Potential impacts of gibberellic acid to promote salinity tolerance in tomato

Salinity is an important concern for crop production, especially in dry areas and gibberellic acid has shown promise in improving salinity tolerance. The purpose of this research was to examine the ability of gibberellic acid (GA3) to mitigate salinity stress in tomato plants. The experiment used BARI Hybrid Tomato-5 to investigate the effects of two GA3 dosages (0 and 100 ppm) on plant growth, physiology, and yield parameters in normal and stressed conditions (50, 100, and 150 mM NaCl). Salinity revealed a negative effect on tomato plants in terms of plant height, leaf and branch numbers, flowering and fruiting phases, and physiological features such as photosynthetic pigments, relative leaf water content, electrolyte leakage, proline content, and stomatal conductance including Na+ and K+ ions of plants. The foliar spray of GA3 was useful in enhancing the salt tolerance of tomato plants and stimulated the growth of unstressed plants, resulting in increasing tomato yield.