Wyniki wyszukiwania - AGRO

1

Effects of ultraviolet-B radiation in the CO2 fixation, photosystem II activity and spectroscopic properties of the wild and mutant Anacystis cells

100%

Nedunchezhian N., Kulandaivelu G.

Acta Physiologiae Plantarum

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1996

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tom 18

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nr 1

2

Changes in phytoplankton pigments composition during 2000 in different Southern Baltic Regions

100%

Ston J., Kosakowska A.

Oceanological Studies

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2002

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tom 31

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nr 1-2

3

Changes in nutrient concentrations in upwelling border areas at north-west coast of Africa

100%

Juchnowicz-Bierbasz M.

Polskie Archiwum Hydrobiologii

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1999

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tom 46

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nr 1

4

Chlorophyll fluorescence of cucumber fruits Aramis F1 as affected by storage conditions

100%

Kosson R.

Vegetable Crops Research Bulletin

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2001

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tom 54

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nr 1

5

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Tocopherol content in edible plant oils

86%

Gliszczynska-Swiglo A., Sikorska E., Khmelinskii I., Sikorski M.

Polish Journal of Food and Nutrition Sciences

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2007

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tom 57

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nr 4[A]

157-161

Edible vegetable oils were analysed for tocopherols by reversed-phase HPLC. These included refined corn, soybean, sunflower, rapeseed, grapeseed, and peanut oils, and cold-pressed extra-virgin olive, linseed, rapeseed, and sunflower oils. Total measured tocopherol concentrations varied in the range from 121 to 829 mg/kg. The contents of individual α-, (β+γ)-, and δ-tocopherols show a great diversity depending on the kind of oil. Moreover, the effect of photooxidation on the tocopherol content was studied in cold-pressed sunflower and rapeseed oils. These studies revealed only a minor decomposition of tocopherols under visible light.

6

Magnetized phosphorus solution and mycorrhization with Diversispora versiformis affect P use efficiency, growth and photosynthetic parameters in sweet basil (Ocimum basilicum)

86%

Shabani E., Bolandnazar S., Tabatabaei S. J.

Journal of Horticultural Research

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2019

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tom 27

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nr 2

7

Effect of pre-harvest application of gibberellic acid on the contents of pigments in cut leaves of Asarum europaeum L.

86%

Pogroszewska E., Joniec M., Rubinowska K., Najda A.

Acta Agrobotanica

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2014

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tom 67

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nr 2

The experiment determined the effect of gibberellic acid applied prior to harvest on the contents of plant pigments in cut leaves of wild ginger (Asarum europaeum L.), cultivated in an unheated plastic tunnel and in the field. Foliar application of GA3 at a concentration of 100, 200, 400, 600 mg x dm-3 was repeated four times every two weeks. It has been proven that pre-harvest spraying of plants with gibberellic acid at a concentration of 100 mg x dm-3 has a positive effect on the content of photosynthetically active pigments in the leaves of A. europaeum cultivated in an unheated plastic tunnel. Application of GA3 at a concentration of 600 mg x dm-3 led to the accumulation of the greatest amount of anthocyanins in the leaves of Asarum europaeum cultivated both in the unheated plastic tunnel and in the field. The response of plants to GA3 application, expressed in the amount of flavonoids, depended on conditions related to the cultivation site. Pre-harvest treatment of A. europaeum plants with gibberellic acid at concentrations of 100-600 mg x dm-3 reduced the production of flavonoids in tunnel-grown wild ginger, but enhanced their accumulation in plants cultivated in the field. Pre-harvest application of gibberellic acid did not affect the fresh weight or dry mass content in plant material.

8

Regional algorithms for the estimation of chlorophyll and suspended matter concentration in the Gulf of Finland from MODIS-Aqua satellite data

86%

Vazyulya S., Khrapko A., Kopelevich O., Burenkov V., Eremina T., Isaev A.

Oceanologia

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2014

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tom 56

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nr 4

9

Influence of selected abiotic factors on the decomposition of chlorophylls

86%

Kowalewska G., Szymczak M.

