Effect of UV radiation on pigments of the Antarctic macroalga Leptosomia simplex L.

• Main Author: Döhler, G.
• Language: English
• Subjects: α- and β-carotenes; chlorophyll; chlorophyllide; lutein; UV-A and UV-B radiation; zeaxanthin; Antarctic; The Antarctic; Antarc*
• Online Access: https://kramerius.lib.cas.cz/view/uuid:b3a7e6c5-7b71-453a-8e84-c8125f930d2a; https://doi.org/10.1023/A:1006932922895

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.