Comparative studies of glycollic acid uptake by four marine algae

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Abstract
Two marine diatoms, Skeletonema costatum (Grev.) Cleve and Thalassiosira pseudonana 3H, and two marine flagellates Dunaliella primolecta Butcher and Chlamydomonas euryale Lewin were studied for glycollic acid uptake. Only Thalassiosira assimilated appreciable quantities of glycollic acid under optimal photosynthetic conditions, the carbon uptake being about 1% of that in photosynthetic fixation of carbon dioxide. The other algae showed no appreciable glycollic acid uptake under similar conditions. The ability of Thalassiosira pseudonana to take up exogenous glycollic acid was examined particularly with respect to the effects of light and external concentrations of bicarbonate and glycollic acid.