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题名: A study on distribution and roles of alkaline phosphatase in sediments of some lakes in the middle and lower reaches of the Yangtze River
作者: Xia Zhuo-Ying ; Chen Fang ; Song Chun-Lei ; Li Jian-Qiu ; Zhou Yi-Yong
通讯作者: Xia Zhuo-Ying ; Chinese Acad Sci, Inst Hydrobiol, Wuhan 430072, Peoples R China
刊名: Acta Hydrobiologica Sinica
发表日期: 2007
卷: 31, 期:1, 页:41169
收录类别: 其他
英文摘要: Phosphorus loadings in sediments play an important role in lake eutrophication and the progress of its recovery. The Phosphor-us release is controlled by physical, chemical and biological mechanisms. Alkaline phosphatase catalyzes remineralization of organic phosphorus and then it may be an important factor accelerating Phosphor-us cycling in sediments. In this paper, we discussed distributions and roles in the phosphorus release of alkaline phosphatase in sediments of some lakes in the middle and lower reaches of the Yangtze River. Alkaline phosphatase activity (APA) in surface sediments in the dredged and undredged zones of the take Wulihu and the different areas of the Lake Taihu, Chaohu, Longganhu, Donghu, Yuehu, Longyanghu and the Lianhuahu are quite different. The spatial heterogeneity is related to the degree of eutrophication. Moreover,APA decreased with the sediment depth and may peak in the intermediate and deeper layers showing a seasonal variation. The enzyme differently responded to its inhibitors. All the facts implied that the enzyme occurred in various forms (isoenzymes). L-Phenylalanine (Phe) enhanced APA in the sediments of the Lake Wulihu and the Lake Yuehu. Reacted with Phe and incubated for one day, the sediments released the bioavailable phosphate ( SRP) with significantly higher concentration, while it inhibited APA, in the sediments of the Lake Yuehu. Reacted with Phe and incubated for one day,the sediments released significantly larger amounts of dissolved organic phosphorus, without increasing the SRP concentration Hence, the SRP released resulted, at least partially, from the hydrolysis of some liable organic phosphorus mediated by APA. Alkaline phosphatase in lake sediments plays an important role inthe release of internal P loadings and eutrophication.
ISSN号: 1000-3207
内容类型: 期刊论文
URI标识: http://ir.ihb.ac.cn/handle/342005/18305
Appears in Collections:中科院水生所知识产出(2009年前)_期刊论文

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Xia Zhuo-Ying; Chen Fang; Song Chun-Lei; Li Jian-Qiu; Zhou Yi-Yong.A study on distribution and roles of alkaline phosphatase in sediments of some lakes in the middle and lower reaches of the Yangtze River,Acta Hydrobiologica Sinica,2007,31(1):41169
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