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Effects of arsenate on the growth and microcystin production of Microcystis aeruginosa isolated from Taiwan as influenced by extracellular phosphate
Gong, Yan1,2; Chou, Hong-Nong4; Tu, Chi-dao5; Liu, Xi1,3; Liu, Jiantong1; Song, Lirong1; Liu, JT, Chinese Acad Sci, Inst Hydrobiol, Wuhan 430072, Peoples R China
2009-04-01
Source PublicationJOURNAL OF APPLIED PHYCOLOGY
ISSN0921-8971
Volume21Issue:2Pages:225-231
AbstractArsenic pollution and eutrophication are both prominent issues in the aquaculture ponds of Taiwan. It is important to study the effects of arsenic on algal growth and toxin production in order to assess the ecological risk of arsenic pollution, or at least to understand naturally occurring ponds. The sensitivity of algae to arsenate has often been linked to the structural similarities between arsenate and phosphate. Thus, in this study we examined the effects of arsenate (10(-8) to 10(-4) M) on Microcystis aeruginosa TY-1 isolated from Taiwan, under two phosphate regimes. The present study showed that M. aeruginosa TY-1 was arsenate tolerant up to 10(-4) M, and that this tolerance was not affected by extracellular phosphate. However, it seems that extracellular phosphate contributed to microcystin production and leakage by M. aeruginosa in response to arsenate. Under normal phosphate conditions, total toxin yields after arsenate treatment followed a typical inverted U-shape hormesis, with a peak value of 2.25 +/- 0.06 mg L-1 in the presence of 10(-7) M arsenate, whereas 10(-8) to 10(-6) M arsenate increased leakage of similar to 75% microcystin. Under phosphate starvation, total toxin yields were not affected by arsenate, while 10(-6) and 10(-5) M arsenate stimulated microcystin leakage. It is suggested that arsenate may play a role in the process of microcystin biosynthesis and excretion. Given the arsenic concentrations in aquaculture ponds in Taiwan, arsenate favors survival of toxic M. aeruginosa in such ponds, and arsenate-stimulated microcystin production and leakage may have an impact on the food chain.; Arsenic pollution and eutrophication are both prominent issues in the aquaculture ponds of Taiwan. It is important to study the effects of arsenic on algal growth and toxin production in order to assess the ecological risk of arsenic pollution, or at least to understand naturally occurring ponds. The sensitivity of algae to arsenate has often been linked to the structural similarities between arsenate and phosphate. Thus, in this study we examined the effects of arsenate (10(-8) to 10(-4) M) on Microcystis aeruginosa TY-1 isolated from Taiwan, under two phosphate regimes. The present study showed that M. aeruginosa TY-1 was arsenate tolerant up to 10(-4) M, and that this tolerance was not affected by extracellular phosphate. However, it seems that extracellular phosphate contributed to microcystin production and leakage by M. aeruginosa in response to arsenate. Under normal phosphate conditions, total toxin yields after arsenate treatment followed a typical inverted U-shape hormesis, with a peak value of 2.25 +/- 0.06 mg L(-1) in the presence of 10(-7) M arsenate, whereas 10(-8) to 10(-6) M arsenate increased leakage of similar to 75% microcystin. Under phosphate starvation, total toxin yields were not affected by arsenate, while 10(-6) and 10(-5) M arsenate stimulated microcystin leakage. It is suggested that arsenate may play a role in the process of microcystin biosynthesis and excretion. Given the arsenic concentrations in aquaculture ponds in Taiwan, arsenate favors survival of toxic M. aeruginosa in such ponds, and arsenate-stimulated microcystin production and leakage may have an impact on the food chain.
SubtypeArticle
KeywordArsenate Phosphate Cyanobacterium Microcystis Aeruginosa Microcystins
Department[Gong, Yan; Liu, Xi; Liu, Jiantong; Song, Lirong] Chinese Acad Sci, Inst Hydrobiol, Wuhan 430072, Peoples R China; [Gong, Yan] Hubei Acad Agr Sci, Agr Testing & Informat Ctr, Wuhan 430064, Peoples R China; [Liu, Xi] Chinese Acad Sci, Grad Sch, Beijing 100039, Peoples R China; [Chou, Hong-Nong] Natl Taiwan Univ, Inst Fisheries Sci, Taipei 10617, Taiwan; [Tu, Chi-dao] Natl Cent Univ, Dept Chem, Tao Yuan 32001, Taiwan
Subject AreaBiotechnology & Applied Microbiology ; Marine & Freshwater Biology
DOI10.1007/s10811-008-9353-1
WOS HeadingsScience & Technology ; Life Sciences & Biomedicine
Funding OrganizationState Key Basic Research and Development Plan [2002CB412304] ; State Key Basic Research and Development Plan [2002CB412304] ; State Key Basic Research and Development Plan [2002CB412304] ; State Key Basic Research and Development Plan [2002CB412304]
Indexed BySCI
Language英语
WOS Research AreaBiotechnology & Applied Microbiology ; Marine & Freshwater Biology
WOS SubjectBiotechnology & Applied Microbiology ; Marine & Freshwater Biology
WOS IDWOS:000264483600008
WOS KeywordCYANOBACTERIAL TOXINS ; PUBLIC-HEALTH ; CHLORELLA SP ; TOXICITY ; ACCUMULATION ; TOLERANCE ; NITROGEN ; PHYTOPLANKTON ; COMMUNITIES ; INHIBITION
Funding OrganizationState Key Basic Research and Development Plan [2002CB412304] ; State Key Basic Research and Development Plan [2002CB412304] ; State Key Basic Research and Development Plan [2002CB412304] ; State Key Basic Research and Development Plan [2002CB412304]
Citation statistics
Cited Times:14[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.ihb.ac.cn/handle/152342/7804
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.Hubei Acad Agr Sci, Agr Testing & Informat Ctr, Wuhan 430064, Peoples R China
3.Chinese Acad Sci, Grad Sch, Beijing 100039, Peoples R China
4.Natl Taiwan Univ, Inst Fisheries Sci, Taipei 10617, Taiwan
5.Natl Cent Univ, Dept Chem, Tao Yuan 32001, Taiwan
Recommended Citation
GB/T 7714
Gong, Yan,Chou, Hong-Nong,Tu, Chi-dao,et al. Effects of arsenate on the growth and microcystin production of Microcystis aeruginosa isolated from Taiwan as influenced by extracellular phosphate[J]. JOURNAL OF APPLIED PHYCOLOGY,2009,21(2):225-231.
APA Gong, Yan.,Chou, Hong-Nong.,Tu, Chi-dao.,Liu, Xi.,Liu, Jiantong.,...&Liu, JT, Chinese Acad Sci, Inst Hydrobiol, Wuhan 430072, Peoples R China.(2009).Effects of arsenate on the growth and microcystin production of Microcystis aeruginosa isolated from Taiwan as influenced by extracellular phosphate.JOURNAL OF APPLIED PHYCOLOGY,21(2),225-231.
MLA Gong, Yan,et al."Effects of arsenate on the growth and microcystin production of Microcystis aeruginosa isolated from Taiwan as influenced by extracellular phosphate".JOURNAL OF APPLIED PHYCOLOGY 21.2(2009):225-231.
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