Effect of UV radiation on pigments of the Antarctic macroalga Leptosomia simplex L. |
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| Authors: | Döhler G |
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| Institution: | (1) Institute of Botany, University of Frankfurt, Siesmayerstr. 70, D-60054 Frankfurt a.M., Germany |
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| Abstract: | Impact of UV-A and UV-B radiation on pattern of pigments of the Antarctic macroalga Leptosomia simplex L. was studied during the Polarstern cruise (ANT XII/2) 1994/95 under controlled laboratory conditions. An 8 h exposure to UV-A of 17.6 W m-2 led usually to an increase of carotenoid contents, but to a decrease in contents of chlorophyllide (Chlide) a and chlorophyll (Chl) a. UV-B irradiation (300-320 nm) caused a decrease in contents of Chlide a, lutein, and zeaxanthin, but an increase in contents of Chl a and carotenes. Enhancement of carotenoid contents was attributed to a protection of the photosynthetic apparatus. UV effects on the 15N-ammonium uptake were correlated with the changes in pigment contents. |
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| Keywords: |  - and  gif" alt="agr" align="BASELINE" BORDER="0">- and  -carotenes" target="_blank">gif" alt="beta" align="MIDDLE" BORDER="0">-carotenes chlorophyll chlorophyllide lutein UV-A and UV-B radiation zeaxanthin |
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