Impact of Gibberellic acid under salinity stress on Tomato (Lycopersicon esculentum L.)

Abstract

Tomato has important role in food and commercial utilization in the whole world, which is second to potato in global vegetable production. Susceptibility towards salinity stress has limited the productivity of Tomato. The experiment carried out at different salinity stress level during Rabi 2016-2017 on Tomato variety (P K M 1). To effects of gibberellic acid under salt stress condition of tomato with nine treatments including control with three replicates were laid out in Complete Randomized Design. Salt stress alters a wide array of plant metabolic mechanisms. Different strategies of the application of phytohormones are required to overcome the adverse effects of salt stress. Growth and biochemical attributes i.e. shoot length, leaf area, fresh weight, dry weight, number of fruits; chlorophyll concentration, lycopene ascorbic acid and proline were affected by salinity stress under NaCl treatment. But application of GA3 in combination was to be proved beneficial in alleviating the adverse effects of salt stress on these growth and biochemical parameters. However, GA3 applied with salt proved more effective in comparison to control. The results of the experiment revealed that combined application of GA3 and salt may ameliorate most of the attributes and was proved to be a physiological remedy to increase the tolerance against the ill effects of salt stress.