Silicon importance on Aliviating Biotic and Abiotic Stress on crop plants

Role of Silicon in Alleviating Biotic and Abiotic Stresses in Plants1

Speaker : Rakesh SharmaID. 48030 M.Sc. AgDeptt. of Plant PhysiologyGBPUAT,PANTNAGAR

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INTRODUCTIONAvailable form: Silica dioxide

At room temperature silicon exist in two forms

Crystalline Amorphous

Figure: Mono & polysilicilic acids

Chemically active and available form of Si in soil areMonosilicic acid Si(OH)4Polysilicic acid

Concentration range between 0.1mM - 0.6mM (Epstein, 1994)

SILICON IN SOIL

ABUNDANCE IN SOIL

3/13/20165Fig .Distribution of element in earth crustSommer et al 2006

SILICON IN PLANTS

Concentration of Si in plants on the basis of dry weight varies between 0.1 - 10%.

High concentration in monocot

Its level increased from legumes