Phytoextraction by arsenic hyperaccumulator Pteris vittata L. from six arsenic-contaminated soils: Repeated harvests and arsenic redistribution

Gonzaga, Maria Isidória Silva; Santos, Jorge Antônio Gonzaga; Lena, Q.

doi:10.1016/j.envpol.2007.10.011

Cited by 92 publications

(41 citation statements)

References 18 publications

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“…Arsenic concentration in natural soil is around 1-20 mg kg −1 . Higher concentrations can indicate contamination from agricultural compounds such as pesticides, fertilizers, insecticides, herbicides, or wood preservatives (Gonzaga et al 2008;Lee et al 2008).…”

Section: Introductionmentioning

confidence: 99%

Availability and Accumulation of Arsenic in Oilseeds Grown in Contaminated Soils

Melo

Guilherme

Nascimento

et al. 2011

Water Air Soil Pollut

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Arsenic occurs in the earth's crust in various chemical forms as a result of both natural and anthropogenic sources. Soil chemical extractions may help understand As availability, as well as the possibility of As entry into the food chain. Phytoextraction has been proposed as a technology for remediation of As-contaminated soils. The study was carried out to assess the bioavailability of As by extractants and to compare the performance of castor bean and sunflower for As removal from soils. Two soils were contaminated with Na 2 HAsO 4 .7H 2 O adding 35 and 150 mg As dm −3 soil. Arsenic availability was assessed using the following extractants: tri-distilled water, ammonium sulfate, ammonium phosphate, ammonium oxalate+oxalic acid, organic acids mixture, Mehlich-1, and United States Environmental Protection Agency 3051. The roots and shoots of 35-day-old plants were collected and dry matter yield as well asAs concentration were determined. The accumulation of As in shoot was also calculated in order to evaluate the plants potential for As phytoextraction. The extractants tested were efficient to assess the concentration of available As in soil. Addition of As to the soils did not cause severe toxicity in plants, although the dose 150 mg As dm −3 soil decreased shoot and root yield in both species. Castor bean was less sensitive to As than sunflower, but none of the species had hyperaccumulation characteristics. These species can be used for revegetation of areas contaminated with As up to safe limit of 150 mg As dm −3 soil, as proposed by CONAMA for industrial areas in Brazil.

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Section: Introductionmentioning

confidence: 99%

Availability and Accumulation of Arsenic in Oilseeds Grown in Contaminated Soils

Melo

Guilherme

Nascimento

et al. 2011

Water Air Soil Pollut

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“…Given its unique ability to tolerate and hyperaccumulate high levels of arsenic, P. vittata is an excellent system for studying the mechanisms responsible for arsenic metabolism, toxicity, and resistance in a multicellular organism and thus offers potential benefits for both medicine and the remediation of arsenic-contaminated soils (Kertulis-Tartar et al, 2006;Gonzaga et al, 2008;Shelmerdine et al, 2009).…”

Section: Introductionmentioning

confidence: 99%

A Vacuolar Arsenite Transporter Necessary for Arsenic Tolerance in the Arsenic Hyperaccumulating Fern Pteris vittata Is Missing in Flowering Plants

et al. 2010

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The fern Pteris vittata tolerates and hyperaccumulates exceptionally high levels of the toxic metalloid arsenic, and this trait appears unique to the Pteridaceae. Once taken up by the root, arsenate is reduced to arsenite as it is transported to the lamina of the frond, where it is stored in cells as free arsenite. Here, we describe the isolation and characterization of two P. vittata genes, ACR3 and ACR3;1, which encode proteins similar to the ACR3 arsenite effluxer of yeast. Pv ACR3 is able to rescue the arsenic-sensitive phenotypes of yeast deficient for ACR3. ACR3 transcripts are upregulated by arsenic in sporophyte roots and gametophytes, tissues that directly contact soil, whereas ACR3;1 expression is unaffected by arsenic. Knocking down the expression of ACR3, but not ACR3;1, in the gametophyte results in an arsenite-sensitive phenotype, indicating that ACR3 plays a necessary role in arsenic tolerance in the gametophyte. We show that ACR3 localizes to the vacuolar membrane in gametophytes, indicating that it likely effluxes arsenite into the vacuole for sequestration. Whereas single-copy ACR3 genes are present in moss, lycophytes, other ferns, and gymnosperms, none are present in angiosperms. The duplication of ACR3 in P. vittata and the loss of ACR3 in angiosperms may explain arsenic tolerance in this unusual group of ferns while precluding the same trait in angiosperms.

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“…A similar but not significant pattern was also observed for As TF. Arsenic TFs were higher than those of the other elements and several times above unity, verifying the well-known ability of P. vittata to behave as an As hyper-accumulating plant [40]. Table 3.…”

Section: Effectmentioning

confidence: 71%

Efficacy of EDTA and Olive Mill Wastewater to Enhance As, Pb, and Zn Phytoextraction by Pteris vittata L. from a Soil Heavily Polluted by Mining Activities

et al. 2018

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A pot experiment was conducted to evaluate the effect of Na 2 -EDTA 0.01 M (E) and olive mill wastewater 15% (OMW) on As, Pb, and Zn uptake by Pteris vittata L. grown in a soil highly contaminated by mining activities. A two-factor experimental design was followed; 3 treatments (E, OMW, and E + OMW) × 2 batches (single or double dose). Six weeks after the P. vittata transplanting, all pots received the selected dose of each treatment (Batch I). At 8 weeks, in half of the pots, a second dose of the same treatments was added (Batch II). Plants were harvested after 10 weeks and As, Pb, and Zn concentrations were determined in fronds and roots. Depending on the element, both treatment and batch effects were significant. In Batch II, EDTA application resulted in a 55% increase of As and 9-and 4-fold of Pb and Zn concentrations in the fronds, while OMW treatment substantially reinforced plant uptake when combined with EDTA. Roots to fronds translocation of the metal(loid)s highly increased in Batch II. After harvest, composite soil samples of all treatment-batch combinations were subjected to sequential extraction, but no significant differentiations of As, Pb, and Zn partitioning in soil phases were detected.

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Phytoextraction by arsenic hyperaccumulator Pteris vittata L. from six arsenic-contaminated soils: Repeated harvests and arsenic redistribution

Cited by 92 publications

References 18 publications

Availability and Accumulation of Arsenic in Oilseeds Grown in Contaminated Soils

Availability and Accumulation of Arsenic in Oilseeds Grown in Contaminated Soils

A Vacuolar Arsenite Transporter Necessary for Arsenic Tolerance in the Arsenic Hyperaccumulating Fern Pteris vittata Is Missing in Flowering Plants

Efficacy of EDTA and Olive Mill Wastewater to Enhance As, Pb, and Zn Phytoextraction by Pteris vittata L. from a Soil Heavily Polluted by Mining Activities

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