EFFECTS OF WATER SOAKING AND LIGHT ON THE DORMANCY OF GARCINIA KOLA (HECKEL) SEEDS (Published)
Freshly collected fruits were extracted for the seeds and air dried for 3 days. The coat of the seeds were removed and subjected to 5 treatments namely: no soaking (T1), soaking for 24 hours (T2), 48 hours (T3), 72 hours (T4) and 96 hours (T5). The experiment was laid out in a Completely Randomized Design (CRD) with 10 seeds per treatment inside polythene bags. Germination commenced on the 2nd week for seeds soaked for 72 hours (T4) and 96 hours (T5) respectively. Germination was delayed and scanty in T1 and T2 compared to other treatments. The germination period ranged between 12 to 62 days. Duration of soaking significantly affected the cumulative germination, complete dormancy period, number of radicle, length of radicle, height of plumule and number of primary leaves at (p≤0.05). Germination of G. kola seeds can be done based on the information given in this study.
Keywords: Dormancy Breaking, Garcinia Kola, Germination, Light, Seed, Soaking Period
PRE-GERMINATION AND DORMANCY RESPONSE OF ADANSONIA DIGITATA L SEEDS TO PRE-TREATMENT TECHNIQUES AND GROWTH MEDIA (Published)
The study investigated the effects of three pre-treatment techniques and growing media the dormancy and growth response of baobab seeds. The seeds were immersed in cold water (25-28oC), hot water (100oC), and sulphuric acid (10%, 50% and 98% conc. levels) at different time intervals. The seeds after pre-treatment were sown on three different growth media. Randomized Complete Block Design with 3 treatments and 3 germination media was adopted for this experiment. The result showed that earliest mean days of emergence (8days) was observed in seeds subjected to acid treatment at 98% conc. The highest (17 seeds) rate of germination was recorded in 98% acid conc. soaked for 1h and sowed in sandy soil growth medium with high significant variation. 98% acid conc. recorded the highest germination percentage ranging from 62% – 85%, while other treatments recorded a lower germination percentage (5% to 40%). Sandy soil growth medium showed significant effect in 98% acid treatment soaked for 1hr. The sawdust gave significant germination effect for hot water treatment. Thus, 98% acid concentration soaked for 1h and sowed in sandy soil growth medium was recommended for pretreatment of Adansonia digitata seeds prior to planting to improve germination performance
Keywords: Dormancy, Germination, Growth Media and Adansonia digitata L, Pre-treatment