Mechanisms of silicon-mediated alleviation of drought and salt stress in plants: a review

Environmental Science and Pollution Research International
Muhammad RizwanFarhat Abbas

Abstract

Drought and salinity are the main abiotic stresses limiting crop yield and quality worldwide. Improving food production in drought- and salt-prone areas is the key to meet the increasing food demands in near future. It has been widely reported that silicon (Si), a second most abundant element in soil, could reduce drought and salt stress in plants. Here, we reviewed the emerging role of Si in enhancing drought and salt tolerance in plants and highlighted the mechanisms through which Si could alleviate both drought and salt stress in plants. Silicon application increased plant growth, biomass, photosynthetic pigments, straw and grain yield, and quality under either drought or salt stress. Under both salt and drought stress, the key mechanisms evoked are nutrient elements homeostasis, modification of gas exchange attributes, osmotic adjustment, regulating the synthesis of compatible solutes, stimulation of antioxidant enzymes, and gene expression in plants. In addition, Si application decreased Na(+) uptake and translocation while increased K(+) uptake and translocation under salt stress. However, these mechanisms vary with plant species, genotype, growth conditions, duration of stress imposed, and so on. This review article high...Continue Reading

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Citations

Nov 5, 2015·Environmental Science and Pollution Research International·Muhammad RizwanYong Sik Ok
Mar 26, 2016·Frontiers in Plant Science·Arafat A Abdel Latef, Lam-Son P Tran
Apr 12, 2016·Ecotoxicology and Environmental Safety·Muhammad RizwanYong Sik Ok
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