Arsenic uptake and transport of Pteris vittata L. as influenced by phosphate and inorganic arsenic species under sand culture

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	Arsenic uptake and transport of Pteris vittata L. as influenced by phosphate and inorganic arsenic species under sand culture
	Liao Xiao-Yong; Chen Tong-Bin; Lei Mei
	2007
关键词	Phosphates Plants (botany) Sand Transport properties
英文摘要	In order to understand the similarity or difference of inorganic As species uptake and transport related to phosphorus in Ashyperaccumulator, uptake and transport of arsenate (As(V)) and arsenite (As(III)) were studied using Pteris vittata L. under sand culture. Higher concentrations of phosphate were found to inhibit accumulation of arsenate and arsenite in the fronds of P. vittata. The reduction in As accumulation was greater in old fronds than in young fronds, and relatively weak in root and rhizome. Moderate increases, from 0.05 to 0.3 mmol/L, in phosphate reduced uptake of As(III) more than As(V), while the reverse was observed at high concentrations of phosphate (≥1.0 mmol/L). Phosphate apparently reduced As transport and the proportion of As accumulated in fronds of P. vittata when As was supplied as As(V). It may in part be due to competition between phosphorus and As(V) during transport. In contrast, phosphate had a much smaller effect on As transport when the As was supplied as As(III). Therefore, the results from present experiments indicates that a higher concentration of phosphate suppressed As accumulation and transport in P. vittata, especially in the fronds, when exposed to As(V); but the suppression of phosphate to As transport may be insignificant when P. vittata exposed to As(III) under sand culture conditions. The finding will help to understand the interaction of P and As during their uptake process in P. vittata. © 2007 The Research Centre for Eco-Environmental Sciences, Chinese Academy of Sciences.
出处	Journal of Environmental Sciences
卷	19 期:6 页:714-718
收录类别	EI
语种	英语
内容类型	EI期刊论文
源URL	[http://ir.igsnrr.ac.cn/handle/311030/24860]
专题	地理科学与资源研究所_历年回溯文献
推荐引用方式 GB/T 7714	Liao Xiao-Yong,Chen Tong-Bin,Lei Mei. Arsenic uptake and transport of Pteris vittata L. as influenced by phosphate and inorganic arsenic species under sand culture. 2007.