publication . Article . 2008

Ambient UV-B radiation decreases photosynthesis in high arctic Vaccinium uliginosum.

Albert, Kristian; Ro-Poulsen, Helge; N. Mikkelsen, Teis;
Open Access English
  • Published: 01 Jan 2008 Journal: volume 133, pages 199-210issn: 0031-9317, Copyright policy
Abstract
UV-B-exclusion experiment was established in high arctic Zackenberg, Northeast Greenland, to investigate the possible effects of ambient UV-B on plant performance. During almost a whole growing season, canopy gas exchange and Chl fluorescence were measured on Vaccinium uliginosum (bog blueberry). Leaf area, biomass, carbon, nitrogen and UV-B-absorbing compounds were determined from a late season harvest. Compared with the reduced UV-B treatment, the plants in ambient UV-B were found to have a higher content of UV-B-absorbing compounds, and canopy net photosynthesis was as an average 23% lower during the season. By means of the JIP-test, it was found that the pot...
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