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Loss of flagella in the green alga Chlamydomonas reinhardtii due to in situ UV-exposure
E. Van Dock and D.O. Hessen

In this preliminary study the flagellated, planktonic green alga Chlamydomonas reinhardtii was exposed to natural UV doses in an oligotrophic alpine lake and a mesotrophic lowland lake, both situated in Norway. The algae, which were incubated in glass, quartz or mylar-covered flasks at different depths, showed a pronounced loss of flagella with increasing UV radiation. Apparently, UV-A was as detrimental as UV-B for the flagella. The potential role of C. reinhardtii as a bio-dosimeter for UV stress, and potential food chain effects are discussed.

Keywords: Phytoplankton, flagella, UV, Daphnia, Chlumydomonas, bio-dosimeter.
Contents of this volume Sci. Mar. 60(Suppl.1) : 107-112 Back PDF
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