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The Soil Science of Silicon

Role of Silicon in Enhancing the Resistance  of Plants to Biotic and  Abiotic  Stresses

Although silicon (Si) has not been recognized as  an  essential element for plant growth, the beneficial effects  of Si have been observed in a wide variety of plant species. The  beneficial effects of Si are usually expressed more clearly in  Si-accumulating plants under various abi• otic  and biotic  stress  conditions.  Silicon is  effective  in  controlling various pests  and   dis• eases  caused by  both  fungi  and   bacteria  in   different  plant  species. Silicon  also  exerts alleviative  effects  on various abiotic  stresses including salt stress, metal toxicity,  drought stress,  radiation damage, nutrient imbalance, high temperature,  freezing and so  on. These beneficial effects  are mainly attributed to the high accumulation of silica on the tissue sur• face although other mechanisms have also been proposed. To obtain plants resistant to mul• tiple stresses,  genetic  modification  of the root  ability  to take up  Si  has been proposed.  In this review,  the role of Si in  conferring resistance  to mutiple  stresses  is  described….Click here for more

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