PJB-2018-66
SALICYLIC ACID PRIMING MODULATES BIOCHEMICAL PARAMETERS TO IMPROVE SEEDLING GROWTH IN WHEAT (TRITICUM AESTIVUM L.) UNDER SALT STRESS CONDITION
Muhammad Azeem
Abstract
Salicylic acid (SA) is naturally existing signaling molecule in plants that modulate various physiological and biochemical activities against environmental stresses. Effect of 0, 0.5 and 1mM SA priming on seed germination, early seedling growth, photosynthetic pigments, total soluble carbohydrates, protein and total phenolic contents in wheat plant were investigated in vitro and in greenhouse under 0 and 60 mM NaCl concentrations. SA primed seeds were germinated at seedling growth and biochemical parameters were tested in vitro at seven days of incubation. Primed seeds significantly improved germination percentage, rate of germination, total chlorophylls, carbohydrates and proteins as compare to unprimed and hydro-primed controls. In greenhouse experiment, plants were grown for three weeks to evaluate the effect of SA. Primed seeds improved salinity tolerance by augmenting total chlorophylls, carbohydrates and protein contents in wheat. Decrease in phenolic contents of SA treated plants indicated the reduction in salt induced damages. Application of SA showed potential for promoting plant growth under saline/marginal habitat.
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