Subcellular distribution and chemical forms of cadmium in Phytolacca americana L

Phytolacca americana L. (pokeweed) is a promising species for Cd phytoextraction with large biomass and fast growth rate. To further understand the mechanisms involved in Cd tolerance and detoxification, the present study investigated subcellular distribution and chemical forms of Cd in pokeweed. Su...

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Bibliographic Details
Published in:Journal of hazardous materials 2011-02, Vol.186 (1), p.103-107
Main Authors: Fu, Xiaoping, Dou, Changming, Chen, Yingxu, Chen, Xincai, Shi, Jiyan, Yu, Mingge, Xu, Jie
Format: Article
Language:English
Subjects:
Applied sciences
Cadmium
Cadmium - chemistry
Cadmium - metabolism
Cadmium tolerance
Chemical form
Ethanol
Ethyl alcohol
Exact sciences and technology
Fractionation
Hyperaccumulator plant
Leaves
Phytolacca americana
Phytolacca americana - metabolism
Pokeweed
Pollution
Quality Control
Roots
Subcellular distribution
Subcellular Fractions - metabolism
Tolerances
Walls
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Summary:Phytolacca americana L. (pokeweed) is a promising species for Cd phytoextraction with large biomass and fast growth rate. To further understand the mechanisms involved in Cd tolerance and detoxification, the present study investigated subcellular distribution and chemical forms of Cd in pokeweed. Subcellular fractionation of Cd-containing tissues indicated that both in root and leaves, the majority of the element was located in soluble fraction and cell walls. Meanwhile, Cd taken up by pokeweed existed in different chemical forms. Results showed that the greatest amount of Cd was found in the extraction of 80% ethanol in roots, followed by 1M NaCl, d-H2O and 2% HAc, while in leaves and stems, most of the Cd was extracted by 1M NaCl, and the subdominant amount of Cd was extracted by 80% ethanol. It could be suggested that Cd compartmentation with organo-ligands in vacuole or integrated with pectates and proteins in cell wall might be responsible for the adaptation of pokeweed to Cd stress.
ISSN:0304-3894
1873-3336
DOI:10.1016/j.jhazmat.2010.10.122