Resumen

LOPEZ-GUTIERREZ, María de Lourdes et al. Selenium and its effect on antioxidant status and mineral composition of lettuce. Rev. Mex. Cienc. Agríc [online]. 2015, vol.6, n.spe12, pp.2257-2262. ISSN 2007-0934.

Selenium is an element that does not appear on the lists of essential elements for plants and it is not considered in soil analysis, water and plant tissues. Different reports indicate that it seems to be associated with changes in cellular redox state. The aim of this study was to apply selenium in lettuce (Lactuca sativa) to assess the effect on growth, composition and antioxidant metabolism. The experiment consisted on the application of sodium selenite as foliar in concentrations of 0, 5 and 10 mg L-1 at 15, 30 and 45 days after transplantation. In plants the redox potential, biomass, mineral concentration and leaf catalase activity was determined. The application of selenium was effective in changing the redox potential and increase catalase activity without causing changes in mineral content and biomass.

Palabras llave : catalase; lettuce; minerals; sodium selenite.