Does cadmium play a physiological role in the hyperaccumulator Thlaspi caerulescens?

Liu, Meiqing; Yanai, Junta; Jiang, Rongfeng; Zhang, Fusuo; McGrath, Steve P.; Zhao, Fang‐Jie

doi:10.1016/j.chemosphere.2007.11.063

Cited by 86 publications

(35 citation statements)

References 34 publications

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“…4). Cadmium exposure to T. caerulescens led to consistent increase of CA activity despite the Cd-initiated decrease of Zn in the shoots (Liu et al, 2008). Whether Cd enhanced CA activity or led to expression of a Cd-CA remains unclear.…”

Section: Discussionmentioning

confidence: 99%

Effects of nanomolar copper on water plants—Comparison of biochemical and biophysical mechanisms of deficiency and sublethal toxicity under environmentally relevant conditions

et al. 2013

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Section: Discussionmentioning

confidence: 99%

Effects of nanomolar copper on water plants—Comparison of biochemical and biophysical mechanisms of deficiency and sublethal toxicity under environmentally relevant conditions

et al. 2013

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“…Root uptake of divalent cations typically exhibits two phases: apoplastic binding and symplastic uptake [3][4][5][6][7][8]. During development the concentrations of Cd fell [7], chiefly in the shell and in the kernels.…”

Section: Discussionmentioning

confidence: 99%

“…Zinc may become toxic just like cadmium, when present at concentration higher than those required for optimal growth [2][3][4]. Recent studies have revealed the presence of a Cd-requiring carbonic anhydrase enzyme [5] and its potential role in the growth and oxidative metabolism of plants [6]. Accumulation of Zn and Cd depends on the climate conditions of different plant species because the thermal effect facilitates the process of phyto extraction [7,8].…”

Section: Introductionmentioning

confidence: 99%

The Dynamics and Correlation of Cd and Zn Accumulation in Leaves and Fruit Parts of Almond (Prunus amygdalis) Cultivar Ferragnes

Vrsaljko

2015

APAR

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The dynamics of Cd and Zn accumulation in leaves and fruit parts (the kernel, the shell and the hull) of almond cv. Ferragnes was studied during vegetation in environmental conditions of Ravni kotari (inland coastal Croatia). A mild decrease in the concentration of Cd was observed during vegetation in leaves and fruits (hull), while this decrease was more pronounced in the shell and the kernels. Strong positive correlation was established between Cd accumulation in the kernels and the hull (r 2013 = 0.884; r 2014 =0.967), and intermediate correlation was found between Cd accumulation in the kernels and the hull. There was virtually no correlation between Cd accumulation in various parts of the fruit and leaves, which indicates an independent manner of Cd uptake in fruits and leaves. In the phenol phase of intensive growth of almond fruit the Zn concentration was the highest in the kernels (73 ± 1.9 mg kg -1 d. wt.), followed by a rapid decrease, while continual increase was observed in the leaves, the hull and the shell. Furthermore, low negative correlation was established between the Cd and Zn concentrations in the kernels compared to the leaf, the hull and the shell. In contrast to the kernel, there is a positive correlation between the leaves and the hull (r 2013 = 0.736; r 2014 =0.811), and between the shell and the hull. Poor negative correlations were established between Cd and Zn concentrations in the leaves, the hull and the shell pointing to an independent manner of uptake of these two elements. A significant strong correlation between Cd and Zn concentrations (r 2013 = 0.465; r 2014 = 0.933) was established only in the kernels, due to a probable re-translocation of Zn to other parts of the fruit, and a cessation of Cd accumulation.

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“…The increase in leaf biomass of the 100Cd plants was much more pronounced, as is typical in hormesis, where low levels of intoxicants can stimulate plant growth, most probably in order to dilute the intoxicants in tissues, and high levels cause intoxication, and so have negative effects on biomass production. Similarly, in Cd hyperaccumulating N. caerulescens, Cd supplementation enhanced leaf biomass (Pongrac et al 2009) and stimulated the activities of some enzymes, such as carbonic anhydrase (Liu et al 2008). This suggests that Cd stimulates the growth of the Cd-hyperaccumulating Noccaea ecotypes, however, the exact mechanism remains unknown.…”

Section: Growth Responses and Concentrations Of Chlorophylls And Anthmentioning

confidence: 99%

Influence of CdCl2 and CdSO4 supplementation on Cd distribution and ligand environment in leaves of the Cd hyperaccumulator Noccaea (Thlaspi) praecox

et al. 2013

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Background and aims The aim was to investigate whether different Cd salts in the nutrient solution of the Cd/Zn hyperaccumulator Noccaea (Thlaspi) praecox alter leaf Cd distribution and Cd ligand environment, and plant fitness. Methods Plants were grown for 8 weeks with 100/300 μM CdCl 2 or CdSO 4 . Leaf biomass, and total chlorophyll, anthocyanin, Cd, Cl, S and P concentrations were monitored. Cd localisation and ligand environment in leaves were analysed using quantitative synchrotron-based micro-X-ray fluorescence imaging, and Cd K-edge X-ray absorption fine structure and Cd L 3 -edge micro-X-ray absorption near-edge structure measurements.Results Cd uptake and plant fitness were comparable for CdCl 2 and CdSO 4 treatments, and depended on applied Cd concentration. In all treatments, Cd preferentially accumulated with high concentrations of Cl in vacuoles of large vacuolarised epidermal cells, bound mainly to oxygen-based (O)-ligands. In the mesophyll of CdCl 2 − treated plants, Cd was preferentially sequestered in vacuoles, while for CdSO 4 , Cd accumulated preferentially in the apoplast. In the symplast, Oligands increased with increasing Cd concentrations; in the apoplast, sulphur-based (S)-ligands prevailed. Conclusions Cd partitioning between leaf mesophyll apoplast and symplast and the Cd ligand environment in N. praecox depend on the Cd salt type and concentration added to the nutrient solution.Keywords Anions . Cadmium salts . Synchrotron μ-X-ray fluorescence . Cd K-edge X-ray absorption fine structure . Cd L 3 -edge μ-X-ray absorption near-edge structure

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Does cadmium play a physiological role in the hyperaccumulator Thlaspi caerulescens?

Cited by 86 publications

References 34 publications

Effects of nanomolar copper on water plants—Comparison of biochemical and biophysical mechanisms of deficiency and sublethal toxicity under environmentally relevant conditions

Effects of nanomolar copper on water plants—Comparison of biochemical and biophysical mechanisms of deficiency and sublethal toxicity under environmentally relevant conditions

The Dynamics and Correlation of Cd and Zn Accumulation in Leaves and Fruit Parts of Almond (Prunus amygdalis) Cultivar Ferragnes

Influence of CdCl2 and CdSO4 supplementation on Cd distribution and ligand environment in leaves of the Cd hyperaccumulator Noccaea (Thlaspi) praecox

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