TY  - JOUR
A1  - Döhler, Günter
T1  - Effect of UV-B radiation on biomass production, pigmentation and protein content of marine diatoms
T2  - Zeitschrift für Naturforschung, C
N2  - Several species of marine diatoms were grown at + 18 °C and + 22 °C under normal air condi­tions (0.035 vol.% C02) at a light/dark alteration of 14: 8̄ h. Intensity of white light was 1 mW (~ 5000 lux). An artifical nutrient solution of 35%o salinity was used. Algae - harvested during exponential growth - were exposed to different intensities of UV-B radiation (439, 717 and 1230 J · m-2 · m-1) for 2 days. UV-B radiation depressed the growth of all tested marine diatoms. Low levels of UV-B resulted in a slight increase of the biomass production (dry weight) compared to not UV-B treated cells. Enhanced UV-B doses caused a diminution of the primary productivity in all species. Algae exposed to UV-B stress showed a marked decrease in the protein and pigment content (chlorophyll a, chlorophyll c1 + c2 and carotenoids). In + 22°C grown cells of Lauderia annulata and Thalassiosira rotula were more sensitive to UV-B radiation than those cultures grown at + 18 °C. Bellerochea yucatanensis cells grown at +22 °C were less affected after UV-B exposure than at +18°C grown algae. The UV-B sensibility and growth of the individual species varied in a mixture of several marine diatoms. Results were discussed with reference to the UV-B effect on metabolic processes.
KW  - UV-B Stress
KW  - Pigment and Protein Content
KW  - Pure Cultures of Marine Diatoms
Y1  - 2014
UR  - http://publikationen.ub.uni-frankfurt.de/frontdoor/index/index/docId/81890
UR  - https://nbn-resolving.org/urn:nbn:de:hebis:30:3-818902
SN  - 0939-5075
SN  - 1865-7125
VL  - 39.1984
IS  - 6
SP  - 634
EP  - 638
PB  - Verlag der Zeitschrift für Naturforschung
CY  - Tübingen
ER  -