Author(s): YU Qian, WANG Qing, YUAN Ze-Yi, WU Hui-Feng, ZHAO Jian-Min, Key Laboratory of Coastal Zone Environmental Processes and Ecological Remediation, Yantai Institute of Coastal Zone Research, Chinese Academy of Sciences, University of Chinese Academy of Sciences, National Marine Data and Information Service
Pages: 1018-1023
Year: 2015 Issue:  5
Journal: Oceanologia et Limnologia Sinica
Keyword:  Paralia sulcata; dissolved organic phosphorus; alkaline phosphatase; intracellular 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.