Effects of root anatomy and Fe plaque on arsenic uptake by rice seedlings grown in solution culture
| Autor: | Sheng Chun Wu, Ming Hung Wong, Dan Deng, Hong Deng, Fu Yong Wu |
|---|---|
| Rok vydání: | 2010 |
| Předmět: |
Iron
Health Toxicology and Mutagenesis chemistry.chemical_element Toxicology Plant Roots Arsenic Hydroponics Specific surface area Poaceae Oryza sativa biology food and beverages Oryza General Medicine Anatomy biology.organism_classification Pollution Kinetics chemistry Seedlings Seedling Shoot Aeration Water Pollutants Chemical |
| Zdroj: | Environmental Pollution. 158:2589-2595 |
| ISSN: | 0269-7491 |
| DOI: | 10.1016/j.envpol.2010.05.015 |
| Popis: | Hydroponic experiments were carried out to investigate the effects of root anatomy, induced by aeration and stagnation, and Fe plaque on arsenic (IIIV) 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(IIIV) 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)). |
| Databáze: | OpenAIRE |
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