ADEBAJO SEUN OWOLABI
@funaab.edu.ng
MICROBIOLOGY
FEDERAL UNIVERSITY OF AGRICULTURE, ABEOKUTA
EDUCATION
B SC. (MICROBIOLOGY)
M.SC. (ENVIRONMENTAL MICROBIOLOGY)
PH.D (ENVIRONMENTAL MICROBIOLOGY)
Scopus Publications
Scholar Citations
Scholar h-index
Scholar i10-index
Scopus Publications
Paul Olusegun Bankole, Victor Taghoghor Omoni, Chidinma A. Tennison-Omovoh, Seun Owolabi Adebajo, and Sikandar Imamsab Mulla
Elsevier BV
S.O. Adebajo, P.O. Bankole, A.E. Ojo, A.T. Ajibola, C.O. Ojesola, and A.K. Akintokun
Elsevier BV
Seun O. Adebajo, Abidemi E. Ojo, Paul O. Bankole, Abiola O. Oladotun, Pius O. Akintokun, Emmanuel O. Ogunbiyi, and Anuoluwapo Bada
Informa UK Limited
Seun Owolabi Adebajo, Folasade Oluwatobi, Pius Olugbenga Akintokun, Abidemi Esther Ojo, Aderonke Kofoworola Akintokun, and Ige Samuel Gbodope
Springer Science and Business Media LLC
AbstractTomato is beneficial to human health because it contains valuable vitamins such as vitamins A, C and several minerals. However, to meet up with the demands of the ever increasing population, there is need to improve tomato production. This research, thus, investigated the impact of rice-husk biochar on the agronomic performances of tomato plant and microbial biomass of carbon, nitrogen and phosphorus in different tomato growth stages. The rice husk biochar pyrolyzed at 350 °C was amended with soil at four different application rates: 0, 2.5, 5.0 and 7.5 t/ha. Physicochemical property of soil was conducted using Mid Infrared Reflectance Spectroscopy method. Impact of biochar on Microbial Biomass Carbon, Microbial Biomass Nitrogen and Microbial Biomass Phosphorous was conducted using fumigation extraction method and monitored at three functional stages. Biochar application appreciably increase the soil physicochemical properties such as pH, Ca, Na, H+, S, P, B, C, Zn and cation exchangeable capacity in comparison with the control. Biochar amended soil significantly enhanced tomato height, stem girth, leaf area, flowers, fruit yields and weight. Although, B3 recorded the lowest leaf area, it possessed the highest number of fruits and fruit weight of 3 and 40%, respectively. The ratio of Microbial biomass C:N:P for biochar amended soil at 7.5 t/ha (B3) was 302.30:18.81:11.75 µg/g, compared to control, which was 242.12:18.30:11.49 µg/g. This study revealed that biochar amendments significantly (p < 0.05) increased the yields and microbial biomass of tomato plants. Conclusively, the application of rice-husk biochar (7.5 t/ha) to soil is considered as a suitable approach to improve tomato growth and yield.
Paul Olusegun Bankole, Victor Taghoghor Omoni, Chidinma Angela Tennison-Omovoh, Seun Owolabi Adebajo, Sikandar Imamsab Mulla, Adedotun Adeyinka Adekunle, and Kirk Taylor Semple
Elsevier BV
Paul Olusegun Bankole, Victor Taghoghor Omoni, Sikandar Imamsab Mulla, Seun Owolabi Adebajo, and Adedotun Adeyinka Adekunle
Elsevier BV
Abidemi Ojo, Seun Adebajo, kolapo Fasina, Bolutife Odejinmi, Olugbenga Ojo, abiola Ooladotun, and JOSHUA Ibeaha
Egypts Presidential Specialized Council for Education and Scientific Research
Background: Carbapenem-resistant Enterobacteriaceae (CRE) pose a great threat to the public health sector as a result of its high communicability, high morbidity and mortality rates. This study investigated the occurrence of carbapenem resistant Enterobacteriaceae and the prevalence of Klebsiella pneumoniae Carbapenemase (KPC) producing Klebsiella pneumoniae as a mechanism of resistance. Method: One hundred and ten Enterobacteriaceae isolates were cultured from different samples of patients in Intensive Care Units of two hospitals. Using Clinical and Laboratory Standards Institute (CLSI) Guidelines of 2017. Carbapenemase production was determined phenotypically using Brilliance CRE agar, Carbapenem Inactivation Method and confirmed with Modified hodge test (MHT). MHT positive isolates were screened for KPC-producing Klebsiella pneumoniae using Boronic acid-based inhibition test. Result: Phenotypic results revealed an occurrence of 10.9% (12/110) isolates for carbapenem resistant Enterobacteriaceae while KPC-producing Klebsiella pneumoniae prevalence was 3.6% contributing 33.3% to the burden of carbapenem production. The occurrence of carbapenem-resistant Enterobacteriaceae in this study was relatively high and KPC-Klebsiella pneumoniae had a significant contribution to the burden of CRE. Conclusion: Hence, a sinewy antibiotic stewardship is needed in this regard.
