info:eu-repo/semantics/article
Assessment of the effect of silicon on antioxidant enzymes in cotton plants by multivariate analysis
Fecha
2013-11Registro en:
Moldes, Carlos Alberto; Lima Filho, Oscar Fontão de; Camiña, José Manuel; Kiriachek, Soraya Gabriela; Molas, María Lía; et al.; Assessment of the effect of silicon on antioxidant enzymes in cotton plants by multivariate analysis; American Chemical Society; Journal of Agricultural and Food Chemistry; 61; 47; 11-2013; 11243-11249
0021-8561
CONICET Digital
CONICET
Autor
Moldes, Carlos Alberto
Lima Filho, Oscar Fontão de
Camiña, José Manuel
Kiriachek, Soraya Gabriela
Molas, María Lía
Tsai, Siu Mui
Resumen
Silicon has been extensively researched in relation to the response of plants to biotic and abiotic stress, as an element triggering defense mechanisms which activate the antioxidant system. Furthermore, in some species, adding silicon to unstressed plants modifies the activity of certain antioxidant enzymes participating in detoxifying processes. Thus, in this study, we analyzed the activity of antioxidant enzymes in leaves and roots of unstressed cotton plants fertilized with silicon (Si). Cotton plants were grown in hydroponic culture and added with increasing doses of potassium silicate; then, the enzymatic activity of catalase (CAT), guaiacol peroxidase (GPOX), ascorbate peroxidase (APX), and lipid peroxidation were determined. Using multivariate analysis, we found that silicon altered the activity of GPOX, APX, and CAT in roots and leaves of unstressed cotton plants, whereas lipid peroxidation was not affected. The analysis of these four variables in concert showed a clear differentiation among Si treatments. We observed that enzymatic activities in leaves and roots changed as silicon concentration increased, to stabilize at 100 and 200 mg Si L–1 treatments in leaves and roots, respectively. Those alterations would allow a new biochemical status that could be partially responsible for the beneficial effects of silicon. This study might contribute to adjust the silicon application doses for optimal fertilization, preventing potential toxic effects and unnecessary cost.