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Accumulation and distribution characteristics of zinc and cadmium in the hyperaccumulator plant Sedum plumbizincicola.

Accumulation and distribution characteristics of zinc and cadmium in the hyperaccumulator plant Sedum plumbizincicola.

Bulletin of environmental contamination and toxicology (2014-05-03)

Dong Cao, Hongzheng Zhang, Yaodong Wang, Leina Zheng

ABSTRACT

Accumulation and distribution of Zn and Cd in the hyperaccumulator plant Sedum plumbizincicola were investigated in a hydroponic experiment. Mean Cd and Zn concentrations in shoots (7,010 and 18,400 mg kg(-1)) were about sevenfold and fivefold higher than those in roots (840 and 3,000 mg kg(-1)) after exposure to 100 μM CdSO4 and 600 μM ZnSO4, respectively. Cd and Zn concentrations in young leaves (4,330 and 9,820 mg kg(-1)) were about sixfold and twofold higher than those in mature leaves (636 and 2,620 mg kg(-1)), respectively. MicroPIXE analysis showed that Zn was predominantly localized in epidermal cells in both young and mature leaves, but large amounts of Zn occurred in mesophyll cells in young leaves. Leaf tissue fractionation showed that soluble and cell wall fractions were different at the two stages of leaf growth. Young and mature leaves of S. plumbizincicola also showed different accumulation and distribution characteristics for Zn and Cd.

MATERIALS

Product Number

Brand

Product Description

Sigma-Aldrich

Zinc, foil, thickness 1.0 mm, 99.99% trace metals basis

Sigma-Aldrich

Zinc, shot, <12 mm, 99.99% trace metals basis

Sigma-Aldrich

Zinc, shot, 5 mm, 99.999% trace metals basis

Zinc, foil, 1m coil, thickness 0.075mm, as rolled, 99.95+%

Zinc, wire reel, 1m, diameter 1.0mm, 99.99+%

Sigma-Aldrich

Zinc, puriss. p.a., ACS reagent, reag. ISO, reag. Ph. Eur., ≥99.9%, granular

Zinc, wire reel, 100m, diameter 1.0mm, extruded, 99.9%

Zinc, foil, 1m coil, thickness 0.125mm, as rolled, 99.95+%

Zinc, foil, 1m coil, thickness 0.1mm, as rolled, 99.95+%

Zinc, foil, 10mm disks, thickness 0.25mm, as rolled, 99.99+%

Zinc, foil, 15mm disks, thickness 0.005mm, 99.9%

Zinc, foil, 10mm disks, thickness 0.02mm, 99.9%

Zinc, foil, 0.5m coil, thickness 0.05mm, as rolled, 99.95+%

Zinc, foil, 10mm disks, thickness 1.0mm, as rolled, 99.95+%

Zinc, foil, 10mm disks, thickness 0.0025mm, 99.9%

Zinc, foil, 25mm disks, thickness 0.125mm, as rolled, 99.99+%

Zinc, foil, 10mm disks, thickness 0.125mm, as rolled, 99.95+%

Zinc, foil, 0.5m coil, thickness 0.20mm, as rolled, 99.95+%

Zinc, foil, 15mm disks, thickness 0.25mm, as rolled, 99.95+%

Zinc, foil, 10mm disks, thickness 0.15mm, as rolled, 99.95+%

Zinc, foil, 25mm disks, thickness 0.05mm, as rolled, 99.95+%

Zinc, foil, 15mm disks, thickness 0.25mm, as rolled, 99.99+%

Zinc, foil, 0.5m coil, thickness 2.0mm, as rolled, 99.95+%

Zinc, foil, 0.3m coil, thickness 0.175mm, as rolled, 99.95+%

Zinc, foil, 25mm disks, thickness 0.05mm, as rolled, 99.99+%

Zinc, foil, 15mm disks, thickness 0.5mm, as rolled, 99.95+%

Zinc, foil, 10mm disks, thickness 0.025mm, as rolled, 99.95+%

Zinc, foil, 15mm disks, thickness 0.0025mm, 99.9%

Zinc, foil, 15mm disks, thickness 0.05mm, as rolled, 99.99+%

Zinc, foil, 1m coil, thickness 0.175mm, as rolled, 99.95+%