Greatly enhanced arsenic shoot assimilation in rice leads to elevated grain export: comparison with wheat and barley

摘要：

The grains, shoot and soils of 173 commercially farmed grain crops (temperate rice, wheat and barley) were surveyed to investigate variation in the assimilation and translocation of As. Rice samples were obtained from the Camargue (France), Donana (Spain), Cadiz (Spain), California (USA), and Arkansas (USA). Wheat and barley were collected from Cornwall and Devon (England) and the east coast of Scotland. Transfer of As from soil to grain was an order of magnitude greater in rice than in wheat or barley despite lower rates of shoot to grain transfer. Grain As levels over 0. 60μg·g<-1> dry wt, comparable to the levels found in As contaminated districts of Bangladesh, were found in rice grown in paddy soil of around 10/μg·g<-1>. Some agricultural soils in the southwest of England had levels in excess of 200μg·g<-1> dry wt. However, the grain levels in wheat and barley never breached 0.55μg·g<-1>, suggesting very different As soil thresholds should be set for aerobic and anaerobic agrosystems.

关键词： Arsenic rice transfer wheat barley

作者: P. N. Williams A. Villada A. Raab E. E. Adomako J. Figuerola A. J. Green J. Feldrnann A. A. Meharg

作者单位: School of Biological Sciences, University of Aberdeen, Aberdeen AB24 3UU, UK Department of Chemistry, University of Aberdeen, Aberdeen AB24 3UE, UK Estacion Biologica de Donana, Sevilla, 41013, Spain

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: 887-888

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）