Browsing by Author "Muhammed, G. Y."

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    Effect of phosphorus fertilizer and shoot pruning on growth, yield and fruit quality of tomato (Solanum lycopersicum)
    (Indian Journal of Agricultural Sciences, 2023) Olayinka, B. U.; Oyewole, M.; Jacobs, O. E.; Abdulkareem, K. A.; Lawal, A. R.; AbdulRauf, L. B.; Kareem, I.; Muhammed, G. Y.; Abdulbaki, A. S.
    Phosphorus fertilization or pruning as sole practice has been established to enhance tomato yield. However, there is a dearth of knowledge when both practices are combined. Under potted experiment, two tomato varieties (Tomato 82-B and Local) were subjected to 13 treatment combinations of phosphorus fertilization and pruning between June and September, 2021 in a garden situated at Ilorin, Nigeria. In both varieties, plants receiving 30 kg P/ha + two-stem pruning recorded highest growth indices. Marketable fruit yield was remarkably enhanced under 45 kg P/ha + four-stem pruning and 30 kg P/ha + two-stem pruning in local and Tomato 82-B respectively. Local variety showed more vigorous growth and yield than Tomato 82-B. Proximate compositions showed inconsistent results. Ascorbic acid, beta-carotene and lycopene were highest in tomato plants receiving 60 kg P/ha + four-stem pruning, 15 kg P/ha + three-stem pruning and 45 kg P/ha + four-stem respectively. Tomato 82-B had higher ascorbic acid and beta-carotene than the local variety. Conclusively, four-stem pruning + 45 kg/ha and two-stem pruning + 30 kg/ha are considered optimum for improving the yield of tomato varieties studied and that combination of pruning and phosphorus fertilization showed little influence on the fruit quality.
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    Mitigating salinity stress in groundnut (Arachis hypogaea L.) Through Salicylic Acid Application
    (Biological and Environmental Sciences Journal for the Tropics, 2025) Olayinka, B. U.; Abdulbaki A. S.; Mahmud, H. U.; Muhammed, G. Y.; Akinyemi, O. C.; Ayuba, A. K.
    Soil salinity is a major abiotic stress factor that adversely affects the growth, yield, and quality of many crops, including Arachis hypogaea (groundnut). This study investigated the potential of salicylic acid (SA) in mitigating the negative effects of salinity stress in groundnut. A germination experiment was conducted on two groundnut varieties, SAMNUT-11 and SAMNUT-14, which were exposed to varying concentrations of sodium chloride (NaCl) solutions (0, 50, 100, 150, and 200 mM), with or without SA treatment. The experiment followed a completely randomized design with ten treatment combinations and three replications. The effects of SA were evaluated on morphological parameters such as germination percentage, fresh weight, and plumule length, alongside key biochemical indicators of oxidative stress, including reactive oxygen species (ROS), malondialdehyde (MDA), and reduced glutathione (GSH). Results showed that SA significantly enhanced seed germination and seedling growth under saline conditions, particularly at moderate salt concentrations (≤100 mM). In addition, SA application effectively reduced ROS and MDA levels while increasing GSH content, indicating its protective role against oxidative damage. Among the two varieties tested, SAMNUT-14 exhibited greater salt tolerance, demonstrated by superior morphological performance and more favourable biochemical responses compared to SAMNUT-11. These findings suggest that exogenous SA application can improve salt tolerance in groundnut by modulating oxidative stress responses, offering a promising approach for enhancing crop productivity in saline soils. Further research is warranted to elucidate the underlying physiological and molecular mechanisms of SA-mediated stress mitigation and to optimize its field application.