Browsing by Author "Ajijolakewu, Kamoldeen Abiodun"

Now showing 1 - 5 of 5
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    Genome sequencing of endophytic bacterial species associated with Datura stramonium and Sida acuta
    (Zagazig University, 2025) Zakariyah, Rahmat Folashade; Ajijolakewu, Kamoldeen Abiodun; Ayoola, Saheed Abiodun; Ajadi, Ayobami Elias; Kazeem, Muinat Olanike; Oyedele, Julius Olusegun
    Background: Endophytes are ubiquitous microbes that colonize plants’ tissues without causing any harm to the host plants, but rather, they confer several adaptable characteristics on them. They could be of bacterial, fungal, algal, archaeal and actinomycetes origins. Endophytes also produce useful bioactive metabolites some of which are potent antimicrobials. In this study, bacterial endophytes were isolated from the leaves of Datura stramonium and Sida acuta, both of which are important medicinal plants. Methods: Freshly cut leaves were collected, rinsed and sequentially sterilized. The sterilized leaves were then cut into smaller pieces and incubated onto extract-seeded nutrient agar medium augmented with antifungal drug. Pure distinct bacterial colonies were morphologically and biochemically characterized. Molecular characterization of the strains was done using the 16S rRNA while phylogenetic evolutionary analysis was carried out using the maximum likelihood method and Tamura-Nei model with MEGA 11 software. Results: A total of 7 bacterial endophytes were isolated and identified, 3 from D. stramonium and 4 from S. acuta. 16S rDNA genome sequencing of the strains revealed that isolates from D. stramonium were Pseudomonas aeruginosa, Atlantibacter hermannii and Enterobacter roggenkampii while those isolated from S. acuta were identified as Pseudomonas aeruginosa, Pseudomonas monteilii, Enterobacter pseudoroggenkampii and Aeromonas veronii. Conclusion: The outcome of this research has indicated that numerous strains of endophytic bacteria inhabit leaves of plants. It is therefore essential to exploit these endophytic bacteria for their potentials to produce bioactive metabolites and other valuable antimicrobial products.
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    Optimization of conditions for the production of indole acetic acid by Azotobacter spp.
    (Umaru Musa Yar'adua University, 2023) Sule, Ismaila Olawale; Agbabiaka, Toyin Olayemi; Saliu, Bolanle Kudirat; Ajijolakewu, Kamoldeen Abiodun; Zakariyah, Rahmat Folashade
    The use of chemical fertilizers in crop production has detrimental effects such as soil acidity and eutrophication. There is need for environmentally friendly approach in improving soil nutrients and agricultural productivity. This study aimed at the isolation of Azotobacter spp from the rhizosphere of crops and the use of these isolates as biofertilizer for the growth of potted maize plants under 5 treatments. These treatments were maize plant only (control), plant with once application of NPK fertilizer, plants with once, weekly and fortnights application of Azotobacter spp. as bio inoculants. The counts of Azotobacter obtained from the rhizosphere of the crops ranged from 4.0 × 104 – 1.0 × 106 CFU/g. The three high ranking in-vitro biological nitrogen fixing and phosphate solubilization isolates were identified A. chroococcum, A. vinelandii and A. beijerinckii. At the 7th weeks of growth, 83.3 and 100% of the plants that received different levels of bio inoculants had the perimeter of their girths greater than and significantly different from the controls when cultivated in 8.1 and 12.0 litre pots respectively. At least 91.7% of the plants that received bio-inoculants had higher heights than the controls. It is concluded that the application of Azotobacter bio-inoculants enhanced the growth of maize plants compared to the controls.
