Acclimation of photosynthesis and pigments to seasonally changing light conditions in the endemic Antarctic red macroalga Palmaria decipiens
Lüder, U.H.; Knoetzel, J.; Wiencke, C. (2002). Acclimation of photosynthesis and pigments to seasonally changing light conditions in the endemic Antarctic red macroalga Palmaria decipiens, in: Arntz, W.E. et al. (Ed.) Ecological studies in the Antarctic sea ice zone: results of EASIZ Midterm Symposium. pp. 231-236
In: Arntz, W.E.; Clarke, A. (Ed.) (2002). Ecological studies in the Antarctic sea ice zone: Results of EASIZ Midterm Symposium. Springer: Berlin. ISBN 3-540-43218-3. 277 pp., meer
Is gerelateerd aan:Lüder, U.H.; Knoetzel, J.; Wiencke, C. (2001). Acclimation of photosynthesis and pigments to seasonally changing light conditions in the endemic Antarctic red macroalga Palmaria decipiens. Polar Biol. 24(8): 598-603. https://dx.doi.org/10.1007/s003000100260, meer
|
| Trefwoorden |
Chemical compounds > Organic compounds > Carbohydrates > Glycosides > Pigments > Photosynthetic pigments
Chemical reactions > Photochemical reactions > Photosynthesis
Light duration
Seasonal changes
Palmaria decipiens (Reinsch) R.W.Ricker, 1987 [WoRMS]
PSW, Antarctica, South Shetland I., King George I. [Marine Regions]
Marien/Kust |
| Auteurs | | Top |
- Lüder, U.H.
- Knoetzel, J.
- Wiencke, C.
|
|
|
| Abstract |
The influence of seasonally fluctuating Antarctic daylengths on the photosynthetic apparatus of Palmaria decipiens was studied in culture experiments. Maximal photosynthetic activity (ETRmax) and maximal quantum yield (Fv/Fm), measured by in vivo chlorophyll fluorescence, and concentrations of pigments (phycobiliproteins and Chl a) were determined monthly. Fv/Fm remained constantly high between 0.62 and 0.67 during mid-autumn, winter and spring. ETRmax and pigment contents increased continuously in mid-autumn and winter and were highest in spring. A positive correlation between pigments and ETRmax was found. In summer, ETRmax, Fv/Fm and pigment levels decreased to their lowest values. P. decipiens acclimated by increasing phycobilisome (PBS) number and changing PBS structure, probably changing rod length and rod number. The data show that P. decipiens is efficiently adapted to the short period of favourable light conditions in the field. A photoperiodic control of pigment synthesis triggered by daylength is suggested. |
|
