Arsenic speciation and transport in Pteris vittata L. and the effects on phosphorus in the xylem sap

Kertulis, Gina; Lena, Q.; MacDonald, Gregory E.; Chen, R.; Winefordner, J. D.; Cai, Yong

doi:10.1016/j.envexpbot.2004.09.001

Cited by 71 publications

(51 citation statements)

References 25 publications

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“…and up to 94% of the arsenic in the fronds is present as arsenite. Similar results were observed when arsenic was supplied to ferns in several different forms Kertulis et al, 2005). Regardless of the arsenic species supplied to the fern, >90% of the total arsenic in the roots is present as arsenate, versus approximately 94% arsenite in the fronds.…”

Section: Arsenic Species In Ferns -supporting

confidence: 71%

“…However, some plants can survive and even grow well when they accumulate high concentrations of toxic elements, as is the case of the hyperaccumulator plants. In ferns like P. vittata, arsenic is taken up at high rates and at concentration proportional to the arsenic concentrations in the growth media (Ma et al, 2001;Zhang et al, 2002;Wang et al, 2002;Kertulis et al, 2005), at least up to a certain point where arsenic availability becomes a limiting factor and the plant arsenic concentration exceeds the detoxification ability of the plants.…”

Section: Arsenic Species In Ferns -mentioning

confidence: 99%

“…Pteris vittata has been shown to be capable of taking up both inorganic and organic arsenic species, including arsenate, arsenite, and monomethylarsonic acid (MMA) (Figure 4), concentrating up to 93% of the arsenic in the fronds (Ma et al, 2001;Kertulis et al, 2005). Their research on arsenic hyperaccumulation by P. vittata showed that arsenic exists in the plant mostly as inorganic species, after growing for two and six weeks in uncontaminated soil (6 mg kg -1 As) and Ascontaminated soil (400 mg kg -1 As).…”

Section: Arsenic Species In Ferns -mentioning

confidence: 99%

See 2 more Smart Citations

Arsenic phytoextraction and hyperaccumulation by fern species

Gonzaga

Santos

Qiying

2006

Sci. agric. (Piracicaba, Braz.)

123

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Arsenic (As) is an ubiquitous trace metalloid found in all environmental media. Its presence at elevated concentrations in soils derives from both anthropogenic and natural inputs. Arsenic is a toxic and carcinogenic element, which has caused severe environmental and health problem worldwide. Technologies currently available for the remediation of arsenic-contaminated sites are expensive, environmentally disruptive, and potentially hazardous to workers. Phytoextraction, a strategy of phytoremediation, uses plants to clean up contaminated soils and has been successfully applied to arsenic contaminated soils. It has the advantage of being cost-effective and environmentally friendly. A major step towards the development of phytoextraction of arsenic-impacted soils is the discovery of the arsenic hyper accumulation in ferns, first in Pteris vittata, which presented an extraordinary capacity to accumulate 2.3% arsenic in its biomass. Another fern, Pityrogramma calomelanos was found to exhibit the same hyperaccumulating characteristics. After that, screening experiments have revealed that the Pteris genus is really unique in that many species have the potential to be used in phytoextraction of arsenic. In general, these plants seem to have both constitutive and adaptive mechanisms for accumulating or tolerating high arsenic concentration. In the past few years, much work has been done to understand and improve the hyperaccumulating capability of these amazing plants. In particular, the field of molecular biology seems to hold the key for the future of the phytoremediation. Key words: environmental contamination, hyperaccumulator plants, phytoremediation FITOEXTRAÇÃO E HIPERACUMULAÇÃO DE ARSÊNIO POR ESPÉCIES DE SAMAMBAIASRESUMO: O arsênio e um metalóide traço encontrado basicamente em todos os ambientes. Elevadas concentrações de arsênio no solo podem acontecer naturalmente devido ao intemperismo de rochas ricas em arsênio, como também de atividades antropogênicas. O arsênio é um elemento tóxico e cancerígeno. Em muitas partes do mundo, a contaminação pelo arsênio tem causado problemas ambientais e de saude. As técnicas disponíveis para a remediação do arsênio são economicamente proibitivas, destroem a paisagem natural e ainda podem afetar a saúde de pessoas diretamente envolvidas no processo. A fitoextração, uma das estratégias da fitoremediação, utiliza plantas para descontaminar solos e tem sido aplicada com sucesso em solos contaminados com arsênio e outros elementos. Dentre muitas vantagens, essa técnica tem baixo custo quando comparada com as convencionais. Um ponto chave no desenvolvimento da fitoextração foi a constatação de que samambaias hiperacumulam arsênio. Primeiro, em Pteris vittata, que apresentou extraordinária capacidade para remover arsênio do solo, concentrando 2.3% do arsênio na biomassa. Em seguida, foi observado que a samambaia Pityrogramma calomelanos possui capacidade semelhante para acumular arsênio. Essa característica peculiar foi observada em outras samambaias do genero Pteris. Em...

