Complexation with dissolved organic matter and mobility control of heavy metals in the rhizosphere of hyperaccumulator Sedum alfredii

Li, Tingqiang; Qi, Tao; Liang, Chengfeng; Shohag, M. J. I.; Yang, Xiaoe; Sparks, Donald L.

doi:10.1016/j.envpol.2013.07.025

Cited by 118 publications

(18 citation statements)

References 44 publications

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“…Dissolved organic-matter is known to complex with Pb and Ni and the process has been implicated in decreasing the sorption and increasing their mobility (Li et al, 2013;Lockwood et al, 2015). Parallel development of soluble Ni, Pb and DOC in our experiment (Fig.…”

Section: Ni and Pb (Im)mobilization Under Dynamic Redox Conditionsmentioning

confidence: 78%

Biogeochemistry of Ni and Pb in a periodically flooded arable soil: Fractionation and redox-induced (im)mobilization

Antić-Mladenović

Frohne

Kresovic

et al. 2017

Journal of Environmental Management

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Section: Ni and Pb (Im)mobilization Under Dynamic Redox Conditionsmentioning

confidence: 78%

Biogeochemistry of Ni and Pb in a periodically flooded arable soil: Fractionation and redox-induced (im)mobilization

Antić-Mladenović

Frohne

Kresovic

et al. 2017

Journal of Environmental Management

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“…In previous studies [5], [9], [10], S. alfredii was found to show heavy metal resistance and accumulation, as well as the ability to efficiently transport heavy metals from the root to the shoot. Roots of S. alfredii mainly produce malic acid, oxalic acid, and tartaric acid, presumably contributing to enhanced bioavailability of heavy metals [11].…”

Section: Introductionmentioning

confidence: 99%

The Endophytic Bacterium, Sphingomonas SaMR12, Improves the Potential for Zinc Phytoremediation by Its Host, Sedum alfredii

Bao

Jianguo²,

Zhang

et al. 2014

PLoS ONE

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The endophytic bacterium, Sphingomonas SaMR12, isolated from Sedum alfredii Hance, appears to increase plant biomass and zinc-extraction from contaminated soil; however, the mechanism by which this occurs is not clear. Here, the ability of SaMR12 to promote zinc extraction and its effects on root morphology and exudation were examined in hydroponics. Zinc treatment increased shoot biomass by 30 to 45%, and by a further 10 to 19% when combined with SaMR12 inoculation. Zinc treatment also increased zinc accumulation modestly and this too was enhanced with SaMR12. Both biomass and zinc levels increased in a dose-dependent manner with significant effects seen at 50 µM zinc and apparent saturation at 500 µM. Zinc and the endophyte also increased levels of auxin but not at 50 µM and zinc increased levels of superoxide and hydrogen peroxide but mainly at 500 µM. As for root morphology, SaMR12 increased root branching, the number of root tips, and surface area. Zinc and SaMR12 also increased the exudation of oxalic acid. For most assays the effects of the endophyte and zinc were additive, with the notable exception of SaMR12 strongly reducing the production of reactive oxygen species at 500 µM zinc. Taken together, these results suggest that the promotion of growth and zinc uptake by exposure to zinc and to SaMR12 are independent of reactive oxygen and do not involve increases in auxin.

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“…Os principais sítios de complexação são os grupamentos carboxílicos e fenólicos (Li et al, 2013;Jalali & Latifi, 2017). A elevação do pH a valores acima de 6,0 reduzem a disponibilidade de Zn, Cu e Mn.…”

Section: Resultsunclassified

Micronutrientes catiônicos: fontes, doses e ambientes

Lana

Silva

Nicchio

et al. 2017

Agraria

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Complexation with dissolved organic matter and mobility control of heavy metals in the rhizosphere of hyperaccumulator Sedum alfredii

Cited by 118 publications

References 44 publications

Biogeochemistry of Ni and Pb in a periodically flooded arable soil: Fractionation and redox-induced (im)mobilization

Biogeochemistry of Ni and Pb in a periodically flooded arable soil: Fractionation and redox-induced (im)mobilization

The Endophytic Bacterium, Sphingomonas SaMR12, Improves the Potential for Zinc Phytoremediation by Its Host, Sedum alfredii

Micronutrientes catiônicos: fontes, doses e ambientes

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