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Wyszukujesz frazę "pollution area" wg kryterium: Temat


Wyświetlanie 1-2 z 2
Tytuł:
Comparative studies of the leaf morphology and structure of white ash Fraxinus americana L. and London plane tree Platanus acerifolia Willd growing in polluted area
Autorzy:
Dineva, S B
Powiązania:
https://bibliotekanauki.pl/articles/41005.pdf
Data publikacji:
2004
Wydawca:
Polska Akademia Nauk. Instytut Dendrologii PAN
Tematy:
white ash
Fraxinus americana
London planetree
Platanus acerifolia
leaf
industrial area
industrial pollution
heavy polluted industrial area
air pollution
leaf morphology
leaf structure
leaf anatomy
environment pollution
Opis:
The leaf blades of white ash Fraxinus americana L. and London plane tree Platanus acerifolia Willd. growing in heavy polluted industrial areas were studied for morphological and anatomical changes developed under the influence of industrial contamination. The aim of the investigation was to determine and compare the influences of air polluted with SO2, NxOx, Pb, As, Zn, Cu etc. on the morphology and the structure of the leaves of these deciduous trees. Both species are tolerant to environmental changes but with different environmental characteristics and tolerances and they are widely used for planting. Under polluted conditions, the trees strengthened the anatomic xeromorphic characteristics of their leaf structures, which gave them the opportunity to mitigate the stressful conditions of the environment. The observed responses are regarded as adaptive and compensative to the adverse effects of air pollution.
Źródło:
Dendrobiology; 2004, 52; 3-8
1641-1307
Pojawia się w:
Dendrobiology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Content of carotenoids in needles of Pinus sylvestris L. growing in a polluted area
Autorzy:
Matysiak, R.
Powiązania:
https://bibliotekanauki.pl/articles/41281.pdf
Data publikacji:
2001
Wydawca:
Polska Akademia Nauk. Instytut Dendrologii PAN
Tematy:
beta-carotene
violaxanthin
polluted area
carotenoid content
needle
neoxanthin
growing
Pinus sylvestris
environment pollution
lutein
thin-layer chromatography
heavy metal
Opis:
Carotenoids (neoxanthin, violaxanthin, lutein and β-carotene) present in plant cell play a role in photoprotection. Industrial pollution causes oxidative stress in plants, while carotenoids react with free radicals and dissipate the excess of excitation energy. In this way carotenoids prevent the negative influence of free radicals on metabolism and can even restore some of the damages. This is confirmed by results of our analysis of the level of xanthophylls in 16 and 17-year-old trees of Scots pine (Pinus sylvestris L.). Developed from seed collected in north-eastern, the trees grow in a relatively unpolluted control site, and in a polluted site located 2 km for away from the Phosphorus Fertilizer Works. In the polluted site the environment is contaminated with SO2, NOx and F, Al, F, Pb, Cu. The needles analysed in this study were visually undamaged. Material was collected in experimental plot from 6 trees in October'98 and April'99, between 12.00 and 13.00 hours, at full sunlight. The pigments were analysed quantitatively and qualitatively by thin-layer chromatography. The paper presents results of content and distribution of neoxanthin, violaxanthin, lutein and β-carotene of Scots pine needles from a healthy control tree and a stressed tree. Marked differences in pigment levels depended on the stage of needle development and level of pollution.
Źródło:
Dendrobiology; 2001, 46
1641-1307
Pojawia się w:
Dendrobiology
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-2 z 2

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