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Section: Arsenic Species In Ferns -supporting

confidence: 71%

Section: Arsenic Species In Ferns -mentioning

confidence: 99%

Section: Arsenic Species In Ferns -mentioning

confidence: 99%

See 1 more Smart Citation

Arsenic phytoextraction and hyperaccumulation by fern species

Gonzaga

Santos

Qiying

2006

Sci. agric. (Piracicaba, Braz.)

123

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“…The DMA component decreased from the rhizoids to the pinnae, and only 54% of the residue remained in the pinnae of P. vittata (Figure 3). Studies on As species in xylem sap showed that As was presented mainly as its original form, with only a low concentration of demethylated inorganic As in xylem sap, when P. vittata was treated with DMA (36,37). Thus, the lower DMA residue in the fronds suggests that the demethylation mainly takes place in shoot tissues.…”

Section: Table 2 Arsenic Accumulation and Translocation Factor (Tf) mentioning

confidence: 99%

Difference of Toxicity and Accumulation of Methylated and Inorganic Arsenic in Arsenic-Hyperaccumulating and -Hypertolerant Plants

Huang

Chen

Lei

et al. 2008

Environ. Sci. Technol.

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The arsenic (As) hyperaccumulators, Pteris vittata and Pteris cretica and an As-tolerant plant Boehmeria nivea, were selected to compare the toxicity, uptake, and transportation of inorganic arsenate (As(V)) and its methylated counterpart dimethylarsinic acid (DMA). The XANES method was used to elucidate the effect of As species transformation on As toxicity and accumulation characteristics. Significantly higher toxicity and lower accumulation of DMA than inorganic As(V) was shown in the As hyperaccumulators and the As-tolerant plant. Reduction of As(V) was commonly found in the plants. Arsenic complexation with thiols, which have less mobility in plants and usually occur in As-tolerant plants, was also found in rhizoids of P. cretica. Plants with greater ability to form As-thiolate have lower ability for upward transport of As. Demethylation of DMA occurred in the three plants. The DMA component decreased from the rhizoids to the fronds in both hyperaccumulators, while this tendency is reverse in B. nivea.

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“…18,19 In the case of plants, arsenate acts as an analog of phosphate, competing for the same uptake carriers in the root. 18,20,21 It has been shown 15,17,20,22 that plants have the capability to change the oxidation state of arsenic. Research focuses on xylem sap, because the plant xylem is primarily responsible for transportation of water and solutes.…”

Section: Introductionmentioning

confidence: 99%

Application of synchrotron‐radiation‐induced TXRF‐XANES for arsenic speciation in cucumber (Cucumis sativus L.) xylem sap

et al. 2007

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Synchrotron-radiation-induced total reflection x-ray fluorescence (SR-TXRF) analysis was used for x-ray absorption near edge structure (XANES) measurements for the speciation of arsenic in cucumber (Cucumis sativus L.) xylem sap. The objective of the presented work was to exploit the advantages of the TXRF geometry for XANES analysis. Measurements were accomplished at the bending magnet beamline L of HASYLAB, Hamburg, Germany, using a Si(111) double crystal monochromator and a silicon drift detector (SDD). Experiments were performed by growing cucumber plants in hydroponics containing arsenite [As(III)] or arsenate [As(V)] in order to identify the arsenic species of the collected xylem saps by K-edge SR-TXRF XANES. Cucumber xylem saps, as well as nutrient solutions containing arsenic in the two above-mentioned species, were analyzed and compared with arsenate and arsenite standard solutions. Arsenic speciation in xylem sap down to 30 ng/ml (30 ppb) was achieved, and no alteration of the oxidation state was observed during the measurements. Analysis of xylem saps showed that As(V) taken up from the nutrient solution was reduced to As(III). As(III) contained in the nutrient solutions was found to be partially oxidized to As(V). These results confirmed the preliminary measurements obtained with flow injection analysis (FIA) and high-performance liquid chromatography-high resolution inductively coupled plasma mass spectrometry (HPLC-HR-ICP-MS) and showed the competitive capability of SR-TXRF XANES analysis for this application.

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Arsenic speciation and transport in Pteris vittata L. and the effects on phosphorus in the xylem sap

Cited by 71 publications

References 25 publications

Arsenic phytoextraction and hyperaccumulation by fern species

Arsenic phytoextraction and hyperaccumulation by fern species

Difference of Toxicity and Accumulation of Methylated and Inorganic Arsenic in Arsenic-Hyperaccumulating and -Hypertolerant Plants

Application of synchrotron‐radiation‐induced TXRF‐XANES for arsenic speciation in cucumber (Cucumis sativus L.) xylem sap

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