New Zealand Journal of Marine and Freshwater Research abstracts

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Formation and functional significance of storage products in cyanobacteria

JACCO KROMKAMP*

Department of Microbiology University of Amsterdam Nieuwe Achtergracht 127 1018 WS Amsterdam The Netherlands

Abstract The most common storage products of cyanobacteria are polyphosphate as a phosphorus storage compound, cyanophycin or phycobilin protein pigment as nitrogen storage products, and glycogen as a storage product of both carbon and energy. Nutrient uptake kinetics are regulated by the storage pools, and the patterns of regulation have a feedback effect on the amount of accumulated nutrient in the cells. Besides having a storage function the nutrient storage products are likely to act as metabolic sinks during conditions of energy stress. Regulation of storage products is especially strict in light-limited cultures. By increasing the rate of polysaccharide formation during growth with short photoperiods, cyanobacteria are able to sustain relatively high growth rates. This effect is enhanced by keeping respiratory losses very low.

Keywords blue-green algae; cyanobacteria; carbohydrate; cyanophycin; nitrogen; nutrients; phosphorus; phycocyanin; polyphosphate; storage compounds

New Zealand Journal of Marine and Freshwater Research, 1987, Vol. 21: 457-465 0028-8330/87/2103-0457$2.50/0 © Crown copyright 1987 Received 19 February 1987; accepted 21 April 1987

PDF file of entire paper: medium quality (898K); (scanned from paper original: notes about this process)

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