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    Progress in endophytic fungi secondary metabolites: biosynthetic gene cluster reactivation and advances in metabolomics
    (Springer, 2024) Zakariyah, Rahmat Folashade; Ajijolakewu, Kamoldeen Abiodun; Ayodele, Ayomide Joseph; Folami‑A, Barnabas Ipinnuoluwa; Samuel, Elohor Precious; Otuoze, Sabdat Omeneke; Abdulrauf, Lukman Bola; Ahmed, Risikat Nike
    Background Fungal endophytes exhibit symbiotic relationships with their host plants but have recently emerged as sources for synthesizing important varieties of secondary metabolites (SMs). Many of these metabolites have shown significant importance as antibacterial, antifungal, antitumor, and anticancer drugs, leading to their explora‑ tion in medicine and pharmaceuticals. Main body of the abstract The endophytes’ biosynthetic gene clusters (BGCs) are responsible for encoding enzymes that produce these SMs. The fungal endophytes’ ability has been challenged due to their inability to trigger cryptic BGCs and their loss of ability to produce secondary metabolites over an extended period in an artificial culture medium. This review investigates the array of SMs produced by endophytic fungi. It identifies methods for awakening and exploiting silent BGCs to produce novel natural metabolites and explores recent advancements in metabolomics platforms used to profile SMs. Silent BGCs can be activated using various methods, including co-cultivation, one strain of many compounds, epigenetic modification, heterologous expression, and cluster-specific transcription factor methods. Short conclusion These methods reviewed effectively enhance the production of silent BGCs, leading to a signifi‑ cant increase in secondary metabolite production. Meanwhile, metabolomics profiling using liquid or gas chromatog‑ raphy coupled with mass spectrometry could provide several chances to discover bioactive compounds’ complexity and chemical diversity. This review has, thus, given insight into the significance of methods used to reactivate BGCs from endophytes and the importance of varying techniques of their metabolomic profiling.
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    A review of the ethnomedicinal, antimicrobial, and phytochemical properties of Musa paradisiaca (plantain)
    (2021) Ajijolakewu, Kamoldeen Abiodun; Ayoola, Saheed Abiodun; Agbabiaka, Tariq Oluwakunmi; Zakariyah, Rahmat Folashade; Ahmed, Risikat Nike; Oyedele, Julius Olusegun; Sani, Al-hassan
    Background: More people—in both developing and developed countries—now use, and are favourably disposed to, traditional medicine. Musa paradisiaca (plantain) is used extensively in traditional medicine across continents. In this review, we investigated the scientifc justifcation of this extensive usage. Main body: Generally, several studies validate usage in infectious diseases, but limited antiviral and in vivo reports exist. The mechanistic elicitation of antimicrobial activity has similarly not been ascertained. Contrarily, data abound from rigorous studies on physiological conditions. Activity across categories is tied to the potent phytosterols duo of stigmasterol and β-sitosterol; and the triterpenes viz. cycloeucalenone, 24-methylene-cycloartanol, and 31-norcy clolaudenone; present in plantain. Toxicity studies, while fnite, suggest general safety and tolerance. Conclusions: Findings in the studies reviewed projects plantain as a veritable source for drug bioprospecting that will be of beneft to scientifc research and pharmaceutical industries
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    A review of the ethnomedicinal, antimicrobial, and phytochemical properties of Musa paradisiaca (plantain)
    (Springer, 2021-03-30) Ajijolakewu, Kamoldeen Abiodun
    Background: More people—in both developing and developed countries—now use, and are favourably disposed to, traditional medicine. Musa paradisiaca (plantain) is used extensively in traditional medicine across continents. In this review, we investigated the scientifc justifcation of this extensive usage. Main body: Generally, several studies validate usage in infectious diseases, but limited antiviral and in vivo reports exist. The mechanistic elicitation of antimicrobial activity has similarly not been ascertained. Contrarily, data abound from rigorous studies on physiological conditions. Activity across categories is tied to the potent phytosterols duo of stigmasterol and β-sitosterol; and the triterpenes viz. cycloeucalenone, 24-methylene-cycloartanol, and 31-norcy clolaudenone; present in plantain. Toxicity studies, while fnite, suggest general safety and tolerance. Conclusions: Findings in the studies reviewed projects plantain as a veritable source for drug bioprospecting that will be of beneft to scientifc research and pharmaceutical industries.