期刊
JOURNAL OF PHYCOLOGY
卷 44, 期 6, 页码 1379-1383出版社
WILEY-BLACKWELL PUBLISHING, INC
DOI: 10.1111/j.1529-8817.2008.00598.x
关键词
alkaline phosphatase; cellular P quota; chlorophyll; diatoms; green algae; phosphorus limitation; phytoplankton
Single-cell alkaline phosphatase (AP) activity is being increasingly used to characterize phosphorus (P) status of individual species of phytoplankton. As phytoplankton growth rates depend more directly on the internal rather than external P concentrations, we determine the AP activity in the two species of freshwater phytoplankton, Scenedesmus quadricauda (Turpin) Breb. and Asterionella formosa Hassall, as a function of internal P concentration. AP activity strongly correlated with cellular P, increasing almost linearly with decreasing cellular P in both species. The dynamics of initial responses of AP activity to P limitation, as well as the final levels of AP activity, when cellular P approached minimum quotas, differed in two species. After P addition, cellular P concentrations increased rapidly, but AP activity remained high for several days. The lag in AP activity down-regulation following an increase in cellular P made it difficult to infer current P status of cells under dynamic P conditions.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据