| Popis: |
Tree seeds exhibit some degree of dormancy. Similarly, the seeds of Terminalia ivorensis germinate with great difficulties. To break the dormancy and improve the germination capability of seeds, different types of mechanical and physiological approaches can be followed. Accordingly, the seeds of T. ivorensis were subjected to two pre-sowing treatments (one is with seeds soaked in water for 24 hours and the other is with seeds soaked for 10 minutes in 80% concentrated H2SO4 then abundantly rinsed in running water for 20 minutes) in addition to the control one. So, a total of 100 seeds divided into 4 replications (25 seeds per tray) were tested for each treatment. Then, treated seeds were sown in sand tray to seed the germination characteristic of the different treatments. The sown seeds were followed up for 5 months with proper watering, and the germination record was taken accordingly. Analysis of the germination of the different treatments shows that seeds that were not treated exhibits better mean germination percentages (62%) followed by the one with seeds soaked for 24 hours (47%). However, seeds treated with 80% [H2SO4] for 10 minutes then abundantly rinsed in running water for 20 minutes showed no germination. So, both the 62% and 47% germination recorded are fairly accepted results considering the low germination capacity of T. ivorensis in laboratory and natural conditions. However, other possible pre-sowing treatment techniques can be studied and incorporated for increasing the seed germination of T. ivorensis in-vitro in addition to the records obtained in this trial. |
