Stephen Oyedeji
@unilorin.edu.ng
Senior Assistant Professor, Faculty of Life Sciences
University of Ilorin
A Senior Lecturer in the Department of Plant Biology, University of Ilorin. He has taught courses in plant biology for over 10 years. He has supervised over 70 undergraduate thesis and 6 Masters thesis. He has won several awards and scholarships. He has travelled on research collaborative purposes to countries in Asia and Europe.
EDUCATION
Ph.D Botany (with specialization in Plant Ecology and Tuurfgrass Management)
M.Sc. Botany
B.Sc. Botany
RESEARCH, TEACHING, or OTHER INTERESTS
Plant Science, Ecology, Evolution, Behavior and Systematics, Agronomy and Crop Science, Agricultural and Biological Sciences
Scopus Publications
Scopus Publications
Stephen Oyedeji
BENTHAM SCIENCE PUBLISHERS
Controlled environment horticulture (also called protected structure cultivation), the concept of cultivating horticultural crops in protected structures, dates back to 14 AD. This method of cultivation offers protection to crops by regulating environmental factors (both biotic and abiotic factors) as per the crop’s requirements while reducing the incidence of pests and diseases. This chapter elucidates the diverse designs of protected structures in controlled environment horticulture, tailored to meet the growth requirements of various or specific crops. The regulations of environmental conditions (such as light, temperature, humidity, ventilation, water, nutrients, and pests) and the mechanisms of achieving optimum growing conditions are also highlighted. The huge initial investment and operational costs of controlled environment horticulture are stressed, and the need for improvement in the various designs is advocated to achieve energy sustainability while reducing costs.
Shukurat A. Iyiola, Stephen Oyedeji, and Kehinde S. Olorunmiaye
BENTHAM SCIENCE PUBLISHERS
Plants experience stress when environmental conditions are suboptimal for growth, influenced by both biotic factors (such as pests) and abiotic factors (such as salinity, drought, and nutrient deficiencies). These stresses can significantly impact plant yield and quality. In response to the challenges posed by climate change and increasing global food demands, controlled environment horticulture (CEH) has emerged as a transformative approach to mitigating plant stress. This chapter explores how CEH provides a superior alternative for managing environmental factors that limit horticultural plant growth. It will discuss the resistance traits that plants develop to cope with abiotic stress and examine the advantages and challenges associated with CEH. Additionally, the chapter will address types of growing methods in a controlled environment.
Nikita Patel, Stephen Oyedeji, and Ramar Krishnamurthy
CRC Press
Monsurat M. Kolad, Stephen Oyedeji, and Paul O. Fatoba
BENTHAM SCIENCE PUBLISHERS
Controlled environment horticulture has emerged as a modern method of protected horticulture, taking place entirely indoors without the benefit of natural sunlight. While it may seem impractical for commercial production, this approach originated from researchers aiming to systematically investigate how specific environmental factors affect plant growth and development, isolating them from uncontrolled variables that could skew results. As technology for indoor plant production has advanced, energy requirements for growing plants in fully controlled environments have significantly decreased. This evolution has led to the development of a new sector within controlled environment horticulture. This chapter explores key environmental factors—light, temperature, and humidity—highlighting their importance and how they are integrated into controlled environment practices. By understanding these factors, growers can optimize conditions to enhance plant growth and productivity in indoor settings.