Abidemi E. Ojo, Seun O. Adebajo, Pius O. Akintokun, Abiola T. Oladotun, Abdulwasiu O. Sakariyau, and Dolapo Aruna-Ogun
Informa UK Limited
Abstract Incorporation of compost amendments into the soil is a promising strategy for the control of some soil-borne plant diseases. The aim of this study was to evaluate the effect of compost amendments from Tridax procumbens L. and cow dung on the microbial activity and agronomic traits of tomato plants infested with Ralstonia solanacearum. Tridax procumbens L. and cow dung were composted for 20 days using five different proportions. Physicochemical properties and microbial load of the composts were determined using the standard methods. Isolates were identified based on morphological, colonial and biochemical characterisations. Different compost concentrations were added to sterile soil with and without Ralstonia solanacearum after which tomato nurseries were transplanted. Agronomic parameters such as plant height, number of leaves, stem girth and leave area were determined after two and four weeks of transplanting. Cow dung only (CD) had the highest Total Bacterial Count (TBC) and Total Fungal Count (TFC) of 265.67 x 104 CFU/g and 92.3 x 103 CFU/g respectively while T. procumbens only (TP) had the least TBC (46.3 x 104 CFU/g) and TFC (13.33 x 103 CFU/g) . Bacillus species, Pseudomonas species, Aspergillus species and Penicillium sp. were predominant throughout the duration of composting. Highest pH (7.3) was recorded by Cow dung + T. procumbens (C:T)(1:1) while TP had the least pH (6.2). Highest temperature (41.9 °C) was recorded by C:T(1:2) while TP recorded the least 29.8 °C. After four weeks, the compost amendments improved the plant height, number of leaves, stem girth, and leaf area in the un-infested and diseased tomato plants. This study showed that compost from T. procumbens and cow dung can be used to improve the growth of tomato and also suppress bacterial wilt of tomato.
S. O. Adebajo, P. O. Akintokun, A. E. Ojo, A.K. Akintokun, and O.A. Badmos
Informa UK Limited
ABSTRACT Biochar is a stable solid material made from biomass via pyrolysis and can endure in soil for thousands of years. The present study aimed to evaluate the potential of rhizospheric microorganisms in rice-husk and poultry waste biochar-amended soil for biosurfactant production. Rhizospheric microorganisms in biochar-amended soil were isolated and screened for biosurfactant production using different screening methods. Potential rhizospheric bacteria was used to produce biosurfactant using different recovery techniques and its hydrocarbon degrading efficiency was determined. A total of 41 rhizospheric bacteria were recovered from biochar-amended soil. Pseudomonas and Bacillus spp were the dominant isolates. Pseudomonas putida showed best biosurfactant potential isolates from the different screening results and was used to produce biosurfactant. Chloroform-methanol showed good recovery solvent for biosurfactant extraction. Chloroform/methanol (2:1) gave the highest quantity (3.15 ± 0.26) g/L of biosurfactant while ethyl acetate produced the least yield of biosurfactant (1.13 ± 0.82) g/L. Pseudomonas putida also showed the potential to degrade hydrocarbon over a period of 10 days. The results obtained revealed that potential isolates for biosurfactant production and efficient hydrocarbon degraders could be recovered from rice-husk and poultry waste biochar-amended soil.
Seun O. Adebajo, Aderonke K. Akintokun, Abidemi E. Ojo, Dami M. Egbagbe, Pius O. Akintokun, and Lawrence O. Adebajo
Environmental Research Institute, Chulalongkorn University
Microbial-derived surface-active compounds (biosurfactants) have attracted attention due to their low toxicity, cost-effectiveness, biodegradable nature and environment compatibility. Due to paucity of knowledge in the production of biosurfactant by microorganisms from other sources such as biochar-amended soil, the present study investigates the potential of rhizospheric bacteria isolated from biochar amended soil of okra plant in the production of biosurfactants using different recovery techniques. Rhizospheric bacteria were screened for biosurfactant production using Haemolytic, Oil spreading, Drop collapse, Methylene blue method, Bacterial adhesion to hydrocarbon and Emulsification activity. The biosurfactant was extracted using different extraction solvents (acid precipitation, ethyl acetate, acetone, dichloromethane and chloroform/methanol). Degradation of hydrocarbon (diesel) was determined spectrophotometrically. A total of twenty-three rhizospheric bacteria were isolated from the soil of Abelmoschus esculentus (okra plant). Nine isolates were positive for haemolysis with values between 1.1±0.2 mm by Enterobacter cloaca and 23.0±0.6 mm by Alcaligenes faecalis. Two isolates were positive for the drop collapse test. Only one isolate was positive for the methylene blue method. In the oil spreading test, ten isolates were positive and five isolates had the ability to adhere to hydrocarbons. Six isolates exhibited emulsification potential after 24 h, with the highest and lowest (65.9%) and (40.7%) recorded by Alcaligenes faecalis and Citrobacter sp, respectively. The biosurfactant produced by Alcaligenes faecalis using different recovery solvents showed that chloroform and methanol are the best extraction solvents and Alcaligenes faecalis was also able to degrade diesel oil over a period of 10 d. Conclusively, Alcaligenes faecalis recovered from soil amended sawdust biochar of okra plant is both a potent biosurfactant producer and an agent for remediating hydrocarbon-contaminated soil environments.