Abstract
Given the wide–spread consumption of wheat, the production of selenium (Se)–enriched wheat grain may be an effective method to increase the dietary Se intake in many Se–deficient areas. Herein, we biofortified wheat (Triticum aestivum L.) via the foliar spraying of selenate or selenite at low or high rate, and investigated the resulting Se distribution in different wheat parts and the crucial parts involved in grain Se accumulation. Results showed that Se concentration in grain after selenite spraying was 1.5 times higher than that of selenate. Grain Se accumulation was largely affected by leaves Se and the transfer of Se from node1 to internode1. Furthermore, the main speciation of Se in wheat grain was the organic Se. In addition, the optimal dosage was 15 g ha−1. In summary, foliar spraying 15 g ha−1 of Se is an effective and safe agronomic biofortification practice.
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