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Effects of Arsenate on Microcystin Content and Leakage of Microcystis Strain PCC7806 Under Various Phosphate Regimes
Gong, Yan1,2; Song, Lirong1; Wu, Xingqiang1,2; Xiao, Bangding1; Fang, Tao1; Liu, Jiantong1; Liu, JT, Chinese Acad Sci, Inst Hydrobiol, Wuhan 430072, Peoples R China
2009-02-01
Source PublicationENVIRONMENTAL TOXICOLOGY
ISSN1520-4081
Volume24Issue:1Pages:87-94
AbstractBoth 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.; 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.
SubtypeArticle
KeywordArsenate Phosphate Microcystis Microcystins Cyanobacterium
Department[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
Subject AreaEnvironmental Sciences ; Toxicology ; Water Resources
DOI10.1002/tox.20392
WOS HeadingsScience & Technology ; Life Sciences & Biomedicine ; Physical Sciences
Funding OrganizationState Key Basic Research and Development Plan (973 Plan) [2002CB412300] ; State Key Basic Research and Development Plan (973 Plan) [2002CB412300] ; State Key Basic Research and Development Plan (973 Plan) [2002CB412300] ; State Key Basic Research and Development Plan (973 Plan) [2002CB412300]
Indexed BySCI
Language英语
WOS Research AreaEnvironmental Sciences & Ecology ; Toxicology ; Water Resources
WOS SubjectEnvironmental Sciences ; Toxicology ; Water Resources
WOS IDWOS:000263533000011
WOS KeywordBLUE-GREEN-ALGA ; CYANOBACTERIAL TOXINS ; AERUGINOSA PCC-7806 ; TOLERANCE ; NITROGEN ; GROWTH ; PHYTOPLANKTON ; ACCUMULATION ; COMMUNITIES ; METABOLISM
Funding OrganizationState Key Basic Research and Development Plan (973 Plan) [2002CB412300] ; State Key Basic Research and Development Plan (973 Plan) [2002CB412300] ; State Key Basic Research and Development Plan (973 Plan) [2002CB412300] ; State Key Basic Research and Development Plan (973 Plan) [2002CB412300]
Citation statistics
Cited Times:9[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.ihb.ac.cn/handle/152342/7864
Collection期刊论文
Corresponding AuthorLiu, JT, Chinese Acad Sci, Inst Hydrobiol, Wuhan 430072, Peoples R China
Affiliation1.Chinese Acad Sci, Inst Hydrobiol, Wuhan 430072, Peoples R China
2.Chinese Acad Sci, Grad Sch, Beijing 100039, Peoples R China
Recommended Citation
GB/T 7714
Gong, Yan,Song, Lirong,Wu, Xingqiang,et al. Effects of Arsenate on Microcystin Content and Leakage of Microcystis Strain PCC7806 Under Various Phosphate Regimes[J]. ENVIRONMENTAL TOXICOLOGY,2009,24(1):87-94.
APA Gong, Yan.,Song, Lirong.,Wu, Xingqiang.,Xiao, Bangding.,Fang, Tao.,...&Liu, JT, Chinese Acad Sci, Inst Hydrobiol, Wuhan 430072, Peoples R China.(2009).Effects of Arsenate on Microcystin Content and Leakage of Microcystis Strain PCC7806 Under Various Phosphate Regimes.ENVIRONMENTAL TOXICOLOGY,24(1),87-94.
MLA Gong, Yan,et al."Effects of Arsenate on Microcystin Content and Leakage of Microcystis Strain PCC7806 Under Various Phosphate Regimes".ENVIRONMENTAL TOXICOLOGY 24.1(2009):87-94.
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