Gen-Fu Wu, Xue-Ping Zhou
College of Life Sciences, Zhejiang University, Hangzhou 310012, China.
Water Res. 2005 Nov;39(19):4623-32. doi: 10.1016/j.watres.2005.08.036. Epub 2005 Oct 25.
Phosphorus contents and phosphorus-releasing bacteria were characterized in a small eutrophic lake, Eastern China. Total phosphorus and water soluble inorganic phosphate (WSIP) in water bodies were as high as the levels of hyper-eutrophic lakes. Calcium bound phosphate and organic phosphorus were 2 major forms of phosphorus existing in the sediments. Enumeration of inorganic phosphate-solubilizing bacteria (IPB) and organic phosphorus-mineralizing bacteria (OPB) with culture-dependent method showed that these bacterial groups were not very rich in the ecosystem. Molecular identification and phylogenetic analysis of the predominant IPB and OPB strains indicated that there existed various kinds of bacteria participating in the phosphorus release. Laboratory tests on phosphorus release abilities showed IPB strains could liberate more than 50 microgml(-1), while OPB strains produced less than 2 microgml(-1) WSIP every day.
对中国东部一个小型富营养化湖泊的磷含量和释磷细菌进行了表征。水体中的总磷和水溶性无机磷酸盐（WSIP）高达超富营养化湖泊的水平。钙结合磷酸盐和有机磷是沉积物中存在的两种主要磷形态。采用依赖培养的方法对无机磷酸盐溶解细菌（IPB）和有机磷矿化细菌（OPB）进行计数，结果表明这些细菌类群在该生态系统中并不十分丰富。对主要的IPB和OPB菌株进行分子鉴定和系统发育分析表明，有多种细菌参与磷的释放。磷释放能力的实验室测试表明，IPB菌株每天可释放超过50μg/ml的磷，而OPB菌株每天产生的WSIP不到2μg/ml。
