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dc.creatorAndrade, Fabrício Ribeiro-
dc.creatorSilva, Geanderson Nascimento da-
dc.creatorGuimarães, Karina Carvalho-
dc.creatorBarreto, Herlon Bruno Ferreira-
dc.creatorSouza, Kamila Rezende Dázio de-
dc.creatorGuilherme, Luiz Roberto Guimarães-
dc.creatorFaquin, Valdemar-
dc.creatorReis, André Rodrigues dos-
dc.identifier.citationANDRADE, F. R. et al. Selenium protects rice plants from water deficit stress. Ecotoxicology and Environmental Safety, [S.l.], v. 164, p. 562-570, Nov. 2018.pt_BR
dc.description.abstractSelenium (Se) is essential to humans and animals due to its antioxidant properties. Although it is not considered an essential nutrient for higher plants. Many studies show that Se in low concentrations (up to 0.5 mg kg−1) provides beneficial effects to non-hyperaccumulating plants by participating in antioxidant defense systems and enhancing tolerance to abiotic stress. Therefore, this study aimed to evaluate the effects of Se application rates on rice plants under different soil water conditions. The experiment was conducted on an Oxisol using four Se rates (0, 0.5, 1.0 and 2.0 mg kg−1) and two soil water conditions (irrigated and water deficit). Selenium application via soil up to 0.5 mg kg−1 increased the plant height, chlorophyll index, sulfur and copper accumulation in shoots, carbon dioxide assimilation, superoxide dismutase (EC activity and decreased the hydrogen peroxide concentration in rice leaves. The accumulation of Se in shoot biomass and Se concentration in seeds increased linearly with the applied rates. Water deficit strongly decreased the plant growth and yield. However, rice plants treated with Se showed higher net photosynthesis, water use efficiency and antioxidant system. This study provides useful information about the roles of Se in protecting rice plants from water deficit stress.pt_BR
dc.sourceEcotoxicology and Environmental Safetypt_BR
dc.subjectAgronomic biofortificationpt_BR
dc.subjectSodium selenatept_BR
dc.subjectFood compositionpt_BR
dc.subjectAntioxidant enzymespt_BR
dc.subjectAbiotic stresspt_BR
dc.titleSelenium protects rice plants from water deficit stresspt_BR
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