摘要
Utilization of dissolved organic phosphorus (DOP) and alkaline phosphatase (APase) activity by Skeletonema costatum, Chaetoceros didymus, Alexandrium tamarense and Heterosigma akashiwo under the phosphorus deficient condition were examined in the laboratory. S. costatum, C. didymus, A. tamarense and H. akashiwo could make use of phosphomonoester and nucleotide compounds for the growth of them as a phosphorus source. APase activity of S. costatum, C. didymus, A. tamarense and H. akashiwo began to be activated at dissolved inorganic phosphorus (DIP) concentrations less than , , and respectively, and their maximum APase activity were , , and , respectively. Although each phytoplankton species displayed different APase activity for DOP utilization, their maximum APase activities were higher than maximum phosphorus uptake rates, inferring that these species might be able to keep growing under DIP-limited conditions thought utilizing effectively the hydrolized product of DOP. This result also implies that utilization of DOP might contribute to not only the growth of red tide forming phytoplankton but also the interspecific competition among phytoplankton species in coastal environments.
摘要译文
Skeletonema costatum，Chaetoceros didymus利用溶解性有机磷（DOP）和碱性磷酸酶（APase）活性，在实验室检查了磷缺乏条件下的塔玛亚历山大藻（Alexandrium tamarense）和赤潮异弯藻（Heterosigma akashiwo）。 S. costatum，C。didymus，A。tamarense和H.akashiwo可以利用磷酸单酯和核苷酸化合物将它们作为磷源生长。 S. costatum，C。didymus，A。tamarense和H.的APase活性akashiwo开始在溶解的无机磷（DIP）浓度分别低于和分别激活，它们的最大APase活性分别为，和。虽然每种浮游植物物种对DOP利用显示出不同的APase活性，但它们的最大APase活性高于最大磷吸收率，推断这些物种可能能够在DIP限制条件下继续生长，因为有效地利用了DOP的水解产物。也意味着DOP的利用可能不仅有助于红潮形成浮游植物的生长，也有助于沿海环境中浮游植物种间的种间竞争。
Oh, Seok-Jin; Kwon, Hyeong-Kyu; Yang, Han-Soeb;. Alkaline Phosphatase Activity and Utilization of Dissolved Organic Phosphorus by Phytoplankton Isolated from Korean Coastal Waters[J]. The Sea, 2010,15(1): 16-24