在实验室批量培养条件下，测定了海洋微藻培养体系中碱性磷酸酶活力（APA）和各形态溶解磷的动态变化，分析了二者之间的关系.结果表明，在批量培养过程中，APA的动态变化呈“S“形曲线，各形态溶解磷在其变化过程中所起的调控作用不同，介质中溶解无机磷和小分子溶解有机磷的浓度是激发APA发生变化的主要调控因子，大分子溶解有机磷的浓度对APA的作用不明显，但APA的增大可加速微藻利用大分子溶解有机磷的速率.微藻的种类和丰度不影响APA的动态变化形式及其调控机理.It was thought that phosphorus licited the primary productivity in lake while nitrogen in ocean, but recent studies showed that phosphorus limited the phytoplankton growth in the specific coastal waters, results also indicated that Phytoplankton could utilize dissolved organic phosphorus (DOP) and alkaline phosphatase (AP) played an important role in the utilization of DOP.However, the variation and controlling mechanism of AP are still poorly understood.The present study focused on the effects of different species of dissolved phosphorus on the variation of AP in algal batch culture.The results showed that vacation of airline phosphatase activity (APA) was closed to "S" curve, different spotes of dissolved phosphorus had different effects on APA.The concentrations of dissolved inorganic phosphorus and small moleculal dissolved organic phosphorus had a sighficant effect on APA, while the concentration of large molecular dissolved organic phosphorus (LDOP) has little effect on APA, but the increasing of APA could accelerate the decomposing of LDOP in the medium.Results also showed that algae species and abundance had little effect on APA.国家自然科学基金!4920606
