Paper Key : IRJ************164
Author: Shahzad Ali,Adnan Riaz
Date Published: 04 Nov 2022
ABSTRACTSilicon is a second most abundant element in the earth crust after oxygen but has not been proven to be as essential element for plant growth. Silicon present in earth crust in the form of silicon dioxide (SiO2) but in this form cannot be taken up by the plants; its taken up by plants in silicic acid or mono silicic acid {Si(OH)4 or H4SiO4}. Many beneficial affects reported in the different crops after their applications and applied silicon fertilizer increases the productivity and sustainability of crop production system. Generally, plants uptake silicon by roots transported to shoots in solution form, after loss of water from stomata, its forms polymerized silica gel thats accumulate beneath the stem and leaf surface. Polymerized gel has been proven to be lake of any role in the morphological functions of plant system. Actually, silicon protects the plant from stresses by two-way mechanism I) accumulation of silicon beneath surface of stem and leaves thats protect the plant physically while II) silicon mediate the natural defense system of the plant at genomic level to produce resistance. In this review, silicon in the environment (soil, water and plants), their role in mitigation of a-biotic (drought, salinity, heavy metals and nutritional imbalance) and biotic stresses (diseases and insect pests) are discussed. There is a complex relationship among the silicon and plant genotypes, species and varied environment.
DOI LINK : 10.56726/IRJMETS30959
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