 800 ȝmol·m-2·s -1 on photosynthesis, yield, leaf area, SLA, and the content of photosynthetic pigments, total N and nitrates. Experimental plants were grown in sphagnum peat supplemented with full-strength Hoagland’s solution at the beginning of the experiment. 10 days after plants were pricked out, 4 experimental series were made which differed in the form of N supplied to the growing medium at a rate of 420 mg (2N): 1) Hoagland’s solution (control); 2) Hoagl + 2N-NO3; 3) Hoagl + 2N-NH4; 4) Hoagl + 2N-NH4/NO3. The obtained results showed that the lettuce leaf yield under FRS light was distinctly higher than under LED light at a PPFD of 200, and in particular at 800 ȝmol·m-2·s -1. Besides, the leaves grown under FRS light showed a significantly thinner leaf blade (SLA) and a lower content of photosynthetic pigments, total N and nitrates. The photosynthetic rate was higher under LED light relative to FRS light. Different nutrition of plants with N-NO3, N-NH4 and N-NH4/NO3 had a similar effect on the yield and analysed traits of lettuce leaves, regardless of the type of light and the level of irradiation with LED light. LED lamps seem to be a very promising light source for plants, but they require further research on how to adapt the spectral distribution of light to their requirements.

12

Effects of different hormonal treatments on growth parameters and secondary metabolite production in organ culture of Hyssopus officinalis L.

72%

Shoja H. M., Shishavan H. K.

BioTechnologia. Journal of Biotechnology Computational Biology and Bionanotechnology

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2021

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tom 102

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nr 1

13

Antioxidant defence system in the leaves and roots of A. thaliana under long-term S deficiency

72%

Ostaszewska M., Juszczuk I. M.

BioTechnologia. Journal of Biotechnology Computational Biology and Bionanotechnology

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2013

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tom 94

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nr 3

14

The effect of 2-benzoxazolinone on test plants

72%

Demczuk A., Sacala E., Grzys E.

Acta Physiologiae Plantarum

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2007

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tom 29

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nr 1 Suppl.

15

Composition and resources of photosynthetic pigments of the sea phytoplankton

72%

Wozniak B., Ostrowska M.

Oceanologia

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1990

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tom 29

16

Wpływ stymulacji nasion Scorzonera hispanica L. światłem lasera na zawartość barwników fotosyntetycznych w liściach

72%

Acta Agrophysica

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2017

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tom 24

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nr 3

Przedstawione wyniki badań dotyczyły efektów stymulacji nasion światłem lasera He-Ne na zawartość barwników fotosyntetycznych w liściach skorzonery odmiany ‘Maxima’. Sprawdzono również, czy naświetlanie nasion może wpływać na długość czasu życia fluorescencji chlorofilu a w liściach i w ekstrakcie z liści. Materiał badawczy stanowiły liście roślin wyrosłych z nasion zebranych w latach 2009, 2010, 2011, 2012. Zdolność kiełkowania tych nasion wynosiła odpowiednio 50,8; 71,0; 93,0; 79,3%. Przed siewem nasiona poddano stymulacji elektromagnetycznej światłem lasera He-Ne o długości fali 632,8 nm i powierzchniowej gęstości mocy 3 mw∙cm–2 – w czasie 1, 5, 10 i 30 minut. Nasiona niestymulowane traktowano jako kontrolę. Zawartość chlorofilu a i b oraz karotenoidów w liściach skorzonery była większa w roślinach wyrosłych z nasion młodszych (zebranych w latach 2011 i 2012) niż z nasion starszych (zebranych w latach 2009 i 2010). Stymulacja nasion młodszych światłem lasera wpłynęła na zmniejszenie zawartości tych barwników w liściach. Czas życia fluorescencji chlorofilu w ekstrakcie z liści był dłuższy niż w liściach. Nie stwierdzono istotnego wpływu stymulacji laserowej nasion na czas życia fluorescencji chlorofilu w ekstrakcie z liści skorzonery. Parametr ten był wyższy w ekstrakcie liści roślin wyrosłych z nasion młodszych (ze zbioru w latach 2011, 2012) niż starszych (ze zbioru w latach 2009, 2010).

17

Luminescence and photosynthesis of marine phytoplankton - a brief presentation of new results

72%

Wozniak B., Dera J.

