The influence of ultraviolet-B radiation on the growth, pigment production and chlorophyll fluorescence of Norway spruce seedlings

• Autorzy: Pukacki P M , Modrzynski J.
• Języki publikacji: EN

Abstrakty

EN

Norway spruce (Picea abies (L.)Karst.) from seven seed sources was grown in a greenhouse with 8.3 and 14.7 kJ·m⁻²·d⁻¹ m UV-BBE (biologically effective UV-B: 280–320 nm) irradiation, and with no supplemental irradiation as control. The seedlings total biomass (dry weight) and shoot growth decreased with high UV-B treatment but spruce from low elevation seed sources were more affected. The seedlings grown at the highest UV-B irradiance (14.7 kJ·m⁻²·d⁻¹) showed from 5 to 38% inhibition of total biomass and 15 to 70 % shoot growth inhibition. Norway spruce populations from higher altitude seed sources manifested greater tolerance to UV-B radiation compared to plants from low altitudes. Changes in phospholipids and protective pigments were also determined. The plants grown at the lower UV-B irradiance (8.3 kJ·m⁻²·d⁻¹) showed greater ability to concentrations UV-B-absorbing pigments then control plants. Chlorophyll a fluorescence parameter Rfd, (Rfd=(Fm-Fs)/Fs) showed a significant decrease in needles of UV-B treated plants and this correlated with the altitude of seed source. Exposure to UV-B affect levels of the ratio of variable to maximum fluorescence (Fv/Fm). Results from this study suggest that the response to increased levels of UV-B radiation is depended upon the ecotypic differentiation of Norway spruce and involved changes in metabolites in plant tissues.

Słowa kluczowe

EN

biomass; pigment; Norway spruce; stress tolerance; pigment production; Picea abies; chlorophyll fluorescence; spruce; growth; ultraviolet-B radiation

• Wydawca: -
• Czasopismo: Acta Physiologiae Plantarum
• Rocznik: 1998
• Tom: 20
• Numer: 3
• Opis fizyczny: p.245-250,fig.

Twórcy

autor

Pukacki P M

• Polish Academy of Sciences, PL-62-035 Kornik, Poland

autor

Modrzynski J.

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