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EFFECTS OF DIFFERENT PHOSPHORUS SUBSTRATES ON GROWTH AND PHOSPHATASE ACTIVITY OF ALGAE PARALIS SULCATA
Author(s): 
Pages: 1018-1023
Year: Issue:  5
Journal: Oceanologia et Limnologia Sinica

Keyword:  Paralia sulcatadissolved organic phosphorusalkaline phosphataseintracellular phosphorus;
Abstract: We used five phosphorus substrates, i.e., KH2PO4, sodium-β-glycerophosphate(β-G-P), glucose-6-phosphate(G-6-P), lecithin(LEC), and adenosine disodium triphosphate(ATP) to explore the effects on growth and phosphatase activity of Paralia sulcata. It was found that P. sulcata could utilize all five phosphorus substrates to support the growth, and DOP(dissolved organic phosphorus) was better than orthophosphate for the growth of P. sulcata. The change in alkaline phosphatase(AP) activity suggested that large molecular DOP(LEC for example) could be utilized in phosphatase hydrolysis. Furthermore, high external phosphorus concentration would eventually cause high intracellular phosphorus in P. sulcata. Therefore, P. sulcata could utilize intracellular phosphorus to sustain growth under depletion of dissolved phosphorus.
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