Effect of exogenous Selenium on the growth and Selenium accumulation of Talinum paniculatum (Jacq.) Gaertn

Abstract

In this study, we added different Selenium (Se) concentrations (0 mg⋅kg−1, 2.5 mg⋅kg−1, 5.0 mg⋅kg−1, 10.0 mg⋅kg−1, 20.0 mg⋅kg−1) into soil to study the effect of Se on the growth, quality and Se content of Talinum paniculatum (Jacq.) Gaertn. The results show that different Se concentration has significant different influence on the growth of T. paniculatum. Low Se concentration can promote the growth of T. paniculatum, but high Se concentration would inhibit the growth of T. paniculatum. The chlorophyll content of T. paniculatum increased with the increase of Se concentration, which was beneficial to the photosynthesis of T. paniculatum. The Se content of T. paniculatum increased gradually with the increase of Se concentration, and the rule of Se content of T. paniculatum was root > leaf > stem. Taken together, the optimum concentration of Se in the soil of T. paniculatum cultivation was about 5.0∼10.0 mg⋅kg−1.