Effect of Gibberellic Acid (GA3) on the Yield Attributing Traits during a Cold Period in Rice

Gibberellic acid is an essential growth promoter that aids in the systematic plant growth. Studies on the impact of GA3 during cold period discovered a positive effect on the growth of rice plants. The current study evaluated the impact of various concentrations of GA3 on the yielding attributes of rice during cold stress in the rice varities, JGL 18047, BPT 5204, and RNR 15048. All the quantitative traits showed significant variation among the genotypes and treatments. Gibberellins applied at low concentrations during seedling stage (1, 2 or 3 gm/200 m2 of nursery area) revealed higher quantitative trait values compared to higher concnetartions (5 and 10 gm). Among all the three varities, RNR 15048 was found to be the best variety than the others in terms of yielding triats. Therefore, GA3 applied at a concentration of 1gm, 2gm or 3gm promotes the rice plant growth during cold periods and results in higher yield. Among these, 2 gm of GA3 for 200 m2 of nurcessary area was found to be the best in aiding the crop growth during cold phase.