Oceanologia

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2001

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tom 43

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nr 3

315-328

The paper presents the results of experiments to determine the influence of selected physico-chemical factors – oxygen, visible light and temperature – on the decomposition of (1) chlorophylls a, b and c, chlorophyll a derivatives and β-carotene in acetone solution, and (2) chlorophyll a and β-carotene in axenic cultures of the blue-green algae Anabaena variabilis. The results indicate that both in acetone extracts and in blue-green algae cultures these pigments were most sensitive to light and oxygen; temperatures of up to 25◦C had no marked influence on these compounds. Under anoxia in acetone solution, the stability towards light decreased in the order chlorophyll a, chlorophyll b, chlorophylls c. Chlorophyll a, moreover, was less stable than its derivatives – phaeophorbides, phaeophytins, pyrophaeophytins and steryl chlorins – but more stable than β-carotene, in the last case also in the blue-green algae cultures. Decomposition of all the pigments proceeded mainly via the breakdown of the porphyrin macrocycle, since the decomposition products were not detected in the VIS range. On the basis of these experiments one can state that while light and oxygen may have a decisive direct influence on the distribution of chlorophylls and β-carotene in sediments, in the natural environment, temperatures of up to 25◦ C may have very little immediate effect.

10

Structure-dependent phytotoxicity of new aminophosphonates

86%

Bielecki K., Dziamska A., Sarapuk J.

Zeszyty Problemowe Postępów Nauk Rolniczych

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2002

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tom 481

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nr 1

Electrolyte efflux, chlorophyll, malondialdehyde content and enzymatic activities (catalase, peroxidase) in cucumber cotyledons as well as stability of model lipid membranes in the presence of some new, acyclic and cyclic, aminophosphonates were studied. They also differed in the substituents at the phosphorus and nitrogen atoms. It was found that the effectiveness of the compounds to influence mentioned parameters depended on their lipophilicity and structural features. The most active compounds were these with isopropyl substituents at the P atom unless their hydrocarbon chains at the N atom were not too long. Butyl substituents at phosphorus significantly decreased aminophosphonates efficiency. Similar effect was observed when trans-type hydrocarbon chain was replaced with a short-branched one. It also seems that cyclic compounds with hexane rings were weaker modifiers of model and biological membranes than these with pentane rings. Results show that aminophosphonates interact with plasma membranes and presumably induce oxidative stress.

11

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

|

nr 3

12

Average nutrient and chlorophyll distributions in the Western Mediterranean: RADMED project

86%

Garcia-Martinez M. C., Vargaz-Yanez M., Moya F., Santiago R., Munoz M., Reul A., Ramirez T., Balbin R.

Oceanologia

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2019

|

tom 61

|

nr 1

13

Identification and characteristic Pharbitis nil cDNA encoding protein of binding chlorophyll

86%

Dabrowska G., Jagielska J., Wrotek S., Tretyn A.

Polish Journal of Natural Sciences. Supplement

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2003

|

tom 01

14

Iron nutrition and the response of bean seedlings photosynthetic apparatus to light

86%

Krupa Z., Strycharczuk E.

Biological Bulletin of Poznań. Supplement

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1996

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tom 33

15

Protectional excitation quenching in the photosynthetic antenna complexes

86%

Gruszecki W. I., Grudzinski W., Niedzwiedzki D., Krupa Z.

Polish Journal of Natural Sciences. Supplement

|

2003

|

tom 01

16

Phosphate-dependent oxidative stress in Chlorella vulgaris

86%

Kozlowska-Szerenos B., Borowska A., Maleszewski S.

Polish Journal of Natural Sciences. Supplement

|

2003

|

tom 01

17

Why there are photodamages to photosystem II at low light intensities

86%

Sielewiesiuk J.

Acta Physiologiae Plantarum

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2002

|

tom 24

|

nr 4

18

Chlorophyll - nutrients - Secchi disc relationships in the Great Mazurian Lakes [North-Eastern Poland]

86%

Kufel L.

Polish Journal of Ecology

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1998

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tom 46

|

nr 3

19

Resistance of chlorophylls and carotenoids against photobleaching at different phases of chloroplast biogenesis

86%

Wieckowski S., Waloszek A.

Acta Physiologiae Plantarum

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1995

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tom 17

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nr 2

20

Do heavy metals induce significant changes in spectral characteristics of chlorophylls in terrestial higher plants? The effects of Cd, Cu, Ni, and Zn on rye seedlings

86%

Krupa Z., Krupa M., Gruszecki W. I.

Polish Journal of Natural Sciences. Supplement

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2003

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tom 01

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