文档介绍：
Sedum alfredii- A promising Zinc umulator:
Character, mechanism and application#
Gao Jun, Feng Ying, Zhang Min, Lu Ling-Li, Li Tingqiang, He Zhenli, Yang Xiaoe**
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(Ministry of Education Key Laboratory of Environment Remediation and Ecosystem Health,
College of Environmental and Resources Science, Zhejiang University, Zijingang Campus,
Hangzhou 310058, China)
Abstract: Backgroud :Previous research on Zinc (Zn) umulation was mainly focused on
aeacaerulescens and Arabidopsis halleri. Information on other Zn umulators, especially
non-Brassicaceae, is essential to better understand Zn umulation mechanisms and their
application potential for soil remediation.. Scope: Sedum alfredii is a Crassulaceae Zn
umulator. In this paper, the umulation and tolerance ability of sedum plants and
Sedum alfredii populations pared. The major mechanisms of Zn umulation 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 umulation in S.
alfredii is not a species constitutive trait. umulating ecotype (HE) S. alfredii possesses a root
foraging mechanism and an altered Zn transport system to increase root uptake and subsequent
translocation to shoot. plex interaction of microbes, plant, and environment occurs in the
rhizosphere that facilitate Zn umulation. 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 umulation, but holds a greater promise for application in phytoextraction
at a large field scale .
Key words: Sedum alferdii Hance; Zinc; Phytoremediation;Soil pollution; Plant-microbe interaction
0 Introduction
Zinc (Zn), the only micronutrient involved in all enzymes, is precisely maintai