Stephen Oyedeji, Nikita Patel, Ramar Krishnamurthy, and Paul Ojo Fatoba
Springer Nature Switzerland
A comprehensive exploration into the convergence of advanced plant science, engineering, and biotechnology to revolutionize food production in controlled environments. As global challenges such as climate change, population growth, and resource scarcity intensify, this book highlights the transformative potential of controlled environment horticulture (CEH) in building a more resilient and sustainable food future. The volume covers a wide range of topics, including smart greenhouse technologies, precision agriculture, vertical farming, bioreactor-based plant production, and gene-edited crops optimized for indoor systems. It integrates biological advances with technological innovations to improve yield, quality, and resource efficiency in horticultural practices. By blending plant biotechnology with environmental control strategies, the book serves as a roadmap for sustainable intensification in horticulture. Key features: Explores integration of genomics, phenotyping, and controlled environments Demonstrates the use of sensors, AI, and automation in smart horticultural systems Addresses energy-efficient lighting, water use, and nutrient management Highlights sustainability metrics and circular economy practices Provides case studies on commercial CEA models and innovation pathways
Nikita Patel, Stephen Oyedeji, David Adedayo Animasaun, Kehinde Stephen Olorunmaiye, and Ramar Krishnamurthy
CRC Press
S. Oyedeji
CRC Press
David A. Animasaun, Peter A. Adedibu, Gabriel K. Olawepo, and Stephen Oyedeji
Elsevier
S. Oyedeji, C.O. Ogunkunle, S.A. Adeniran, O.O. Agboola, and P.O. Fatoba
CRC Press
David Adedayo Animasaun, Chinaza Davies Nnamdi, Omotola I. Ipinmoroti, Stephen Oyedeji, Emmanuel A. Olonya, Ramar Krishnamurthy, and Joseph Akintade Morakinyo
Bogor Agricultural University
This study characterized, identified and conducted phylogenetic analysis on fungi contaminants in vitro bananas based on the sequence of inter-space (ITS) regions. Genomic DNA was extracted from the pure culture of fungi contaminants, amplified and sequenced using ITS1 and ITS4 markers. Analysis of the sequences using MEGA 7 Software at higher similarity sequence identified five Aspergillus spp., three Penicillium spp., one each of Fusarium, Trichoderma and Cladosporium as the contaminants. The genetic distance between the fungi species was 0.205, which suggests a homogeneous substitution between the sequences, and thiamine was the most stable. The fungi clustered in three major groups at 0.10 genetic distance, subdivided into five clusters. A cluster and sub-cluster consisting of five Aspergillus strains; a major cluster of three Penicillium strains; a cluster comprising of Fusarium chlamydosporum and Trichoderma viride; and a sole fungi Cladosporium tenuissimum. The Aspergillus group were phylogenetically related to A. flavus and A. parvissclerotigenus, the identified Penicillium spp. were closely related to Penicillium citrinum while the detected Cladosporium aligned with Cladosporium tenuissium and Phoma multirostrata. The information provided by this study could be utilized to develop a specific and compelling sterilization protocol to minimize the rate of contamination during in vitro culture procedures.
Clement O. Ogunkunle, Mariam A. Akanbi-Gada, Stephen Oyedeji, and Mayank Varun
Elsevier
CO Ogunkunle, MA Jimoh, S Oyedeji, Mayank Varun, and GO Okunlola
Elsevier
David Adedayo ANIMASAUN, Stephen OYEDEJI, Latifat Bukola MUSA, Peter Adeolu ADEDIBU, and Olabisi Fatimo ADEKOLA
University of Ljubljana
This study evaluates eleven sesame accessions in Nigeria for performance and genetic diversity using morpho-agronomic traits, chlorophyll contents and nutrient composition in a complete randomized experimental design with five replicates. The results showed ‘Igboho Black’, ‘02M’ and ‘Kenan 4’ had the best growth attributes. Although ‘NGB0090’ and ‘Exsudan’ matured early, ‘E8’, ‘Bogoro Local’ and ‘Kenan 4’ had the best yield attributes. Seeds produced were predominantly milky-white, an accession had black seeds, while three produced white seeds. Plant height positively correlated with number of leaves and leaf area as well as peduncle length. Days to 50 % flowering positively correlates with days to maturity. So also the number of capsule per plant, capsule dimension and seeds per capsule. The moisture content in seeds of the accessions was < 3.5 %, ash (4.5-5.9 %), crude protein (5.3-7.4 %), fat and oil (53.6-60.5 %), and carbohydrate < 30 %. Out of the eight components that accounted for the observed variations, the PC-1 and PC-2 contributed 65.42 %. The dendrogram revealed that ‘NGB00960’ and ‘NGB00963’ which had ‘’Kenan 4’ as a distant member are the closest relatives, while ‘NGB00390’ and ‘01M’ are the most diverse. The study concludes that the accessions are genetically and phenotypically varied and the existing diversity can be harnessed for selecting high yielding and adaptable variety for the development of improved cultivars.
