Impact of Gibberellic Acid Treatments on Germinationof Cleopatra Mandarin Seeds

This study was carried out throughout two successive seasons (2021 and 2022) for investigating GA3 pre-sowing soak solutions influence on Cleopatra mandarin seeds (Citrus reshni L.). It was aimed to enhance the Cleopatra mandarin seeds germination process, as well as seedlings vigor. Thus, seeds of Cleopatra mandarin rootstock were subjected to soaking for 24 hours in GA3 solutions at 200, 250, and 300 ppm as well as soaking in tap water (control treatment), for investigating their effect on some germination and growth parameters. Data obtained during both experimental seasons revealed obviously that all GA3 treatments increased significantly both germination measurements (total germinated seeds & germination %) and some growth parameters as compared to control (soak for 24 hours in tap water). However, soaking in GA3 at 250 and 300 ppm concentrated solutions particularly were statistically the most effective in this study.