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学科主题: Limnology
题名: Extracellular phosphatases produced by phytoplankton and other sources in shallow eutrophic lakes (Wuhan, China): taxon-specific versus bulk activity
作者: Cao, Xiuyun3; Song, Chunlei3; Zhou, Yiyong3; Strojsova, Alena1, 2; Znachor, Petr1, 2; Zapomelova, Eliska1, 2; Vrba, Jaroslav1, 2
通讯作者: Vrba, J, Univ S Bohemia, Fac Sci, Sadkach 7, Ceske Budejovice 37005, Czech Republic
关键词: ELF97 phosphate ; Phosphorus regeneration ; Polymictic lakes ; Algae ; Heterotrophic flagellates ; Protozoa
刊名: LIMNOLOGY
发表日期: 2009-08-01
DOI: 10.1007/s10201-009-0265-9
卷: 10, 期:2, 页:95-104
收录类别: SCI
文章类型: Article
部门归属: [Strojsova, Alena; Znachor, Petr; Zapomelova, Eliska; Vrba, Jaroslav] Univ S Bohemia, Fac Sci, Ceske Budejovice 37005, Czech Republic; [Strojsova, Alena; Znachor, Petr; Zapomelova, Eliska; Vrba, Jaroslav] Acad Sci Czech Republic, Inst Hydrobiol, Ctr Biol, Ceske Budejovice 37005, Czech Republic; [Cao, Xiuyun; Song, Chunlei; Zhou, Yiyong] Chinese Acad Sci, Inst Hydrobiol, Wuhan 430072, Peoples R China
WOS标题词: Science & Technology ; Life Sciences & Biomedicine
资助者: National Science Foundation of China [30600088]; Grant Agency of the AS CR [kzcx2-yw-426, A6017202]; Sino-Czech Scientific and Technological Cooperation [36-20]; Czech Ministry of Education, Youth and Sports [M 6007665801, ME 617]
类目[WOS]: Limnology
研究领域[WOS]: Marine & Freshwater Biology
摘要: Extracellular phosphatases are an important part of the phosphorus cycle in aquatic environments. Phosphatase activity (PA) in plankton was studied in seven subtropical shallow lakes of different exploitation management and trophic status in the urban area of Wuhan City. Bulk PA was rather high (range 1.1-11 mu mol l(-1) h(-1)), although concentrations of soluble reactive phosphorus (SRP) were also high (range 27 mu g P l(-1) to similar to 1.5 mg P l(-1)) in all lakes. Cell-associated extracellular PA in phytoplankton was detected using the fluorescence-labelled enzyme activity technique. Phytoplankton species partly contributed to the bulk PA. We found explicit differences in the presence of cell-associated phosphatase within the main phytoplankton groups; species belonging to Chlorophyta and Dinophyta were regularly phosphatase-positive, while Cyanophyta and Bacillariophyceae were phosphatase-negative in all but one case. Furthermore, there is a certain potential of extracellular phosphatases produced by heterotrophic nanoflagellates in most of the lakes. This new finding compromises the 'traditional' interpretation of bulk phosphatase data as being due to overall phytoplankton or bacterial P regeneration.
英文摘要: Extracellular phosphatases are an important part of the phosphorus cycle in aquatic environments. Phosphatase activity (PA) in plankton was studied in seven subtropical shallow lakes of different exploitation management and trophic status in the urban area of Wuhan City. Bulk PA was rather high (range 1.1-11 mu mol l(-1) h(-1)), although concentrations of soluble reactive phosphorus (SRP) were also high (range 27 mu g P l(-1) to similar to 1.5 mg P l(-1)) in all lakes. Cell-associated extracellular PA in phytoplankton was detected using the fluorescence-labelled enzyme activity technique. Phytoplankton species partly contributed to the bulk PA. We found explicit differences in the presence of cell-associated phosphatase within the main phytoplankton groups; species belonging to Chlorophyta and Dinophyta were regularly phosphatase-positive, while Cyanophyta and Bacillariophyceae were phosphatase-negative in all but one case. Furthermore, there is a certain potential of extracellular phosphatases produced by heterotrophic nanoflagellates in most of the lakes. This new finding compromises the 'traditional' interpretation of bulk phosphatase data as being due to overall phytoplankton or bacterial P regeneration.
关键词[WOS]: PHOSPHORUS-DEFICIENCY INDICATORS ; ENZYME-LABELED FLUORESCENCE ; FRESH-WATER PHYTOPLANKTON ; ALKALINE-PHOSPHATASE ; SPRING PHYTOPLANKTON ; KINETICS ; DONGHU ; ERKEN ; AVAILABILITY ; ENVIRONMENTS
语种: 英语
WOS记录号: WOS:000268017800003
ISSN号: 1439-8621
Citation statistics:
内容类型: 期刊论文
URI标识: http://ir.ihb.ac.cn/handle/152342/7656
Appears in Collections:中科院水生所知识产出(2009年前)_期刊论文

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作者单位: 1.Univ S Bohemia, Fac Sci, Ceske Budejovice 37005, Czech Republic
2.Acad Sci Czech Republic, Inst Hydrobiol, Ctr Biol, Ceske Budejovice 37005, Czech Republic
3.Chinese Acad Sci, Inst Hydrobiol, Wuhan 430072, Peoples R China

Recommended Citation:
Cao, Xiuyun; Song, Chunlei; Zhou, Yiyong; Strojsova, Alena; Znachor, Petr; Zapomelova, Eliska; Vrba, Jaroslav.Extracellular phosphatases produced by phytoplankton and other sources in shallow eutrophic lakes (Wuhan, China): taxon-specific versus bulk activity,LIMNOLOGY,2009,10(2):95-104
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