Journal of Food, Agriculture and Environment
Vol 12,
Issue 2,2014
Online ISSN: 1459-0263
Print ISSN: 1459-0255
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Zinc detoxification and tolerance in alfalfa
Author(s):
Hui-Ping Dai,
Hua Zhao *, San-Qiao Wu, Hai JiangRecieved Date: 2014-01-30, Accepted Date: 2014-04-04
Abstract:After 10-week cultivation, the plants were treated with five ZnSO4·7 H2O concentrations of 0 (control), 300, 600, and 900 µM for 23 days. In this study, the effect of zinc (Zn) on growth and contents of glutathione (GSH) and phytochelatins (PCs) were investigated in roots, stem and leaves of alfalfa. The accumulation of Zn increased with external Zn concentrations, and was considerably higher in roots than in stem and leaves. In stem, exposure to Zn caused an appreciable decline in GSH contents and an increase in PCs synthesis proportional to Zn concentrations in the growth medium. At 900 µM concentration, PCs production was higher in roots than in stem and leaves. Taken together, the majority of Zn accumulated by alfalfa roots was in the form of a Zn-PCs complex.
Keywords:Tolerance,
detoxification, zinc, glutathione, phytochelatinsJournal: Journal of Food, Agriculture and Environment
Year: 2014
Volume: 12
Issue: 2
Category: Environment
Pages: 1097-1099
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