Oceanologia

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2000

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tom 42

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nr 2

This volume contains a set of eight papers presenting the results of the latest research into the interaction of light with marine phytoplankton by teams from the Marine Physics Department at the IO PAS in Sopot, and the Department of Environmental Physics at the Pedagogical University of Słupsk. These results were presented at the ‘Second Workshop on Luminescence and Photosynthesis of Marine Phytoplankton’ (Sopot–Paraszyno, 11–15 October 1999) sponsored by the Polish State Committee for Scientific Research. This introductory article discusses the most important assumptions and objectives of the research, and outlines the latest results. These are subsequently discussed in detail in the following papers: (1) Majchrowski & Ostrowska, Influence of photo- and chromatic acclimation on pigment composition in the sea, (2) Woźniak et al., Model of the ‘in vivo’ spectral absorption of algal pigments. Part 1. Mathematical apparatus, (3) Majchrowski et al., Model of the ‘in vivo’ spectral absorption of algal pigments. Part 2. Practical applications of the model, (4)Ostrowska et al., Variability of the specific fluorescence of chlorophyll in the ocean. Part 1. Theory of classical ‘in situ’ chlorophyll fluorometry, (5) Ostrowska et al., Variability of the specific fluorescence of chlorophyll in the ocean. Part 2. Fluorometric method of chlorophyll a determination, (6) Ficek et al., Influence of non-photosynthetic pigments on the measured quantum yield of photosynthesis, (7) Ficek et al., Variability of the portion of functional PS2 reaction centres in the light of a fluorometric study. For the reader’s convenience, we append a list of the symbols denoting the physical quantities used in the texts. The nomenclature and denotations are in line with the conventions employed in the subject literature.

18

Activity of salicylic acid on the growth and biochemism of Chlorella vulgaris Beijerinck

72%

Czerpak R., Bajguz A., Gromek M., Kozlowska G., Nowak I.

Acta Physiologiae Plantarum

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2002

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tom 24

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nr 1

19

Jasmonic acid affects changes in the growth and some components content in alga Chlorella vulgaris

72%

Czerpak R., Piotrowska A., Szulecka K.

Acta Physiologiae Plantarum

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2006

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tom 28

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nr 3

The present study was undertaken to test the influence of exogenous applied jasmonic acid upon the growth and changes in some metabo-ites levels in the cells of green alga Chlorella vulgaris Beijerinck (Chlorophyceae). It was found, that JA in algal cells acted in a concentration-dependent manner. Treatment with JA at high concentrations range of 10⁻⁵-10⁻⁴ M, resulted in the decrease in cell number and reduction of major photosynthetic pigments, monosaccharides, soluble cellular and extracellular proteins levels as well as decrease in pH of the medium. In contrast to 10⁻⁵ and 10⁻⁴ M JA, this phytohormone applied at 10⁻⁸-10⁻⁶ M induced the increase in cell number, photosynthetic pigments and monosaccharides contents, significant accumulation and extracellular secretion of soluble proteins over control and neutralization of the medium. Quantitative changes in polypeptide pattern of total cellular proteins after treatment with the optimal concentration of 10⁻⁷ M JA on the 7th day of cultivation as analyzed by SDS-PAGE, was also observed. JA induced synthesis de novo of15 specific polypeptides with molecular weight 334-16 kDa which weren’t detected in the control. The data suggest that JA plays a important role in algal growth and development.

20

Influence of UV-B radiation [UVB] on the growth and nodularin [NOD] production in Nodularia spumigena cultures [NSG 0897]

72%

Forycka K., Surosz W.

Oceanological and Hydrobiological Studies

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2005

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tom 34

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nr Suppl.3

Ograniczanie wyników

The content of photosynthetic pigments and the light condition in the fruit and leaves of sweet pepper

Effect of the iron chelate FeEDDHA on Staphylea pinnata shoot multiplication and photosynthetic pigment concentration

Light-triggered protochlorophyllide to chlorophyllide reduction – new insights into enzyme-substrate interactions

The influence of cadmium on photosynthetic pigment in maize

Modelling the influence of acclimation on the absorption properties of marine phytoplankton

Light absorption by phytoplankton in the Southern Baltic and Pomeranian lakes: mathematical expressions for remote sensing applications