Effect of Extraction Method, Soil Media on Germination and Seedling Establishment of Chrysophyllum Albidum (Published)
This research was aimed at using seed extraction methods, soil media and planting density to enhance seed germination and seedling growth of Chrysophyllum albidum commonly known as star apple. The experiment was conducted in two stages, mature, healthy ripe fruits were used and the seeds were extracted from the fruits. The experiment involves the extraction of uniform number of seeds of pulpled and depulped, planted into the various soil media. Result on planting density also showed that Depulped seeds/ seedlings at (p=0.05), recorded significant increase in germination percentage and seedling growth. The finding shows that when seeds are depulped, they enhance germination percentage and addition of poultry manure to the soil media encourages plant growth.
Studies on Methods of Breaking Seed Dormancy and Germination Enhancement in Senna Alata (L.) Roxb., A Plant With Great Medicinal Value (Published)
Senna alata is a plant with great medicinal value that belongs to Fabaceae family and grows as wild perennial shrubby species. Seeds of this species possess seed coat-induced dormancy. The seeds were subjected to different treatment methods and durations of exposure to break the dormancy and enhance germination. Treatments includes scarification with 60, 80 and 100% H2SO4 and HCL for 2, 4 and 6 min; exposure to 60, 80 and 100 0C dry (oven) and wet (hot water) heat for 2, 4 and 6 min; and soaking in water for 12, 24, 36, 48, 60, 72, 84 and 96 h. The experimental results revealed that seeds scarified with 100% H2SO4 for 4 and 6 min were the most effective treatments for enhancing seed germination (both gave 100.00% germination), followed by 100 0C wet heat for 6 min (77.50%) and 80% H2SO4 for 6 min (70.00%). Other treatments were less effective. The treatments that gave significantly higher germination percentages also produced low MGT (1.80, 1.73, 2.71 and 1.51 days, respectively) and increased GI (90.25, 92.67. 63.00 and 65.00, respectively) without having any significant negative effects on the radicle length of the seedlings. These are desirable for field establishment and production of uniform plant population of S. alata
CHANGES IN NUTRITIVE VALUE AND IN VITRO DIGESTIBILITY OF PROTEINS FROM NAKED OATS DURING GERMINATION (Published)
Changes in the content, nutritive value, and in vitro protein digestibility of proteins were investigated during germination of naked oats. Compared with raw groats, an increase in crude protein from oat groats was continuously observed during germination. The nutritive value of proteins and in vitro protein digestibility of oats increased during germination as compared with raw oats. However, the choice of germination time might be of great importance and germination for 48h under highly controlled conditions would be sufficient to improve the nutritive value and digestibility of naked oats in the present study.
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.
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
STUDY OF THE INSECTICIDAL ACTIVITY OF THE ESSENTIAL OIL OF CHENOPODIUM AMBROSIOÏDES (L.) (CHENOPODIACEAE) ON SITOPHILUS ORYZAE (COLEOPTERA: CURCULIONIDAE) (Review Completed - Accepted)
Our study is about the valorization of essential oil of Chenopodium ambrosioïdes (L.) as botanical insecticide on Sitophilus oryzae during the storage of Triticum turgidum (L.) subsp. Durum (Desf.) Husn. In fact, the insecticide activity of essential oil extracted by hydrodistillation from that plant has been tested by fumigation on the grains of Triticum turgidum (L.) subsp. Durum (Desf.) Husn. after seven concentrations at the temperature beginning from 24 to 28°C and humidity of 70%. The same concentrations have been tested on S. oryzae by fumigation. During all the period of exposition the LC50 – and LC99 doses have been determined and, also, the lethal times required for the death of 50% (LT50) and 99% (LT99) of adults exposed to different concentrations of essential oils. We notice that essential oil presents no effect on the germination of grains of Triticum turgidum (L.) subsp. Durum (Desf.) Husn., on the contrary, it makes a very significant insecticide effect on S. oryzae.