Selenium protects rice plants from water deficit stress

Ecotoxicology and Environmental Safety
Fabrício Ribeiro AndradeAndré Rodrigues Dos Reis

Abstract

Selenium (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 1.15.1.1) 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 usef...Continue Reading

Citations

Feb 26, 2019·Frontiers in Plant Science·Kondeti SubramanyamEls J M Van Damme
Feb 9, 2021·Plant Physiology and Biochemistry : PPB·Tauan Rimoldi TavantiAndré Rodrigues Dos Reis
May 8, 2021·Plant Physiology and Biochemistry : PPB·Maria Gabriela Dantas Bereta Lanza, André Rodrigues Dos Reis
Sep 6, 2020·Ecotoxicology and Environmental Safety·Matheus Pereira de Brito MateusAndré Rodrigues Dos Reis
Sep 12, 2020·Ecotoxicology and Environmental Safety·Maria Gabriela Dantas Bereta LanzaAndré Rodrigues Dos Reis

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