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题名: Physiological and molecular responses to calcium supplementation in Microcystis aeruginosa (Cyanobacteria)
作者: Shi, J-Q1; Wu, Z-X1; Song, L-R2
通讯作者: Wu, ZX (reprint author), Southwest Univ, Key Lab Ecoenvironm Gorges Reservoir Reg 3, Minist Educ,Sch Life Sci, Chongqing Key Lab Plant Ecol & Resources Res Gorg, Chongqing, Peoples R China.
关键词: calcium ; electron transport rate (ETR) ; extracellular polysaccharides (EPS) ; gene expression ; Microcystis aeruginosa
刊名: NEW ZEALAND JOURNAL OF MARINE AND FRESHWATER RESEARCH
发表日期: 2013-03-01
DOI: 10.1080/00288330.2012.741067
卷: 47, 期:1, 页:51-61
收录类别: SCI
文章类型: Article
部门归属: [Shi, J-Q ; Wu, Z-X] Southwest Univ, Key Lab Ecoenvironm Gorges Reservoir Reg 3, Minist Educ,Sch Life Sci, Chongqing Key Lab Plant Ecol & Resources Res Gorg, Chongqing, Peoples R China ; [Song, L-R] Chinese Acad Sci, State Key Lab Freshwater Ecol & Biotechnol, Inst Hydrobiol, Wuhan, Hubei, Peoples R China
WOS标题词: Science & Technology ; Life Sciences & Biomedicine ; Physical Sciences
资助者: Doctoral Found Project of China SWU [SWU110065]; National Natural Science Foundation of China [31170372, 30800123]
类目[WOS]: Fisheries ; Marine & Freshwater Biology ; Oceanography
研究领域[WOS]: Fisheries ; Marine & Freshwater Biology ; Oceanography
摘要: Calcium is an important element in water bodies that plays a pivotal role in numerous biological processes; however, its effects on bloom-forming cyanobacteria have been studied only rarely. In the present study, the effects of calcium on Microcystis aeruginosa, a major bloom-forming cyanobacterium, were investigated. Significant decreases in growth, chlorophyll a and maximum electron transport rate were shown when calcium was absent, while similar reductions in these parameters were also found at high concentrations of calcium (240 mg/l). The expression of psbA, grpE and recA was up-regulated significantly for 0 and 240 mg/l calcium treatments. The activity of catalase (CAT) also increased remarkably under these two treatments, suggesting that Microcystis suffered from stress under both calcium absence and under high calcium concentrations. Additionally, the polysaccharide synthesis gene, epsL, was up-regulated at high concentrations of calcium. These data suggest that calcium plays an important role in the growth of Microcystis, and that enhancement in polysaccharide synthesis in response to increases in calcium concentration might be responsible for bloom formation.
英文摘要: Calcium is an important element in water bodies that plays a pivotal role in numerous biological processes; however, its effects on bloom-forming cyanobacteria have been studied only rarely. In the present study, the effects of calcium on Microcystis aeruginosa, a major bloom-forming cyanobacterium, were investigated. Significant decreases in growth, chlorophyll a and maximum electron transport rate were shown when calcium was absent, while similar reductions in these parameters were also found at high concentrations of calcium (240 mg/l). The expression of psbA, grpE and recA was up-regulated significantly for 0 and 240 mg/l calcium treatments. The activity of catalase (CAT) also increased remarkably under these two treatments, suggesting that Microcystis suffered from stress under both calcium absence and under high calcium concentrations. Additionally, the polysaccharide synthesis gene, epsL, was up-regulated at high concentrations of calcium. These data suggest that calcium plays an important role in the growth of Microcystis, and that enhancement in polysaccharide synthesis in response to increases in calcium concentration might be responsible for bloom formation.
关键词[WOS]: ESCHERICHIA-COLI ; GENE-EXPRESSION ; FRESH-WATER ; SYNECHOCOCCUS-ELONGATUS ; OXYGEN EVOLUTION ; BACTERIA ; BLOOMS ; PHYTOPLANKTON ; ACCLIMATION ; ECOSYSTEMS
语种: 英语
WOS记录号: WOS:000315186200004
ISSN号: 0028-8330
Citation statistics:
内容类型: 期刊论文
URI标识: http://ir.ihb.ac.cn/handle/342005/19356
Appears in Collections:藻类生物学及应用研究中心_期刊论文

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作者单位: 1.Southwest Univ, Key Lab Ecoenvironm Gorges Reservoir Reg 3, Minist Educ,Sch Life Sci, Chongqing Key Lab Plant Ecol & Resources Res Gorg, Chongqing, Peoples R China
2.Chinese Acad Sci, State Key Lab Freshwater Ecol & Biotechnol, Inst Hydrobiol, Wuhan, Hubei, Peoples R China

Recommended Citation:
Shi, JQ; Wu, ZX; Song, LR.Physiological and molecular responses to calcium supplementation in Microcystis aeruginosa (Cyanobacteria),NEW ZEALAND JOURNAL OF MARINE AND FRESHWATER RESEARCH,2013,47(1):51-61
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