| Comparative studies on physiological responses to phosphorus in two phenotypes of bloom-forming Microcystis | |
| Shen, Hong; Song, Lirong; Song, LR, Chinese Acad Sci, State Key Lab Freshwater Ecol & Biotechnol, Inst Hydrobiol, Wuhan 430072, Peoples R China | |
| 2007-11-01 | |
| Source Publication | HYDROBIOLOGIA
 |
| ISSN | 0018-8158 |
| Volume | 592Pages:475-486 |
| Abstract | 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.; 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. |
| Subtype | Article |
| Keyword | Unicellular And Colonial Microcystis Alkaline Phosphatase Activity P-i Uptake Oxygen Evolution Activity F-v/f-m Maximum Electron Transport Rate (Etrmax) |
| Department | Chinese Acad Sci, State Key Lab Freshwater Ecol & Biotechnol, Inst Hydrobiol, Wuhan 430072, Peoples R China; Chinese Acad Sci, Grad Sch, Beijing, Peoples R China |
| Subject Area | Marine & Freshwater Biology |
| DOI | 10.1007/s10750-007-0794-3 |
| WOS Headings | Science & Technology ; Life Sciences & Biomedicine |
| Indexed By | SCI |
| Language | 英语 |
| WOS Research Area | Marine & Freshwater Biology |
| WOS Subject | Marine & Freshwater Biology |
| WOS ID | WOS:000249205000031 |
| WOS Keyword | ALKALINE-PHOSPHATASE ACTIVITY ; BLUE-GREEN-ALGAE ; LIMITED CULTURES ; P-CONCENTRATIONS ; UPTAKE KINETICS ; PHYTOPLANKTON ; AERUGINOSA ; CYANOBACTERIA ; LIMITATION ; CHLOROPHYTA |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://ir.ihb.ac.cn/handle/152342/8456 |
| Collection | 期刊论文 |
| Corresponding Author | Song, LR, Chinese Acad Sci, State Key Lab Freshwater Ecol & Biotechnol, Inst Hydrobiol, Wuhan 430072, Peoples R China |
| Affiliation | 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 |
| Recommended Citation GB/T 7714 | Shen, Hong,Song, Lirong,Song, LR, Chinese Acad Sci, State Key Lab Freshwater Ecol & Biotechnol, Inst Hydrobiol, Wuhan 430072, Peoples R China. 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,&Song, LR, Chinese Acad Sci, State Key Lab Freshwater Ecol & Biotechnol, Inst Hydrobiol, Wuhan 430072, Peoples R China.(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. |
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