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JOURNAL OF PLANKTON RESEARCH | VOLUME 6 | NUMBER 3 | PAGES 435-442 | 1984
© Oxford University Press

research-article

Time-series uptake of carbon into photosynthetic products of Benguela phytoplankton populations

R.G. Barlow

Sea Fisheries Research Institute Cape Town, South Africa

Received on March 1, 1983; accepted on December 1, 1983 The uptake of carbon into primary and major products of photosynthesis in natural populations has been determined in 4 h and 24 h time-series experiments at 50% of the incident radiation. During active growth the communities assimilated the largestproportion of carbon into poiysaccharides at all time intervals and the amount of label incorporated into primary products was approximately equal to or exceeded that in the proteins and lipids. When there was no growth the synthesis of protein was the dominant metabolic process. The community in experiment 6 appeared to be in an active phase, however, in one experiment the uptake of carbon into protein was faster than with no growth and during the dark period actively growing cells maintained protein production by utilizing carbon stored in the polysaccharides only; stationary growth cells required both primary products and polysacchaiidcs for protein synthesis at night.


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