Cd speciation and biouptake-Effect of ligand type and Na competition

摘要：

Hydroponically grown durum wheat (Triticum turgidum L. var. durum, cv Napoleon) was used as model organism to study Cd accumulation under various experimental conditions. Potential of Na as competitive cation for Cd<2+> was explored at three different Na<,+> concentrations. Root Cd accumulation was reduced (P<0. 05) in plants exposed to CA and Na at Cd<2+>: Na<+>= 1:1 in both chloride and acetate buffered exposures. While chloro-complexation of Cd significantly (P<0. 05) enhanced root Cd in complete absence of Na. Root Cd accumulation was enhanced (P<0. 05) in plants exposed to Cd-acetate in presence of excess Na (~30 mmol/l of Na). Results reveal striking contrast in mechanism of counter ion activity in enhancing Cd uptake in presence of a competitive cation Na<+>.

关键词： durum wheat cadmium chloride acetate sodium competition

作者: K. S. Dave B. A. Hale

作者单位: Department of Land Resource Science, University of Guelph, Guelph, NlG 2Wl, Ontario, Canada

会议类型: 国际会议

会议名称: 第九届痕量元素生物地球化学国际会议(9th International Conference on the Biogeochemistry of Trace Elements)

会议地点: 北京

会议语种:英文

页码: 596-597

在线出版日期: 2007-07-15（万方平台首次上网日期，不代表论文的发表时间）