Influence of UV-B radiation on photosynthetic activity and chlorophyll fluorescence kinetics in Norway spruce [Picea abies (L.) Karst.] seedlings |
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Authors: | Jože Bavcon Alenka Gaberščik Franc Batič |
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Institution: | (1) Department of Biology, Biotechnical Faculty, University of Ljubljana, Večna pot 111, SLO-61000 Ljubljana, Slovenia;(2) National Institute of Biology, Karlovška 19, SLO-61000 Ljubljana, Slovenia;(3) Department of Agronomy, Biotechnical Faculty, University of Ljubljana, Jamnikarjeva 101, SLO-61000 Ljubljana, Slovenia |
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Abstract: | Norway spruce Picea abies (L.) Karst.] seedlings were grown in greenhouses with two supplemental levels of ultraviolet-B (UV-B) radiation. Photochemical
efficiency of photosystem II and vitality index were determined monthly. At the end of the experiment, growth, chlorophyll
content and photosynthetic rates were measured. The data indicate that low temperature in winter affected light dependent
processes in experimental plants including control, while the rise of ambient temperatures, moderate this effect. The synergistic
effects of UV-B radiation and low temperatures could only be observed in the second winter period. Measurements of net photosynthetic
activity in the second winter period showed significant differences between treated and untreated plants. |
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Keywords: | Ultraviolet-B radiation Norway spruce Picea abies (L ) Karst Photochemical activity Photosynthesis |
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