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. 2016 Sep 20;7:1476. doi: 10.3389/fmicb.2016.01476

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Copyright © 2016 Zhang, Yuan, Chen, Chen, Li, Liu, Lin and Wang.

This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) or licensor are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

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Physiological parameter variations of Skeletonema costatum grown in different P conditions. (A) Cell density, (B) Fv/Fm, (C) P concentration, (D) Bulk APA, (E) PP content. The red arrow indicates the time point of resupply with Na₂HPO₄ or G-6-P. Each data point is the average of three biological replicates, and error bars represent the standard deviation. Fv/Fm, maximum chlorophyll fluorescence; Bulk APA, bulk alkaline phosphatase activity; P, including inorganic phosphorus and organic phosphorus in the culture media; PP, particulate organic phosphorus.