Uptake and Distribution of Stable Strontium in 26 Cultivars of Three Crop Species: Oats, Wheat, and Barley for Their Potential Use in Phytoremediation

Abstract

The main objective of this study was to investigate the accumulation and distribution of strontium (Sr) in 26 cultivars of wheat (Triticum aestivum L.), husk oat (Avena sativa L) and naked oat (Avena nuda), and barley (Hordeum vulgare L.) for their potential use in phytoremediation.Sr levels had no effect on the accumulation of shoot biomass at tillering or at maturity. Mean shoot Sr concentration of naked oat and barley at tillering was significantly (P < 0.05) higher than that of wheat; Neimengkeyimai-1, a naked oat cultivar, had the highest Sr concentrations. At maturity, of four naked oat cultivars, Neimengkeyimai-1 had the highest Sr content at all measured Sr levels. Leaves had the highest Sr concentrations, followed by roots and straw, and then grain with the lowest. Mean enrichment coefficients from soil to shoots ranged from 0.521 to 1.343; the percentage of stable Sr removed from the soil to the shoots at harvest time was more than 1.4% after 120 days. Neimengkeyimai-1 could be used as a model for further research to find more effective cultivars; and naked oat plants could be selected for phytoremediation to clean up contaminated soil.

Keywords:

• strontium
• oat
• wheat
• barley
• crop
• phytoremediation

Acknowledgment

The authors thank Philippe Saner and Bo Burla of the University of Zurich, Youjun Li of Henan University of Science and Technology for discussions and comments on this work.

Additional information

Funding

This study was funded by Preliminary Research Project of 973 Program (2008CB417212), which was granted to Xu Jinzhang and Xiaogang Li. This study was also supported by “111” program (B07051).