东湖紫外光敏感磷与可酶解磷的分布及其相互关系  

Distribution of Phosphatase Hydrolysable Phosphorus and UV-Sensitive Phosphorus Compounds and a Relationship Between Them in Donghu Lake

作　　者：刘华丽[1] 周易勇[2] 李建秋[2] 宋春雷[2] 曹秀云[2] 

机构地区：[1]武汉科技学院,湖北武汉430073 [2]中国科学院水生生物研究所,湖北武汉430072

出　　处：《武汉大学学报（理学版）》2002年第6期705-708,共4页Journal of Wuhan University:Natural Science Edition

基　　金：中国科学院知识创新工程重大项目 (KZCXI SW 12 II 0 2 0 2 );重要方向项目 (KSCXZ SW 10 2 );国家自然科学基金资助项目( 2 0 1770 33;396 70 14 9;39170 16 5 )

摘　　要：初步讨论了武汉东湖不同工作站中紫外光敏感磷 (UVSP)与可酶解磷 (PHP)的季节变化以及间隙水中二者和碱性磷酸酶活性 (APA)的存在及其相互关系 间隙水中PHP与UVSP的存在 ,说明湖泊沉积物亦为间接有效的磷库 紫外光照射可显著提高间隙水中o P的浓度 ,却明显抑制溶解态碱性磷酸酶 (APase)的活性 ,这一结果未能支持UVSP释放o P的过程仍遵从酶促机制的假说 .Phosphorus compounds in lakes can release directly bioavailable orthophosphate (o-P) upon irradiation by UV light (UVSP), or hydrolysis by phosphatase (PHP). Seasonal variations were observed in UVSP in surface water, and PHP in surface, overlying and interstitial water at three experimental stations in Donghu Lake. Occurrence of both PHP and UVSP in interstitial water suggested that sediment could act as a sink of potentially available phosphorus. In interstitial water, o-P was significantly elevated, while dissolved alkaline phosphatase was significantly inhibited. This fact does not support the view that the enzymatic reaction underlies the mechanism of UVSP release.

关 键 词：东湖 湖泊富营养化 紫外光敏感磷 可酶解磷 污染分布 季节变化 酶促机制 

分 类 号：X131.2[环境科学与工程—环境科学]