Impact of ultraviolet-B radiation on two species of forest dwarf shrubs : bilberry (Vaccinium myrtillus L.) and cowberry (Vaccinium vitis-idaea L.)

• Autorzy: Robakowski P.
• Języki publikacji: EN

Abstrakty

EN

Impact of UV-B irradiation on chlorophyll content and chlorophyll fluorescence of two dwarf shrub species: Vaccinium myrtillus L. and Vaccinium vitis-idaea L. was investigated. The plants originating from different latitudes were used. The experiment was carried in the greenhouse. Three variants of ultraviolet-B irradiation were applied = O, lower dose = 11.32 and higher dose = 22.64 kJ m^-2 day^-1 UV-B[BE] (biologically effective dose of UV-B). Measurements of chlorophyll fluorescence and chlorophyll content were carried out. The response of dwarf shrubs to the increased UV-B radiation depended on UV-B dose, species traits and provenance. Vaccinium vitis-idaea was less sensitive to UV-B than Vaccinium myrtillus. The permanent discoloration was observed only on Vaccinium myrtillus leaves. The leaf bud brea of this species was accelerated at high UV-B dose compared to the control. The UV-B radiation influenced its photosynthetic apparatus: the chlorophyll content in leaves was reduced, the maximal and the steady state fluorescence of chlorophyll were diminished. The chlorophyll content in leaves of Vaccinium vitis-idaea did not change significantly but the relative vitality index and the steady state fluorescence were modified under the influence of the radiation.

Słowa kluczowe

EN

chlorophyll content; chlorophyll fluorescence; dwarf shrubs; phenology; UVB radiation

• Wydawca: Museum and Institute of Zoology, Polish Academy of Sciences
• Czasopismo: Polish Journal of Ecology
• Rocznik: 1999
• Tom: Vol. 47, no 1
• Strony: 3--13
• Opis fizyczny: Bibliogr. 19 poz., rys., tab.

Twórcy

autor

Robakowski P.

• Unversity of Agriculture, Department of Forestry, 60-625 Poznań

Bibliografia

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