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Sedum alfredii- A promising Zinc hyperaccumulator: Character, mechanism and application
Gao Jun 1,Feng Ying 1,Zhang Min 1 #,Lu Ling-Li 1,Li Tingqiang 2,He Zhenli 1,Yang Xiaoe 2 *
1.Ministry of Education Key Laboratory of Environment Remediation and Ecosystem Health, College of Environmental and Resources Science, Zhejiang University, Zijingang Campus, Hangzhou 310058, China
2.1Ministry of Education Key Laboratory of Environment Remediation and Ecosystem Health, College of Environmental and Resources Science, Zhejiang University, Zijingang Campus, Hangzhou 310058, China
*Correspondence author
#Submitted by
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Funding: （No.2013FZA6005）
Opened online: 2 January 2014
Accepted by: none
Citation: Gao Jun,Feng Ying,Zhang Min.Sedum alfredii- A promising Zinc hyperaccumulator: Character, mechanism and application[OL]. [ 2 January 2014] http://en.paper.edu.cn/en_releasepaper/content/4578718
 
 
Backgroud :Previous research on Zinc (Zn) hyperaccumulation was mainly focused on Noccaeacaerulescens and Arabidopsis halleri. Information on other Zn hyperaccumulators, especially non-Brassicaceae, is essential to better understand Zn hyperaccumulation mechanisms and their application potential for soil remediation.. Scope: Sedum alfredii is a Crassulaceae Zn hyperaccumulator. In this paper, the hyperaccumulation and tolerance ability of sedum plants and Sedum alfredii populations were compared. The major mechanisms of Zn hyperaccumulation in S. alfredii were discussed with respect torhizosphere process, transport mechanisms, accumulation, and detoxification, as well as molecular basis. Finally, phytoextraction of Zn by S. alfredii and the feasible post-harvest treatments of shoot biomass were reviewed. Conclusion: Zinc hyperaccumulation in S. alfredii is not a species constitutive trait. Hyperaccumulating ecotype (HE) S. alfredii possesses a root foraging mechanism and an altered Zn transport system to increase root uptake and subsequent translocation to shoot. A complex interaction of microbes, plant, and environment occurs in the rhizosphere that facilitate Zn hyperaccumulation. The accumulated Zn is mainly sequestered into inactive sites. Compared with N. caerulescens and A. halleri, S. alfredi inot only provide valuable information on metal hyperaccumulation, but holds a greater promise for application in phytoextraction at a large field scale .
Keywords:Sedum alferdii Hance; Zinc; Phytoremediation;Soil pollution; Plant-microbe interaction
 
 
 

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