Comparative studies on physiological responses to phosphorus in two phenotypes of bloom-forming Microcystis
文献类型：期刊论文
| 作者 | Shen, Hong; Song, Lirong |
| 刊名 | HYDROBIOLOGIA
 |
| 出版日期 | 2007-11-01 |
| 卷号 | 592页码:475-486 |
| 关键词 | unicellular and colonial Microcystis alkaline phosphatase activity P-i uptake oxygen evolution activity F-v/F-m maximum electron transport rate (ETRmax) |
| ISSN号 | 0018-8158 |
| 通讯作者 | Song, LR, Chinese Acad Sci, State Key Lab Freshwater Ecol & Biotechnol, Inst Hydrobiol, Wuhan 430072, Peoples R China |
| 中文摘要 | Toxic Microcystis blooms frequently occur in eutrophic water bodies and exist in the form of colonial and unicellular cells. In order to understand the mechanism of Microcystis dominance in freshwater bodies, the physiological and biochemical responses of unicellular ( 4 strains) and colonial ( 4 strains) Microcystis strains to phosphorus ( P) were comparatively studied. The two phenotype strains exhibit physiological differences mainly in terms of their response to low P concentrations. The growth of four unicellular and one small colonial Microcystis strain was significantly inhibited at a P concentration of 0.2 mg l - 1; however, that of the large colonial Microcystis strains was not inhibited. The results of phosphate uptake experiments conducted using P- starved cells indicated that the colonial strains had a higher affinity for low levels of P. The unicellular strains consumed more P than the colonial strains. Alkaline phosphatase activity in the unicellular strains was significantly induced by low P concentrations. Under P- limited conditions, the oxygen evolution rate, Fv/ Fm, and ETRmax were lower in unicellular strains than in colonial strains. These findings may shed light on the mechanism by which colonial Microcystis strains have an advantage with regard to dominance and persistence in fluctuating P conditions. |
| 英文摘要 | Toxic Microcystis blooms frequently occur in eutrophic water bodies and exist in the form of colonial and unicellular cells. In order to understand the mechanism of Microcystis dominance in freshwater bodies, the physiological and biochemical responses of unicellular ( 4 strains) and colonial ( 4 strains) Microcystis strains to phosphorus ( P) were comparatively studied. The two phenotype strains exhibit physiological differences mainly in terms of their response to low P concentrations. The growth of four unicellular and one small colonial Microcystis strain was significantly inhibited at a P concentration of 0.2 mg l - 1; however, that of the large colonial Microcystis strains was not inhibited. The results of phosphate uptake experiments conducted using P- starved cells indicated that the colonial strains had a higher affinity for low levels of P. The unicellular strains consumed more P than the colonial strains. Alkaline phosphatase activity in the unicellular strains was significantly induced by low P concentrations. Under P- limited conditions, the oxygen evolution rate, Fv/ Fm, and ETRmax were lower in unicellular strains than in colonial strains. These findings may shed light on the mechanism by which colonial Microcystis strains have an advantage with regard to dominance and persistence in fluctuating P conditions. |
| WOS标题词 | Science & Technology ; Life Sciences & Biomedicine |
| 学科主题 | Marine & Freshwater Biology |
| 类目[WOS] | Marine & Freshwater Biology |
| 研究领域[WOS] | Marine & Freshwater Biology |
| 关键词[WOS] | ALKALINE-PHOSPHATASE ACTIVITY ; BLUE-GREEN-ALGAE ; LIMITED CULTURES ; P-CONCENTRATIONS ; UPTAKE KINETICS ; PHYTOPLANKTON ; AERUGINOSA ; CYANOBACTERIA ; LIMITATION ; CHLOROPHYTA |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000249205000031 |
| 公开日期 | 2010-10-13 |
| 源URL | [http://ir.ihb.ac.cn/handle/152342/8456]  |
| 专题 | 水生生物研究所_中科院水生所知识产出（2009年前）_期刊论文 |
| 作者单位 | 1.Chinese Acad Sci, State Key Lab Freshwater Ecol & Biotechnol, Inst Hydrobiol, Wuhan 430072, Peoples R China 2.Chinese Acad Sci, Grad Sch, Beijing, Peoples R China |
| 推荐引用方式 GB/T 7714 | Shen, Hong,Song, Lirong. Comparative studies on physiological responses to phosphorus in two phenotypes of bloom-forming Microcystis[J]. HYDROBIOLOGIA,2007,592:475-486. |
| APA | Shen, Hong,&Song, Lirong.(2007).Comparative studies on physiological responses to phosphorus in two phenotypes of bloom-forming Microcystis.HYDROBIOLOGIA,592,475-486. |
| MLA | Shen, Hong,et al."Comparative studies on physiological responses to phosphorus in two phenotypes of bloom-forming Microcystis".HYDROBIOLOGIA 592(2007):475-486. |
入库方式： OAI收割
来源：水生生物研究所
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