Arsenic accumulation by the aquatic fern Azolla: Comparison of arsenate uptake, speciation and efflux by A. caroliniana and A. filiculoides

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	Arsenic accumulation by the aquatic fern Azolla: Comparison of arsenate uptake, speciation and efflux by A. caroliniana and A. filiculoides
	Xu, Guo-Zhong; Lin, Ai-Jun; Zhao, Fang-Jie; Zhang, Xin; Zhu, Yong-Guan; Duan, Gui-Lan
刊名	ENVIRONMENTAL POLLUTION
	2008-12
卷号	156 期号:3 页码:1149-1155
关键词	Arsenic As Speciation As Tolerance As Uptake Azolla Accumulation Detoxification
英文摘要	This study investigates As accumulation and tolerance of the aquatic fern Azolla. Fifty strains of Azolla showed a large variation in As accumulation. The highest- and lowest-accumulating ferns among the 50 strains were chosen for further investigations. Azolla caroliniana accumulated two times more As than Azolla filiculoides owing to a higher influx velocity for arsenate. A. filiculoides was more resistant to external arsenate due to a lower uptake. Both strains showed a similar degree of tolerance to internal As. Arsenate and arsenite were the dominant As species in both Azolla strains, with methlyated As species accounting for <5% of the total As. A. filiculoides had a higher proportion of arsenite than A. caroliniana. Both strains effluxed more arsenate than arsenite, and the amount of As efflux was proportional to the amount of As accumulation. The potential of growing Azolla in paddy fields to reduce As transfer from soil and water to rice should be further evaluated. (C) 2008 Elsevier Ltd. All rights reserved.
WOS记录号	WOS:000261678700073
内容类型	期刊论文
源URL	[http://ir.rcees.ac.cn/handle/311016/22314]
专题	生态环境研究中心_土壤环境科学实验室
推荐引用方式 GB/T 7714	Xu, Guo-Zhong,Lin, Ai-Jun,Zhao, Fang-Jie,et al. Arsenic accumulation by the aquatic fern Azolla: Comparison of arsenate uptake, speciation and efflux by A. caroliniana and A. filiculoides[J]. ENVIRONMENTAL POLLUTION,2008,156(3):1149-1155.
APA	Xu, Guo-Zhong,Lin, Ai-Jun,Zhao, Fang-Jie,Zhang, Xin,Zhu, Yong-Guan,&Duan, Gui-Lan.(2008).Arsenic accumulation by the aquatic fern Azolla: Comparison of arsenate uptake, speciation and efflux by A. caroliniana and A. filiculoides.ENVIRONMENTAL POLLUTION,156(3),1149-1155.
MLA	Xu, Guo-Zhong,et al."Arsenic accumulation by the aquatic fern Azolla: Comparison of arsenate uptake, speciation and efflux by A. caroliniana and A. filiculoides".ENVIRONMENTAL POLLUTION 156.3(2008):1149-1155.