Browsing by Author "Etejere E. O."

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    Effect of exogenous proline on yield, lipid peroxidation and enzymatic activities of cadmium-stressed Roma Vf Tomato (Solanum lycopersicum L.)
    (Adeleke University Journal of Science (AUJS), 2023) Adelowo, J. M.; Olayinka B. U.; Etejere E. O.
    This study investigated the effect of foliar-spray of exogenous proline on cadmium-stressed tomato seedlings for two successive seasons at the experimental farm of Adeleke University, Ede, Nigeria. The seedlings were grown in a nursery bed for 4 weeks and thereafter transplanted. Two weeks after transplantation, the plants were stressed with cadmium and the foliar part was sprayed with proline the same day they were subjected to cadmium stress as follow in triplicate: treatment 1: control; treatment 2: 0.3 mM cadmium (Cd); treatment 3: 1.2 mM Cd; treatment 4: 0.3 mM Cd + 5 mg/l proline; treatment 5: 0.3 mM Cd + 10 mg/l proline; treatment 6: 0.3 mM Cd + 15 mg/l proline; treatment 7: 1.2 mM Cd + 5 mg/l proline; treatment 8: 1.2 mM Cd + 10 mg/l proline and treatment 9: 1.2 mM Cd + 15 mg/l proline. The experiment was laid in a complete randomized design with three replications. The farm plots were irrigated on a 2-day basis. The parameters studied were lipid peroxidation, enzymatic activities, fruit yield, and proximate composition of the fruit. The result showed that Cd stress caused increase in lipid peroxidation and reduced tomato fruit yield. Application of proline to the stressed plants lowered the lipid peroxidation level, raised enzymatic activities, and increased fruit yield, and total protein content. Plots stressed with 0.3 mM Cd and sprayed with 15 mg/l proline gave fruit yield which was significantly the same with the yield of control. The study concluded that application of proline mitigated the harmful effects of cadmium stress on S. lycopersicum and hence, can be integrated into farming in cadmium-polluted area.
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    Influence of weed management strategies on proximate composition of two varieties of groundnut (Arachis hypogaea L.)
    (Annals Food Science Technology, 2013) Olayinka, B. U.; Etejere E. O.
    Information on the use of rice straw mulch for weed control to limit herbicide use and its effect on nutritional contents of the groundnut seed is scanty. Field experiment was conducted in 2011 at Lafiagi, Kwara State, a Southern Guinea savanna zone of Nigeria to evaluate the impact of weed management strategies on proximate composition of two varieties (Samnut 10 and MK 373) of groundnut seeds. Experimental layout was a split plot randomized complete block design with three replications. The treatments include: Pendimethalin at 1.5 l/ha; Pendimethalin at 1.5 l/ha + one hand weeding at 6 Weeks After Sowing (WAS); Rice straw mulch at 0.1m depth; Rice straw mulch at 0.1m depth + one hand weeding at 6 WAS Two hand weeding at 3 and 6 WAS; Weed free check (positive control) and Weedy check (negative control). The results revealed that there were significance differences in all the proximate parameters assessed except the moisture content. Regardless of all the treatments investigated, percentage moisture content, ash content, crude fibre, crude fat, crude protein and carbohydrate in both varieties ranged between 4.63-4.90, 2.45-3.10, 7.55-8.39, 43.67-48.33, 26.43-35.13 and 4.99-10.27% respectively. Rice straw mulch + one weeding at 6 WAS significantly (p<0.05) increased crude protein, and ash content over all other treatments except the weed free check. The enhancement of protein and minerals content of groundnut seed by this treatment could be promising agronomical practices for meeting the nutritional needs of man in Africa as well as limiting the use of herbicide.