Influence of Brassinolide and Salicylic acid on biochemical parameters of wheat ( Triticum aestivum L.) under salinity stress.

摘要

A laboratory experiment was conducted to study the effect of salinity on biochemical parameters of wheat seeds and to see the extent of effectiveness of two growth regulators viz. Brassinolide (BS) and Salicylic acid (SA) in ameliorating the deleterious effects of salinity on seedling metabolism. The seeds of wheat var. GW-366 were presoaked in three concentrations of BS viz., 0.125, 0.150 and 0.175 mg/l and SA viz., 50, 75 and 100 mg/l for 2 hrs under salinity stress given by 50 mM and 100 mM NaCl. Brassinolide @ 0.150 and 0.175 mg/l and SA @ 75 mg/l enhanced catalase activity whereas BS @ 0.125 mg/l and SA @ 100 mg/l enhanced peroxidase activity. Brassinolide @ 0.125 mg/l and 0.175 mg/l and SA @ 75 and 100 mg/l increased proline content and total soluble sugar content. Considering the effect of growth regulators in ameliorating the salinity stress, it was observed that the low concentration of both the bioregulators could ameliorate the salinity stress effect through increased activities of H 2O 2 scavenging enzymes viz., catalase and peroxidase, as also through enhanced level of proline. Incremental trend of total sugar was observed under stress condition with the highest concentration of BS and SA.