Wyniki wyszukiwania - Biblioteka Nauki

1

Evaluation of antioxidant activity of in vitro propagated medicinal Ceratophyllum demersum L. extracts

100%

Emsen B. , Dogan M.

Acta Scientiarum Polonorum. Hortorum Cultus

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2018

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tom 17

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nr 1

EN

Ceratophyllum demersum L. is a medical plant of the family Ceratophyllaceae that has been traditionally used for the treatment of diseases such as ulcer, diarrhoea, wounds and fever since ancient times. This study presents antioxidant activities of water and methanol extracts of in vitro propagated C. demersum. Shoot tip explants of C. demersum for in vitro plant regeneration were cultured on liquid Murashige and Skoog (MS) medium containing 0.25–1.25 mg/L 6-Benzylaminopurine (BAP) and 0.10 mg/L Thidiazuron (TDZ) combinations for eight weeks. Maximum number of plantlets per explant (110.67) was obtained on MS medium supplemented with 0.75 mg/L BAP + 0.10 mg/L TDZ. In order to determine antioxidant activities of C. demersum, antioxidant contents (β-carotene, flavonoid, lycopene and total phenols), metal chelating and reducing power capacities of methanol and water extracts obtained from C. demersum were investigated. It was detected that water extract was more effective in all activities. Total phenols (76.55 μg/mg) in water extract were measured as the highest antioxidant component. Based on the water extracts data, as IC50 value for chelating on ferrous ions was 9.24 mg/mL, EC50 value for reducing power activity was 8.23 mg/mL. It was also determined that the metal chelating and reducing power activities of the both extracts are increased depending on the concentration. Therefore, all these data suggest that both tested extracts of in vitro propagated C. demersum would exert beneficial effects by virtue of their antioxidant properties and may be utilized as a promising source of therapeutics.

2

Possibilities and limitations of using Lemna minor, Hydrocharis morsus-ranae and Ceratophyllum demersum in removing metals with contaminated water

100%

Gałczyńska M. , Mańkowska N. , Milke J. , Buśko M.

Journal of Water and Land Development

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2019

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tom no. 40

161--173

EN

The paper presents the assessment of possibilities and limitations of the use of Lemna minor, Hydrocharis morsus-ranae and Ceratophyllum demersum in removing metals from contaminated waters. Synthetically discussed the role of these species in phytotechnology and their importance in the assessment of surface water status. The variability of concentration of selected metals in waters and the content of metals in the organs of the analysed plants are presented. Their advantages and disadvantages in removing metals from waters due to biological features have been characterized. Minimum and maximum efficiency of metal removal depending on the scale of water pollution was determined. It was found that analysed plants can be used for phytoremediation of metals from water, but the limitation of effectiveness of treatments is the toxicity of these metals to plants and the time of exposure. The highest removal efficiency can be obtained thanks to the use of sequences of single-species filtration systems.

PL

W pracy przedstawiono ocenę możliwości i ograniczeń stosowania rzęsy drobnej, żabiścieku pływającego i rogatka sztywnego w usuwaniu metali z wód zanieczyszczonych. Syntetycznie omówiono rolę tych gatunków w fitotechnologii i ich znaczenie w ocenie stanu wód powierzchniowych. Przedstawiono zmienność stężenia wybranych metali w środowisku występowania roślin i zawartość metali w organach analizowanych roślin. Scharakteryzowano ich wady i zalety w usuwaniu metali z wód ze względu na cechy biologiczne. Określono minimalną i maksymalną efektywność usuwania metali w zależności od skali zanieczyszczenia wód. Ustalono, że wszystkie analizowane rośliny mogą być wykorzystywane do fitoremediacji metali toksycznych z ekosystemów wodnych, ale ograniczeniem skuteczności zabiegów jest toksyczność tych metali dla roślin i czas ekspozycji. Największą efektywność w usuwaniu metali można uzyskać dzięki zastosowaniu sekwencji jednogatunkowych układów filtracyjnych.

3

Epiphytic chironomids on rigid hornwort (Ceratophyllum demersum L.) – the relation between the community structure and lake status

100%

Tarkowska-Kukuryk M.

Oceanological and Hydrobiological Studies

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2010

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tom 39

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nr 4

4

Rozmieszczenie gatunkow z rodzaju Anthoxanthum L. na terenie wojewodztw katowickiego i bielskiego

88%

Gluch J. , Rostanski A.

Acta Biologica Silesiana

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1994

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tom 25

65-80

5

The effect of lake water characteristics on decomposition of aquatic macrophytes

88%

Kufel L. , Kufel I. , Krolikowska J.

Polish Journal of Ecology

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2004

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tom 52

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nr 3

EN

In situ decomposition of the hornwort (Ceratophyllum demersum L.), the buckbean (Menyanthes trifoliata L.) and leaf blades of the yellow water lily (Nuphar lutea L.) was studied with the litter bag method in three small mid-forest lakes of different pH and nutrient content. Time course of decomposition and of nutrient release from decomposing plant material was best fitted with a logarithm approximation and not by usually used exponential fit. pH of lake waters strongly affected decomposition rates of C. demersum and M. trifoliata. No effect of nutrient concentrations in lake water or in plant tissues on decomposition was noted for any of the analysed plants. Organic carbon deficit is speculated as a possible reason for the observed pH effect on decomposition rates. Modification of particulate and soluble N:P ratios are underlined as a consequence of different N and P release from decomposing plant material.

6

A checklist of Hepaticae and Anthocerotae of Malaysia

75%

Chuach-Petiot M. S.

Polish Botanical Journal

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2011

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tom 56

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nr 1