Effect of Salinity on Photosynthetic 14C02 Fixation and Amino Acid Pools of Bellerochea yucatanensis
نویسنده
چکیده
14C 0 2 Fixation, Amino Acid Pools, Salinity, Marine Diatoms The marine diatoms Bellerochea yucatanensis and Thalassiosira rotula were grown at different salinities (20/25, 35, and 40/45%o salinity (S), respectively) under normal air (0.035 vol.% C 0 2). No significant variations in the percentage of gross photosynthetic products (e.g. total amino acids, sugar phosphates) were found as a function of salinity during growth. The bulk of the soluble 14C-radioactivity was detected in amino acids. 14C-labelling of glutamine increased mark edly with salinity. Low salt — grown algae are characterized by enhanced amino acid pools, mainly of aspartic acid, asparagine and glutamine. It was found that the tested amino acids are not involved in osmoregulation.
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