Authors : A.A. Ajiboye
Abstract: The seeds of Prosopis africana (Guill and Peer Taub) and Dialium guineensis (Wild) were investigated. The trees of these seeds were among many ones that are fast going into extinction due to reckless falling and annual bush burning with little regard for replanting. The seeds of this species have been found to be dormant while little regard for aforestation. The influence of dry heat treatments at 76°C and Gibberrellic acid (GA3) on seed germination and seedling growth were investigated. The dry heat oven treatments (76°C) gave maximum percentage 50-60% in P. africana seeds when subjected to about 8 h treatments within 15th-24th day of sowing. While minimum germination percentage for this treatment was 10% under 4 h treatments within 15th-24th days of sowing. The control experiment was 0% throughout. D. guineensis seeds at 76°C oven dry treatment was 40-45% as maximum within 15-24 days. The minimum germination was 5-10% under 15-24 days when treated for 4-8 h. The control showed no evidence of germination D. guineensis. The influence of these treatments were equally investigated on the seedling growth of this species. The treatment greatly enhanced the seed growth of P. africana especially the seedling height 30±2.0 cm and leaf number 15.0. But the seedling growth in D. guineensis plant were less enhanced. Seedling height 28±5.0 cm and 12.0 in leaf number. However, the treatments had significant effect (p<0.05) on the seedling development when compared with control. Seedling height in control was 6.0±0.0 cm and 4.2±1 for P. africana and D. guineensis, respectively. In control, the leaf area was 10±8.1 cm2 and 10±2.0 cm2 in D. guineensis. This showed that the investigation on seedling growths was better enhanced than control. The experimental design was the randomized block type. All data was subjected to Analysis of Variance (ANOVA). All laboratory experiments was in five replicates, while field experiment was in 3 replicates.
A.A. Ajiboye , 2008. Influence of Dry Heat Treatments (76°C) and Gibberellic Acid (GA3) on Seed Germination and Seedling Growth of Prosopis africana (Guill and Perr Taub) and Dialium guineensis (Wild). Research Journal of Applied Sciences, 3: 306-310.