Bioaccumulation and excretion of arsenic compounds by a marine unicellular alga, <i>polyphysa peniculus</i>

Cullen, William R.; Harrison, Lionel G.; Li, Hao; Hewitt, Gary M.

doi:10.1002/aoc.590080406

Cited by 85 publications

(49 citation statements)

References 39 publications

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“…We speculated that MMA was not present due to the speed of MMA transformation to DMA. Similar result has also been reported by Cullen et al (1994), when P.…”

Section: Discussionsupporting

confidence: 91%

“…Edmonds et al (1997) reported that when the unicellular microalga, Chaetoceros concavicornis was grown axenically in As(V) enriched water, oxoarsenosugar-sulfate (arsenosugar 4) was identified as the major As metabolite. Cullen et al (1994) cultured a unicellular microalga, Polyphysa peniculus, in artificial seawater with As(V) and As(III), and identified DMA as the major metabolic product in both the cells and the medium. However, little is known about whether marine microalgae can volatilize As and their potential contribution to the biogeochemical cycle of As.…”

Section: Introductionmentioning

confidence: 99%

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Biomethylation and volatilization of arsenic by the marine microalgae Ostreococcus tauri

et al. 2013

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“…We speculated that MMA was not present due to the speed of MMA transformation to DMA. Similar result has also been reported by Cullen et al (1994), when P.…”

Section: Discussionsupporting

confidence: 91%

Section: Introductionmentioning

confidence: 99%

Biomethylation and volatilization of arsenic by the marine microalgae Ostreococcus tauri

et al. 2013

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“…Klumpp and Peterson (1981) claimed that the brown macroalga, Fucus spiralis, took up the arsenic as arsenate and transformed it into watersoluble organoarsenic compounds which were then further transformed into a lipid-soluble organoarasenic compound and 12 water-soluble organoarsenic compounds. Cullen et al (1994) found that Polyphysa peniculus transformed arsenate into arsenite and dimethylarsinate. However, few studies have been done on the transformation of arsenic in algae at different growth stages.…”

Section: Discussionmentioning

confidence: 99%

Arsenic and cadmium in the marine macroalgae (Porphyra yezoensis and Laminaria Japonica) — forms and concentrations

Zhao

Shang

Ning

et al. 2012

Chemical Speciation & Bioavailability

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Total arsenic, inorganic arsenic (iAs), total cadmium concentrations and chemical forms of cadmium were analysed in Porphyra yezoensis collected monthly from January to April in 2011 and in Laminaria Japonica collected monthly from March to July in 2010. Results showed that total As concentrations in P. yezoensis were much lower than those in L. Japonica. The iAs concentrations in both macroalgae were all below the maximum limit according to the legislation in China, while total Cd concentrations in all samples of P. yezoensis exceeded the maximum limit. The percentage of iAs to total As decreased in both macroalgae with the time. The results provide important information showing that both macroalgae are able to metabolise inorganic arsenic to organic forms. Thus both macroalgae have evolved arsenic resistance which is linked to the capability of metabolising toxic inorganic arsenic. In addition, the results suggest that the transformation rate of arsenate to organic arsenic in both algae increases with the growth and metabolic rate that increase with elevated environmental temperature. Temperatures rise from January to April in Jiangsu province and from March to July in Liaoning Province. Most Cd was associated with pectates and protein (extractable by 1 M NaCl) in both algae, and only a small percentage of the Cd was inorganic (extractable by 80% ethanol). The Cd chemical forms have no obvious relationship with the time in both algae.

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“…Few reports on the toxicity of arsenic species to Microcystis species have been documented, although studies on uptake and transformation of arsenic species by other phytoplankton have been performed [3,16,17]. In the present study, the inhibitory threshold concentration of As(III) to growth of M. aeruginosa FACHB 905 in culture was between 10 −5 and 10 −4 mol L −1 (Figure 1).…”

Section: Discussionmentioning

confidence: 45%

Effects of inorganic arsenic on growth and microcystin production of a Microcystis strain isolated from an algal bloom in Dianchi Lake, China

Gong

Liu

et al. 2011

Chin. Sci. Bull.

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Our previous data have shown that inorganic arsenic concentrations were high in Dianchi Lake, China, where Microcystis blooms often occur. To explore the relationship between arsenic and the growth of Microcystis, the effects of arsenite [As(III)] and arsenate [As(V)] on the growth and toxin production of M. aeruginosa strain FACHB 905 were tested. Results showed that M. aeruginosa FACHB 905 was tolerant to inorganic arsenic and its growth was not inhibited when the concentration of As(III) was below 10 −5 mol L −1 or that of As(V) below 10 −3 mol L −1. Total microcystin production was stimulated in the presence of 10 −7 mol L −1As(III) and the response of this M. aeruginosa strain to As(III) seemed to be a typical inverted U-shaped hormesis. The content increase of microcystin-LR per cell indicated that the toxicity was enhanced as M. aeruginosa FACHB 905 was exposed to As(V). Considering the relatively high concentration of inorganic arsenic in Dianchi Lake (139 μg L −1 in epilimnetic water), the origin of the M. aeruginosa strain, inorganic arsenic favors survival of M. aeruginosa FACHB 905 and may stimulate its microcystin production and cellular toxicity.inorganic arsenic, cyanobacteria, Microcystis aeruginosa, microcystin Citation: Gong Y, Ao H Y, Liu B B, et al. Effects of inorganic arsenic on growth and microcystin production of a Microcystis strain isolated from an algal bloom in Dianchi Lake, China. Chinese Sci Bull, 2011Bull, , 56: 2337Bull, −2342Bull, , doi: 10.1007 Arsenic is a ubiquitous toxic element in aquatic environments and its residence time in freshwater has been estimated at about 50 years [1]. The main arsenic species, including arsenate [As(V)], arsenite [As(III)], monomethylarsonic acid (MMAA), and dimethylarsinic acid (DMAA), have been found to be toxic to phytoplankton at different potencies and different species have different effects [2][3][4][5]. As(III) inhibits the incorporation of carbon into glutamate [2]. As(V) inactivates the phosphate transport system and glucose metabolism, because of its similar structure to phosphate, and is readily co-transported into the cell [5,6]. Methylated species are shown to be less toxic or even non-toxic and, therefore, are regarded as detoxified products of some algae [7,8]. Previous studies indicated that algal sensitivity to inorganic arsenic may be species specific [6,9,10].Microcystis is a dominant cyanobacterium that blooms in the hypertrophic Dianchi Lake, Kunming, China [11]. A previous survey of this lake showed that the inorganic arsenic concentration (arsenate plus arsenite) was 139 μg L −1 in epilimnetic water and 332 mg kg −1 in sediment (data not shown). It is still unclear whether the occurrence of Micro- et al. Chinese Sci Bull August (2011) Vol.56 No.22 cystis blooms in the lake is linked with arsenic abundance, and whether arsenic affects the toxin production of Microcystis species, if the linkage exists. The effects of As(III) and As(V) on growth and toxin production of M. aeruginosa, isolated from a harmful algal bloom, ...

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Bioaccumulation and excretion of arsenic compounds by a marine unicellular alga, polyphysa peniculus

Cited by 85 publications

References 39 publications

Biomethylation and volatilization of arsenic by the marine microalgae Ostreococcus tauri

Biomethylation and volatilization of arsenic by the marine microalgae Ostreococcus tauri

Arsenic and cadmium in the marine macroalgae (Porphyra yezoensis and Laminaria Japonica) — forms and concentrations

Effects of inorganic arsenic on growth and microcystin production of a Microcystis strain isolated from an algal bloom in Dianchi Lake, China

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