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Effects of root anatomy and Fe plaque on arsenic uptake by rice seedlings grown in solution culture.

Content Provider	World Health Organization (WHO)-Global Index Medicus
Author	Deng, Dan Wu, Sheng-Chun Wu, Fu-Yong Deng, Hong Wong, Ming-Hung
Description	Author Affiliation: Deng D ( Department of Environmental Sciences, East China Normal University, Shanghai, PR China.)
Abstract	Hydroponic experiments were carried out to investigate the effects of root anatomy, induced by aeration and stagnation, and Fe plaque on arsenic (III&V) uptake and translocation by rice plants. The results showed that As uptake in rice plants (Gui Chao-2) treated by aeration was decreased due to lower root specific surface area. Rice roots with larger specific surface area tended to form more Fe plaque, and Fe plaque affected As uptake kinetics by changing As influx curves from linear to hyperbolic for As(III) and from hyperbolic to S-curve for As(V). Fe plaque increased As(III&V) adsorption and minimized the effects of root anatomy characteristics on As uptake into roots and subsequently translocation to shoots. Fe plaque increased As(III) uptake rate at As(III) concentrations of 0.5 to approximately 8 mg L(-1), reduced As(V) uptake rate at low As(V) concentrations (<2 mg L(-1)), but increased As uptake rate at high As(V) concentrations (>6 mg L(-1)).
File Format	HTM / HTML
ISSN	02697491
Issue Number	8
Volume Number	158
e-ISSN	18736424
Journal	Environmental Pollution
Language	English
Publisher	Elsevier
Publisher Date	2010-08-01
Publisher Place	Great Britain (UK)
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Discipline Environmental Discipline Science Arsenic Metabolism Iron Oryza Sativa Plant Roots Anatomy & Histology Seedling Water Pollutants, Chemical Chemistry Hydroponics Kinetics Journal Article Research Support, Non-u.s. Gov't
Content Type	Text
Resource Type	Article
Subject	Health, Toxicology and Mutagenesis Pollution Medicine Toxicology

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