Browsing by Author "Ajadi, I"

Now showing 1 - 4 of 4
  • Item
    Assay of Bioactive Compounds in Stored kolanuts
    (Faculty of Biosciences, Nnamdi Azikiwe University, Awka., 2023-01-28) Olahan, G.S.; Ajadi, I; Issa, B.T.
    Kolanuts are widely consumed by humans. The medicinal and therapeutic potentials of plants are credited to their bioactive compounds. This study was aimed at investigating the bioactive compounds in kolanuts from Ifelodun and Odo-Otin Local Government Areas of Osun State, popular kolanut producing LGAs in Nigeria. The bioactive compounds were identified using Gas Chromatography-Mass Spectrometry (CG-MS) to analyse crude extracts of the kolanuts using acetone: methanol (1: 1 v/v) as the extractant. Twenty five (25) bioactive compounds were identified, with 9-Octadecenoic acid, methyl ester (32.91%) being the predominant compound. Six (6) of the bioactive compounds were common in all the kolanuts (caffeine, hexadecanoic acid, methyl ester, n-hexadecanoic acid, 9, 12-Octadecadienoic acid, methyl ester (z, z), methyl stearate, and phthalic acid, di (oct-3-yl) ester). Some of the bioactive compounds were identified only in the kolanuts from Ifelodun LGA eg nonanoic acid, methyl-2-octylcyclopropene-1-heptanoate, 9-octadecanoic acid (z), 9-octadecanoic acid. Also, 11-octadecanoic acid, methyl ester (z), 2-chloroethyl linoleate, bicyclo (4.1. 0) heptane, etc were present only in the kolants from Odo-Otin LGA Out of the 25 bioactive compounds identified, only 12 have been reported to be present in kolanuts some of eg caffeine, n-Hexadecanoic acid, etc, while the remaining 13 have been reported in other plants other than kolanuts.
  • Item
    Bioclimatic Modeling of Current Geographic Distribution and Future Range Shifts of Selected Edible Mushrooms in Nigeria
    (Faculty of Life Sciences, Federal University Dutsin-Ma, Nigeria, 2024-03-31) Tiamiyu, B.B; Lateef ,A.A; Ajadi, I; Adeyemi, S.B; Owolabi, P.O; Sagaya, A; Abdulsalam, M; Abdulkareem, K.A; Mustapha, O.T
    Mushrooms, as part of the fungal kingdom, are essential components in nutrient cycling and carbon retention in terrestrial ecosystems. Monitoring the impact of climate change on fungi in their natural habitat is difficult because most species reside below the soil surface. As a result of a few reported occurrence records in Nigeria, we model the species distribution of two edible mushrooms, namely, Pleurotus ostreatus and Macrolepiota procera, using MaxEnt to predict the potential future range shifts under different climate change scenarios. In this study, we have calculated high model performances based on the Area under Curve (AUC) values generated (0.778-0.873). Using this modeling approach, the two species were predicted to have an expansion of their localized fundamental niches, pointing to the influence of precipitation as an important macroclimatic predictor. Highly suitable habitats for the two species were discovered primarily in Southern Nigeria, with less habitat suitability in the North-central Zone in 2050. The predicted models in this study do not tell missing geographical information, which could be achieved through citizen science for occurrence records and biodiversity conservation. However, they may be used to explore potentialities, such as understanding the possible distribution patterns of the two mushroom species in Nigeria. This can serve as a useful baseline to enhance the utilization and conservation efforts of these macrofungi as a result of climate change, habitat loss, and rapid urbanization.
  • Item
    In vitro antifungal efficacy of aqueous leaf extracts of neem (Azadirachta indica A. Juss.) against Lasiodiplodia theobromae, the cause of kola nuts rot in West Africa
    (Department Pathology, Faculty of Agricultural Sciences, University of Punjab, Pakistan., 2024) Olahan, G.S.; Ajadi, I
    In vitro efficacy of eco-friendly aqueous neem (Azadirachta indica A. Juss.) leaf extract was explored against the fungal pathogen Lasidioplodia theobromae (Pat.) Griffon & Maubl., the cause of storage rot of kolanuts (Cola nitida Schott & Endl.), in West Africa. Aqueous neem leaf extracts at concentrations of 10%, 30% and 50% (w/v) were used to amend freshly prepared potato dextrose agar culture medium on which discs of L. theobromae were inoculated followed by incubation at room temperature for 72 hours. The findings demonstrated significant inhibition of fungal growth, with the highest inhibition observed at 50% (w/v) concentration of the extract. This suggests that aqueous neem leaf extract possesses fungicidal properties againstL. theobromae, offering a natural alternative for controlling this pathogen and reducing pesticide residues instored kola nuts, as well as its effects on consumers and the environment as a whole.
  • Item
    Isolation and Molecular Identification of Bacteria Associated With Soil Surrounding The Root of Citrus (Citrus sinensis L.) Tree
    (Faculty of life and Physical Sciences, Fed. University, Dutsin-ma, 2024-06-30) Olahan, G.S; Ajadi, I
    Microbiological processes occur in the soil around the roots of land plants. This dynamic area, where plants and microorganisms interact, is crucial for the health and productivity of these plants. This study was aimed at isolating and molecularly identifying bacteria associated with the soil surrounding the root of an orange tree growing in the University of Ilorin, Nigeria to be able to know their roles, whether beneficial or harmful. Securing the soil is a way of having a food-secured world. Soil samples were collected at four different points from an orange tree trunk into separately labeled Ziploc bags using a separate sterile hand trowel for each collection. The labeled ziploc bags were brought to the University of Ilorin's Biology Laboratory for physicochemical analysis of the soil sample and isolation of bacteria using serial dilution method. Results of the physicochemical assessment of the bulked sample indicated that it is a sandy-loam soil with pH value of 6.7 (slightly neutral). Four bacterial species, i.e. Bacillus cereus, Lysinibacillusmacroides, Leucobacterkomogatae, and Alcaligenesfaecalis were isolated and identified molecularly. According to existing literature, the four bacterial species identified in this study are known for their abilities to enhance plant development and solubilize phosphorus, which are crucial for improving supply of nutrient.