S. Oyedeji, O. O. Agboola, D. A. Animasaun, C. O. Ogunkunle, and P. O. Fatoba
Springer Science and Business Media LLC
S. Oyedeji, O.O. Agboola, T.S. Oriolowo, D.A. Animasaun, P.O. Fatoba, and A.O. Isichei
Walter de Gruyter GmbH
Abstract This study assessed early-season effects of spontaneous wildfires on soil fertility and weed diversity in two managed plantations – cashew and teak – in Ilorin, Nigeria. Soil pH and nutrients in the topsoils and subsoils of burned and unburned plantations plots after a spontaneous wildfire were analysed. Species diversity and similarity were determined based on the composition and abundances of weed flora two months post-fire. The fire effects on soil nutrients and weed composition in the plantations were evaluated using the canonical correspondence analysis. Burns incidence significantly improved the organic carbon, organic matter, and Ca contents while reducing total N and Mg in both plantations. Twenty-eight weed species were distributed in 9 angiosperm families. Fire differently affected weed composition, abundance and diversity in the plantations. Burning improved soil organic carbon and organic matter contents and restricted Tephrosia bracteolata, Desmodium tortuosum, Daniellia oliveri, Senna obtusifolia and Zornia latifolia to the burned cashew plantation. The occurrence of Euphorbia heterophylla, Eriosema psoraleoides and Crotalaria retusa in the burned teak plantation was associated with a direct fire effect on soil Na and Ca contents. Burning influenced soil nutrients in the studied plantations, but weed diversity increased in the teak plantation and was reduced in the cashew plantation.
David Adedayo Animasaun, Azeez Afeez, Peter Adeolu Adedibu, Feyisayo Priscilla Akande, Stephen Oyedeji, and Kehinde Stephen Olorunmaiye
The Korean Society for Plant Biotechnology
Clement Oluseye Ogunkunle, Stephen Oyedeji, Hussein Kehinde Okoro, and Vincent Adimula
Elsevier
Oludare O. Agboola, Olusanya A. Olatunji, and Stephen Oyedeji
Informa UK Limited
ABSTRACT Evidence of the impacts of land-use change on soil biological activities, a determinant of nutrient cycling in soil, will provide a better understanding of soil health and productivity. The study investigates temporal changes in soil chemical and microbial properties in a forest converted to oil palm plantation. Soil samples from four locations: native forest and Elaeis guineensis plantations of 2-, 13- and 14-year were collected. Total carbon C and N were significantly higher (p < 0.05) in the native forest (NF) followed by 14- and 13-year E. guineensis plantations respectively. Microbial biomass carbon (MBC) and nitrogen (MBN) in NF were significantly higher (p < 0.05) than in the E. guineensis plantations. There were no significant differences in the microbial biomass phosphorus (MBP) among the E. guineensis plantation of all ages. The qCO2 in the 13- and 14-year E. guineensis plantations was higher than in NF and 2-year E. guineensis plantation. There was a positive correlation between MBC, MBN, MBP and pH, P, TC, and TN. These results indicated that conversion of native forest to E. guineensis plantation affected soil nutrient and microbial properties. And there could be a return to healthy soil condition as age of E. guineensis plantation increased.
David Adedayo Animasaun, Stephen Oyedeji, Kehinde Stephen Olorunmaiye, Musibau A. Azeez, Idowu Abdulfatah Tijani, and Joseph Akintade Morakinyo
Walter de Gruyter GmbH
Abstract The present study characterizes seed-related traits, phytochemical, physiochemical parameters and fatty acid profile of shea (Vitellaria paradoxa) seeds collected from the Kosubosu, Fufu and Sare areas of Kwara State, Nigeria to determine the effects of microclimate on seed morphology, biochemical and oil constituents. Seed morphological data were analyzed for variability. Seed oil was extracted for phytochemical constituents, physicochemical properties, and fatty acid profiling by gas chromatography equipped with mass spectrometry (GC/MS). Results showed intra and inter-locational variations in seed characters. Most fruits had 1–2 seeds. Seeds were predominantly brown and very few were dark brown. Phytochemicals and physicochemical parameters of the seed oil varied with place of collection. Alkaloid, saponin, tannin and phytate contents ranged between 0.79–0.84, 1.20–1.26, 1.48–1.56 and 0.15–0.18 mg g−1 respectively. The density of the oil was less than that of water, acid value ranged from 10.58–13.56 mg KOH g−1 and iodine values were between 36.63 to 40.32 g I2 (100 g)–1. Saponification values lie between 160.39 and 184.14 mg KOH g−1; and free fatty acid was within 5.32–6.81 %. Peroxide, ɑ-tocopherol, total phenol and oxalate values as well as viscosity of the oil also varied; however, refractive index was similar. Ethyl oleate and octadecanoic acids were present and most abundance in all the locations, while glycidol stearate was only found in Fufu samples with three other fatty acids. Five fatty acids were present in Kosubosu, while Sare had only two. The results obtained in the present study indicate that shea oil could be used for medicinal, nutritional and industrial purposes. Since seed characters, phytochemical, physicochemical and fatty acid compositions varied with the microclimate, environmental and micro-ecological conditions should be considered when collecting seeds for oil utilization.