Phosphate and arsenate uptake by barley from soil is not explained by simple competition for a common transporter
We have investigated the barley growth response to arsenic in soil at two phosphate (P) levels and 5 arsenate (As) levels. In hydroponic studies P has been shown to have a protective effect in regards to As toxicity, due to phosphate reducing the arsenate uptake. We found a protective effect on growth that was significant at As levels lower than 15ppm. However, there was severe growth inhibition at all levels of As. In addition, our results show that there was no significant difference between As accumulation in shoot and root at high and low P levels below 20 ppm As. This was also the case for root and shoot As concentrations. So our results show that the P protective effect is in fact not due to a reduced uptake of arsenate when P supply to barley grown in soil was increased.
Arsenic barley phosphate soil
H. M. Christophersen E. Facelli F. A. Smith S. E. Smith
Soil and Land Systems, School of Environmental Sciences, Wake Campus, The University of Adelaide, South Australia 5005, Australia
国际会议
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)
北京
英文
824-825
2007-07-15（万方平台首次上网日期，不代表论文的发表时间）