Impact of brassinolide in amelioration of salinity induced adverse effects on growth, yield attributes and yield of barley

Abstract

The study entitled “Impact of brassinolide in amelioration of salinity induced adverse effects on growth, yield attributes and yield of barley’’ was conducted in the cage house at Department of Plant Physiology, S.K.N. College of Agriculture Jobner during rabi season of 2015-2016 under pot culture experiments. Two wheat cultivars namely RD-2035 (salinity susceptible) and RD-2794 (Salinity tolerant) were grown in cemented pots under salinity (0, 3, 6, 9, and 12 dSm-1). Different concentrations of brassinolide (0.0, 0.5, 1.0 and 1.5 ppm) were sprayed at 45 and 75 days after sowing. Control plants were provided normal water. A significant decrease were recorded in Plant height, Leaf area, number of spikes/plant, number of seeds/spike, length of spike/plant, test weight, grain yield with increase in salt stress up to EC 12 dSm-1,Whereas the foliar spray treatment with brassinolide up to 1.5 ppm significantly increased Plant height, Leaf area, number of spikes/plant, number of seeds/spike, length of spike/plant, test weight, grain yield in both the cultivars under salt stress as well as non stress conditions. The 1.5ppm concentration of brassinolide was found most effective under salt stress and non stress conditions. RD-2794 observed superior over RD-2035 on the basis of physio-biochemical analysis.