Silicon dioxide nanoparticles ameliorate the phytotoxic hazards of aluminum in maize grown on acidic soil

The Science of the Total Environment
Alexandra de SousaHamada AbdElgawad

Abstract

Aluminum (Al) toxicity is a major constraint for crop production in acid soils. Therefore, looking for sustainable solutions to increase plant tolerance to Al toxicity is needed. Although several studies addressed the potential utilization of silica or silicon dioxide nanoparticles (SNPs) to ameliorate heavy metal phytotoxicity, the exact mechanisms underlying SNPs-induced stress tolerance are still unknown. The current study investigated how SNPs could mitigate Al toxicity in maize plants grown on acidic soil. The impact of Al alone or in combination with SNPs on Al accumulation and detoxification, plant growth, photosynthetic C assimilation and redox homeostasis has been investigated. Al accumulation in stressed-maize organs reduced their growth, decreased photosynthesis related parameters and increased production of reactive oxygen species, through induced NADPH oxidase and photorespiration activities, and cell damage. These effects were more pronounced in roots than in leaves. SNPs ameliorated Al toxicity at growth, physiological and oxidative damage levels. Co-application of SNPs significantly reduced the activities of the photorespiratory enzymes and NADPH oxidase. It stimulated the antioxidant defense systems at enzymati...Continue Reading

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Citations

Jan 18, 2020·Journal of Experimental Botany·Martin J Hodson, David E Evans
Oct 24, 2020·The Science of the Total Environment·Rajpal ShettyMarek Vaculík
Feb 1, 2021·Journal of Hazardous Materials·Durgesh Kumar TripathiFrancisco J Corpas
Jul 8, 2021·Journal of Hazardous Materials·Hamada AbdElgawadSébastjen Schoenaers
Jul 17, 2021·Journal of Hazardous Materials·Zsuzsanna Kolbert, Attila Ördög
Jul 28, 2021·Plant Physiology and Biochemistry : PPB·Nuno Mariz-PonteSónia Silva

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