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学科主题: Environmental Sciences; Toxicology; Water Resources
题名: Effects of Arsenate on Microcystin Content and Leakage of Microcystis Strain PCC7806 Under Various Phosphate Regimes
作者: Gong, Yan1, 2; Song, Lirong1; Wu, Xingqiang1, 2; Xiao, Bangding1; Fang, Tao1; Liu, Jiantong1
通讯作者: Liu, JT, Chinese Acad Sci, Inst Hydrobiol, Wuhan 430072, Peoples R China
关键词: arsenate ; phosphate ; Microcystis ; microcystins ; cyanobacterium
刊名: ENVIRONMENTAL TOXICOLOGY
发表日期: 2009-02-01
DOI: 10.1002/tox.20392
卷: 24, 期:1, 页:87-94
收录类别: SCI
文章类型: Article
部门归属: [Gong, Yan; Song, Lirong; Wu, Xingqiang; Xiao, Bangding; Fang, Tao; Liu, Jiantong] Chinese Acad Sci, Inst Hydrobiol, Wuhan 430072, Peoples R China; [Gong, Yan; Wu, Xingqiang] Chinese Acad Sci, Grad Sch, Beijing 100039, Peoples R China
WOS标题词: Science & Technology ; Life Sciences & Biomedicine ; Physical Sciences
资助者: State Key Basic Research and Development Plan (973 Plan) [2002CB412300]
类目[WOS]: Environmental Sciences ; Toxicology ; Water Resources
研究领域[WOS]: Environmental Sciences & Ecology ; Toxicology ; Water Resources
摘要: Both arsenic pollution and eutrophication are prominent environmental issues when considering the problem of global water pollution. It is important to reveal the effects of arsenic species on cyanobacterial growth and toxin yields to assess ecological risk of arsenic pollution or at least understand naturally occurring blooms. The sensitivity of cyanobacteria to arsenate has often been linked to the structural similarities of arsenate and phosphate. Thus, we approached the effect of arsenate with concentrations from 10(-8) to 10(-4) M on Microcystis strain PCC7806 under various phosphate regimes. The present study showed that Microcystis strain PCC7806 was arsenate tolerant up to 10(-4) M. And such tolerance was without reference to both content of intra- and extra-cellular phosphate. It seems that arsenate involved the regulation of microcystin synthesis and cellular polyphosphate contributed to microcystin production of Microcystis responding to arsenate, since there was a positive linear correlation of the cellular microcystin quota with the exposure concentration of arsenate when the cells were not preconditioned to phosphate starvation. It is presumed that arsenate could help to actively export microcystins from living Microcystis cells when preconditioned to phosphate starvation and incubated with the medium containing 1 mu M phosphate. This study firstly provided evidence that microcystin content and/or release of Microcystis might be impacted by arsenate if it exists in harmful algal blooms. (C) 2008 Wiley Periodicals, Inc. Environ Toxicol 24:97 94, 2009.
英文摘要: Both arsenic pollution and eutrophication are prominent environmental issues when considering the problem of global water pollution. It is important to reveal the effects of arsenic species on cyanobacterial growth and toxin yields to assess ecological risk of arsenic pollution or at least understand naturally occurring blooms. The sensitivity of cyanobacteria to arsenate has often been linked to the structural similarities of arsenate and phosphate. Thus, we approached the effect of arsenate with concentrations from 10(-8) to 10(-4) M on Microcystis strain PCC7806 under various phosphate regimes. The present study showed that Microcystis strain PCC7806 was arsenate tolerant up to 10(-4) M. And such tolerance was without reference to both content of intra- and extra-cellular phosphate. It seems that arsenate involved the regulation of microcystin synthesis and cellular polyphosphate contributed to microcystin production of Microcystis responding to arsenate, since there was a positive linear correlation of the cellular microcystin quota with the exposure concentration of arsenate when the cells were not preconditioned to phosphate starvation. It is presumed that arsenate could help to actively export microcystins from living Microcystis cells when preconditioned to phosphate starvation and incubated with the medium containing 1 mu M phosphate. This study firstly provided evidence that microcystin content and/or release of Microcystis might be impacted by arsenate if it exists in harmful algal blooms. (C) 2008 Wiley Periodicals, Inc. Environ Toxicol 24:97 94, 2009.
关键词[WOS]: BLUE-GREEN-ALGA ; CYANOBACTERIAL TOXINS ; AERUGINOSA PCC-7806 ; TOLERANCE ; NITROGEN ; GROWTH ; PHYTOPLANKTON ; ACCUMULATION ; COMMUNITIES ; METABOLISM
语种: 英语
WOS记录号: WOS:000263533000011
ISSN号: 1520-4081
Citation statistics:
内容类型: 期刊论文
URI标识: http://ir.ihb.ac.cn/handle/152342/7864
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.Chinese Acad Sci, Inst Hydrobiol, Wuhan 430072, Peoples R China
2.Chinese Acad Sci, Grad Sch, Beijing 100039, Peoples R China

Recommended Citation:
Gong, Yan; Song, Lirong; Wu, Xingqiang; Xiao, Bangding; Fang, Tao; Liu, Jiantong.Effects of Arsenate on Microcystin Content and Leakage of Microcystis Strain PCC7806 Under Various Phosphate Regimes,ENVIRONMENTAL TOXICOLOGY,2009,24(1):87-94
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