Role of transpiration in arsenic accumulation of hyperaccumulator Pteris vittata L.

Wan, Xiaoming; Lei, Mei; Chen, Tongbin; Yang, Jin‐yan; Liu, Hongtao; Chen, Yang

doi:10.1007/s11356-015-4746-6

Cited by 48 publications

(17 citation statements)

References 42 publications

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“…It should be noted that plant transpiration is limited for plant culture in agar media, while the role of transpiration in hyperaccumulation has been demonstrated (e.g. for arsenic accumulation in Pteris vittata L. (ladder brake)). Hence, confirmation of the hyperaccumulation status of the plants studied in the present work in field trials may still be of value.…”

Section: Resultsmentioning

confidence: 99%

Accumulation and toxicity of lanthanum and neodymium in horticultural plants (Brassica chinensis L. and Helianthus annuus L.)

2018

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The dose‐response of two horticultural plant species (Brassica chinensis L., and Helianthus annuus L.) to two light Rare Earth Elements (REEs), namely lanthanum and neodymium, in‐vitro, was investigated. The phytotoxicity of the studied REEs was determined by measuring the aboveground and belowground biomass of the plant parts, and the chlorophyll production. Based on these measurements, inhibition concentration causing 50 % decrease (IC50) in plant biomass and total chlorophyll were calculated. Moreover, the available ionic species of La and Nd in the media for plant uptake were predicted using Visual MINTEQ. The concentration of these elements were measured in different plant tissues to assay the ability of these plants to hyperaccumulate La and Nd. It was observed that La and Nd, at lower dosages (<∼100 mg/kg), had hormetic effects, respectively, on the shoot and root of H. annuus L. Also, Nd had stimulatory effects on the number of leaves and chlorophyll content of B. chinensis L. However, these two elements were toxic to both plants at higher media concentrations. Between the two plant species, H. annuus L. was more resistant to the studied REEs when compared to B. chinensis L. IC50 values of La for the roots and shoots of both plant species (139–201 mg/kg) were markedly smaller when compared to IC50 values of Nd (222–333 mg/kg). Thus, between the two assayed elements, La was more toxic to the plants. Translocation factors for La and Nd were not high enough to consider the plant species as hyperaccumulators.

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Section: Resultsmentioning

confidence: 99%

Accumulation and toxicity of lanthanum and neodymium in horticultural plants (Brassica chinensis L. and Helianthus annuus L.)

2018

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“…SbIII and AsIII are both neutral solutes, and thus passive diffusion or other transporters may participate in the efficient uptake of AsIII and SbIII in P. vittata. An earlier study indicated that the transpiration of P. vittata greatly contributed to the uptake of AsIII (Wan et al 2015a), thereby implying the role of passive diffusion in As accumulation and its possible role in SbIII accumulation.…”

Section: Discussionmentioning

confidence: 98%

Interaction of As and Sb in the hyperaccumulator Pteris vittata L.: changes in As and Sb speciation by XANES

Wan

Lei

Chen

2016

Environ Sci Pollut Res

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Arsenic (As) and antimony (Sb) are chemical analogs that display similar characteristics in the environment. The As hyperaccumulator Pteris vittata L. is a potential AsSb co-accumulating species. However, when this plant is exposed to different As and Sb speciation, the associated accumulating mechanisms and subsequent assimilation processes of As and Sb remain unclear. A 2-week hydroponic experiment was conducted by exposing P. vittata to single AsIII, AsV, SbIII, and SbV or the co-existence of AsIII and SbIII and AsV and SbV. P. vittata could co-accumulate As and Sb in the pinna (>1000 mg kg −1 ) with high translocation (>1) of As and Sb from the root to the pinna. P. vittata displayed apparent preference to the trivalent speciation of As and Sb than to the pentavalent speciation. Under the single exposure of AsIII or SbIII, the pinna concentration of As and Sb was 84 and 765 % higher than that under the single exposure of AsV or SbV, respectively. Despite the provided As speciation, the main speciation of As in the root was AsV, whereas the main speciation of As in the pinna was AsIII. The Sb in the roots comprised SbV and SbIII when exposed to SbV but was exclusively SbIII when exposed to SbIII. The Sb in the pinna was a mixture of SbV and SbIII regardless of the provided Sb speciation. Compared with the single exposure of As, the coexistence of As and Sb increased the As concentration in the pinna of P. vittata by 50-66 %, accompanied by a significant increase in the AsIII percentage in the root. Compared with the single exposure of Sb, the co-existence of Sb and As also increased the Sb concentration in the pinna by 51-100 %, but no significant change in Sb speciation was found in P. vittata.

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“…An important role of transpiration in As translocation from root-to-shoot has been revealed in P. vittata. It was observed by Wan et al (2015) that subjecting the plants to shade to reduce transpiration by 28–67% decreased shoot As by 19–56%. They further compared ecotypes of P. vittata from moister and warmer habitat having high transpiration rate with ecotypes from drier and cooler habitat and found that ecotypes with higher transpiration also had higher As in shoot.…”

Section: Transporters For Uptake and Translocation Of Arsenicmentioning

confidence: 99%

The Journey of Arsenic from Soil to Grain in Rice

et al. 2017

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Arsenic (As) is a non-essential toxic metalloid whose elevated concentration in rice grains is a serious issue both for rice yield and quality, and for human health. The rice-As interactions, hence, have been studied extensively in past few decades. A deep understanding of factors influencing As uptake and transport from soil to grains can be helpful to tackle this issue so as to minimize grain As levels. As uptake at the root surface by rice plants depends on factors like iron plaque and radial oxygen loss. There is involvement of a number of transporters viz., phosphate transporters and aquaglyceroporins in the uptake and transport of different As species and in the movement to subcellular compartments. These processes are also affected by sulfur availability and consequently on the level of thiol (-SH)-containing As binding peptides viz., glutathione (GSH) and phytochelatins (PCs). Further, the role of phloem in As movement to the grains is also suggested. This review presents a detailed map of journey of As from soil to the grains. The implications for the utilization of available knowledge in minimizing As in rice grains are presented.

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Role of transpiration in arsenic accumulation of hyperaccumulator Pteris vittata L.

Cited by 48 publications

References 42 publications

Accumulation and toxicity of lanthanum and neodymium in horticultural plants (Brassica chinensis L. and Helianthus annuus L.)

Accumulation and toxicity of lanthanum and neodymium in horticultural plants (Brassica chinensis L. and Helianthus annuus L.)

Interaction of As and Sb in the hyperaccumulator Pteris vittata L.: changes in As and Sb speciation by XANES

The Journey of Arsenic from Soil to Grain in Rice

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