Distribution and speciation of chromium accumulated in Gynura pseudochina (L.) DC.

Mongkhonsin, Bodin; Nakai, Izumi; Hokura, Akiko; Jearanaikoon, Nichada

doi:10.1016/j.envexpbot.2011.04.018

Cited by 57 publications

(21 citation statements)

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“…A plant growing in a soil containing heavy metals can be considered a hyperaccumulator if it concentrates in its shoot without suffering from toxicity problems, up to 1 % of Mn or Zn, 0.1 % of As, Co, Cr, Cu, Ni, Pb, Sb, Se and Tl or 0.01 % of Cd (Verbruggen et al, 2009). Also, according to Mongkhonsin et al (2011), Reeves and Baker (2000) and Tappero et al (2007), considering a plant a hyperaccumulator of Cr is based on three criteria: that the Cr concentration in the shoot > 50 mg kg −1 , that the concentration of Cr in the aerial biomass is 10-500 times greater than in the nonmetallophytes (0.2-5 mg kg −1 of Cr), and that the Cr concentration in the shoot is greater than in the roots.…”

Section: Metal Content In the Plantsmentioning

confidence: 99%

Cobalt, chromium and nickel contents in soils and plants from a serpentinite quarry

et al. 2015

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Abstract. The former serpentinite quarry of Penas Albas (Moeche, Galicia, NW Spain) left behind a large amount of waste material scattered over the surrounding area, as well as tailing areas. In this area several soils were studied together with the vegetation growing spontaneously over them with the aim of identifying the bioavailability of heavy metals. The potential of spontaneous vegetation for phytoremediation and/or phytostabilization was evaluated. The pH of the soils ranges from neutral to basic, with very low organic matter and nitrogen contents. There are imbalances between exchangeable cations like potassium (K) and calcium (Ca), mainly due to high magnesium (Mg) content that can strongly limit plant production. Moreover, in all of the studied soils there are high levels of cobalt (Co), chromium (Cr) and nickel (Ni) ( >70, >1300 and >1300 mg kg −1 , respectively). They exceed the intervention limits indicated by soil guideline values. Different soil extractions were performed in order to evaluate bioavailability. CaCl 2 0.01 M is the most effective extraction reagent, although the reagent that best predicts plant availability is a mixture of low molecular weight organic acids. Festuca rubra, L. is the spontaneous plant growing in the soils that accumulates the highest amount of the metals, both in shoot and roots. Festuca also has the highest translocation factor values, although they are only > 1 for Cr. The bioconcentration factor is > 1 in all of the cases, except in the shoot of Juncus sp. for Co and Ni. The results indicate that Festuca is a phytostabilizer of Co and Ni and an accumulator of Cr, while Juncus sp. is suitable for phytostabilization.

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Section: Metal Content In the Plantsmentioning

confidence: 99%

Cobalt, chromium and nickel contents in soils and plants from a serpentinite quarry

et al. 2015

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“…The reduction of CrVI to CrIII was also observed in Gynura pseudochina L. treated with CrVI in hydroponics based on X-ray absorption spectroscopy (XAS). Both CrVI and CrIII must have crossed the endodermis via the symplastic system and deposited inside the roots, which was reduced to CrIII (Mongkhonsin et al, 2011). EspinozaeQuiñones et al (2009, working with tree aquatic macrophytes Salvinia auriculate, Pistia stratiotes and Eichhornia crassipes in hydroponic solution containing CrVI and CrIII, determined Cr speciation by high-resolution X-ray fluorescence emission spectroscopy.…”

Section: Crvi Was Reduced To Criii In the Roots Of P Vittatamentioning

confidence: 97%

Chromate and phosphate inhibited each other's uptake and translocation in arsenic hyperaccumulator Pteris vittata L.

Oliveira

Lessl

Gress

et al. 2015

Environmental Pollution

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“…Distribution, translocation and accumulation of Cr in G. pseudochina primarily depended on the oxidation state of Cr and on the plant tissue. 15 Studies have found that roots of Typha latifolia and T. angustifolia can accumulate Pb and Cr mainly in the epidermis. [16][17][18] Therefore, Cr in T. angustifolia of this study may perhaps still be in the upwards translocation and sequestration process because it was found mainly in the vascular bundle.…”

Section: Discussionmentioning

confidence: 99%

“…In Trifolium brachycalycium, Atriplex canescence G. pseudochina and S. alfredii, Cr(VI) is reduced to Cr(V) then further reduced to Cr(III), or Cr(VI) is directly reduced to Cr(III). 14,15,26 EtOAcHyperaccumulator plants may develop different mechanisms applicable in the phytoremediation process. In this study, T. angustifolia tolerated Cr(VI) by reducing it to Cr(III) in the rhizosphere.…”

Section: Discussionmentioning

confidence: 99%

“…19 cants in veins, S. alfredii can accumulate Zn not only in its epidermis or mesophyll but also in the center part of its leaf vein. 15 EtOAcThe efficiency of heavy metal translocation from root to shoot is affected by various processes such as symplast uptaking by root, root sequestration, xylem loading and xylem unloading, as well as heavy metals uptaking by foliar cells. Researchers have found that increased xylem loading is the main factor affecting absorption and translocation of heavy metal from root to shoot; as shown in increasing uptake of Zn and Cd by S. alfredii, Solanum melongena, and Solanum torvum.…”

Section: Discussionmentioning

confidence: 99%

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Phytoremediation of Chromium: Distribution and Speciation of Chromium in Typha angustifolia

Vidayanti

Choesin

Iriawati

2017

IJPB

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Chromium (Cr), especially in hexavalent chromium [Cr(VI)] may contaminate water or soil and cause detrimental effects, as it is potentially carcinogenic and teratogenic. Phytoremediation using plants such as Typha angustifolia provides an alternative approach for handling Cr waste. The objective of this study was to determine the mechanism of Cr accumulation in T. angustifolia. Hydroponic media containing T. angustifolia was added with 0, 1, 5, 10 and 20 ppm of Cr (VI) (K 2 Cr 2 O 7 ). After 15 days of treatment, distribution and speciation of Cr in roots and shoots of T. angustifolia were analyzed using XAS and µ-XRF. Results showed that Cr was detected in almost all parts of root and shoot at different intensities. Intensities of Cr was higher in roots (especially in the vascular bundle) than in shoot. Cr speciation in the root and shoot was found as trivalent chromium [Cr(III)] which formed as a result of Cr(VI) reduction. Based on the patterns of Cr distribution and speciation, results of this study suggest that T. angustifolia in this study does not reduce Cr(VI) to become Cr(III) inside the plants.

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Distribution and speciation of chromium accumulated in Gynura pseudochina (L.) DC.

Cited by 57 publications

References 32 publications

Cobalt, chromium and nickel contents in soils and plants from a serpentinite quarry

Cobalt, chromium and nickel contents in soils and plants from a serpentinite quarry

Chromate and phosphate inhibited each other's uptake and translocation in arsenic hyperaccumulator Pteris vittata L.

Phytoremediation of Chromium: Distribution and Speciation of Chromium in Typha angustifolia

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