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- W2369967237 abstract "The aim of the present work was to study the mechanism of the silicon-mediated antioxidant system in roots of rice grown under excess manganese(Mn) stress and Mn tolerance regulated by silicon(Si).Two rice varieties that differ in Mn tolerance were cultured in nutrient solution to study the effects of Si(1.5 mmol · L-1) on antioxidant systems of rice roots under excess Mn stress(2 mmol · L-1).For the Mn-sensitive cultivar(XXY),excess Mn significantly increased the activities of superoxide dismutase(SOD),the concentrations of ascorbate(AsA) and non-protein thiols(NPT),while it significantly decreased the activities of catalase(CAT) and ascorbate peroxidase(APX) and the concentrations of glutathione(GSH),thus leading to accumulation of high levels of malondialdehyde(MDA) in root tissues and destruction of plasma membrane integrity.However,excess Mn significantly increased the concentrations of GSH and AsA,but significantly decreased the activities of CAT and the concentrations of NPT,thus leading to accumulation of high level of MDA in the Mn-tolerant cultivar(ZLY).The addition of Si significantly decreased the concentrations of MDA and H2O2 in Mn-stressed root tissues,thereby mitigating the damage.Under excess Mn stress,application of silicon enhances the antioxidant activities of rice roots,and reduces lipid peroxidation and damage to the integrity of the apical membrane,thereby enhancing rice resistance to manganese toxicity.This alleviative effect is more pronounced in Mn-sensitive rice(XXY) than in Mn-tolerant rice(ZLY)." @default.
- W2369967237 created "2016-06-24" @default.
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- W2369967237 date "2011-01-01" @default.
- W2369967237 modified "2023-09-26" @default.
- W2369967237 title "Silicon-mediated antioxidant reactions and membrane lipid peroxidation in roots of rice(Oryza sativa L.) exposed to excess manganese" @default.
- W2369967237 hasPublicationYear "2011" @default.
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