Effects of Selenium on Physiological Property and Selenium Accumulation of Lactuca sativa

Abstract

The Effects of six selenium concentrations (0, 5, 10, 25, 50, 75, and 100 mg/kg) on physiological property and selenium accumulation of Lactuca sativa were conducted by a pot experiment. 5 mg/kg of Se concentration can promote L. sativa biomass increased. Above 5 mg/kg, Se can restrain L. sativa growth. L. sativa can enrich plenty Se in high Se soil and the roots Se content distribution is higher than shoots. With the Se concentration increased, the Se content of roots and shoots increased. When Se concentration was 10-100 mg/kg, the Se content in roots was 1.34, 4.49, 5.44, 11.20 and 17.42 times higher than that of 5 mg/kg, respectively, the Se content in shoots was 1.91, 4.14, 5.13, 6.14 and 8.69 times higher than that of 5 mg/kg, respectively, the Se accumulation in roots was 1.15, 3.70, 3.58, 4.36 and 4.50 times higher than that of 5 mg/kg, respectively, the Se accumulation in shoots were 1.31, 1.56, 1.61, 1.63 and 1.94 times higher than that of 5 mg/kg, respectively. Both the Se content and Se accumulation of L. sativa reached maximum at 100 mg/kg of Se concentration. Therefore, exerting 100 mg/kg of Se concentration, the Se enrichment of L. sativa is the best.