Variation in cadmium accumulation and speciation within the same population of the hyperaccumulator Noccaea caerulescens grown in a moderately contaminated soil

Yan, Jiawei; Tang, Zhong; Fischel, Matthew; Wang, Peng; Siebecker, Matthew G.; Aarts, M.N.C.; Sparks, Donald L.; Zhao, Fang‐Jie

doi:10.1007/s11104-022-05373-w

Cited by 9 publications

(4 citation statements)

References 71 publications

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“…In contrast, nodes tend to retain heavy isotopes and translocate light isotopes to the grains. Studies in Cd speciation suggested that the majority of leaf Cd (61–69%) was mainly complexed with thiol compounds , and the majority of Cd in the rice phloem sap was chelated with protein and thiol compounds . Therefore, leaves prefer to store light isotopes as they combine with the sulfur atoms, while nodes are enriched in heavy Cd isotopes in the xylem-to-phloem transport via OsHMA2 and OsLCT .…”

Section: Results and Discussionmentioning

confidence: 99%

Cadmium Isotope Fractionations Induced by Foliar and Root Uptake for Rice Exposed to Atmospheric Particles: Implications for Environmental Source Tracing

Xia,

Zhou,

Zeng

et al. 2023

Environ. Sci. Technol. Lett.

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Rice roots and leaves were exposed to cadmium (Cd)-contaminated particles in a greenhouse to modify the fractionation during Cd uptake and transport in the plants by using the Bayesian mixing model. The exposure to atmospheric Cd in rice near a copper smelter was determined under the field conditions. The results showed that the leaves directly absorb and accumulate atmospheric Cd in other aboveground tissues by 84− 99%. Positive values of Δ 114/110 Cd Leaf−Particle (0.08−0.11‰), Δ 114/110 Cd Node−Leaf (0.77− 0.81‰), and Δ 114/110 Cd Grain−Leaf (0.39−0.43‰) following foliar exposure as well as Δ 114/110 Cd Root−Particle (0.19−0.22‰) and Δ 114/110 Cd Grain−Root (−0.29 to 0.34‰) following root exposure suggested that particles released heavy isotopes. The roots and leaves preferentially retained light isotopes and transported heavy isotopes upward. The Cd isotope fractionations in the plant were constant under both root and foliar exposures at two dosages. The results were used to correct the parameters in the isotope mixing models and to trace the source of atmospheric Cd in rice tissues in the field. Both models of isotope mixing and mass balance suggested 50−63% Cd deposition on the grains. This study provides a theoretical basis for tracing the source of Cd isotopes in plants.

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Section: Results and Discussionmentioning

confidence: 99%

Cadmium Isotope Fractionations Induced by Foliar and Root Uptake for Rice Exposed to Atmospheric Particles: Implications for Environmental Source Tracing

Xia,

Zhou,

Zeng

et al. 2023

Environ. Sci. Technol. Lett.

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“…Cd in root and leaf was isotopically lighter than in other parts after root or foliar exposure in the greenhouse experiment, suggesting that root and leaf retained light isotopes and transported heavy isotopes to the other tissues. Isotopically light Cd favors chelation by thiols (Cd–S) and cysteine-rich peptides in cell membranes during upward transport to shoots, , so that rice roots tend to retain Cd light isotopes due to vacuolar sequestration and strong binding to thiols in the vacuole and membranes. ,, Cadmium speciation studies also suggested that the majority of Cd in leaf (61–69%) is mainly complexed with thiol compounds, , and Cd in the rice phloem sap is chelated with protein and thiol compounds, so that leaves favor storing lighter isotopes …”

Section: Resultsmentioning

confidence: 99%

“…Isotopically light Cd favors chelation by thiols (Cd−S) and cysteine-rich peptides in cell membranes during upward transport to shoots, 24,59 so that rice roots tend to retain Cd light isotopes due to vacuolar sequestration and strong binding to thiols in the vacuole and membranes. 30,51,60 Cadmium speciation studies also suggested that the majority of Cd in leaf (61−69%) is mainly complexed with thiol compounds, 30,61 and Cd in the rice phloem sap is chelated with protein and thiol compounds, 62 so that leaves favor storing lighter isotopes. 63 Cadmium isotopes were obviously fractionated among the different rice tissues.…”

Section: Calculation Of the Contribution Of Atmospheric And Soil Sour...mentioning

confidence: 99%

Stable Isotope Ratios Trace the Rice Uptake of Cadmium from Atmospheric Deposition via Leaves and Roots

Xia,

Zhou,

Sun

et al. 2023

Environ. Sci. Technol.

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Cadmium (Cd) stable isotopes provide a novel technique to investigate the fate of Cd in the environment, but challenges exist for tracing the sources in the plants. We performed individual rice leaf and root exposures to dry and wet deposition using customized open-top chambers (OTCs) in the greenhouse and in the field next to a smelter, respectively. The field experiment also included a control without Cd deposition and a "full" treatment. The exposure experiments and isotope signatures showed that leaves can directly take up atmospheric Cd and then translocate within rice plants to other tissues, contributing 52−70% of Cd in grains, which exceeded the contribution (30−48%) by root exposure. The Cd isotopes in leaves, nodes, internodes, and grains demonstrate that roots preferentially take up Cd from wet deposition, but leaves favor uptake of Cd from dry deposition. The Cd uptake by leaves is redistributed via nodes, allowing for upward transport to the grains but preventing downward transport to the roots. Leaves favor uptake of heavy isotopes from atmospheric deposition (ΔCd 114/110 Leaf-Dust : 0.10 ± 0.02‰) but retain light isotopes and transport heavy isotopes to the nodes and further to grains. These findings highlight the contribution of atmospheric deposition to rice and Cd isotopes as a useful tracer for quantifying sources in plants when different isotopic compositions are in sources.

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“…A paper reports on the capability of the hyperaccumulator plant Noccaea caerulescens to phytoextract Cd in Cd-contaminated solids. 64 In this broad and detailed study 29 lines of N. caerulescens were employed and grown in soils contaminated from the discharge of a chemical industry, a steel plant and sewage irrigation. Plants were grown in greenhouse under controlled conditions of light and temperature.…”

Section: Cadmiummentioning

confidence: 99%

Atomic spectrometry update: review of advances in elemental speciation

Clough

Harrington

Hill

et al. 2023

J. Anal. At. Spectrom.

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Variation in cadmium accumulation and speciation within the same population of the hyperaccumulator Noccaea caerulescens grown in a moderately contaminated soil

Cited by 9 publications

References 71 publications

Cadmium Isotope Fractionations Induced by Foliar and Root Uptake for Rice Exposed to Atmospheric Particles: Implications for Environmental Source Tracing

Cadmium Isotope Fractionations Induced by Foliar and Root Uptake for Rice Exposed to Atmospheric Particles: Implications for Environmental Source Tracing

Stable Isotope Ratios Trace the Rice Uptake of Cadmium from Atmospheric Deposition via Leaves and Roots

Atomic spectrometry update: review of advances in elemental speciation

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