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A review on the ambit and prospects of C_3 and C_4 plants in Nigeria

Research in Cold and Arid Regions 2017年第6期9卷 587-598页

作者： Abdulwakeel Ayokun-nun Ajao oludare oladipo agboola Sefiu Adekilekun Saheed Department of Botany Obafemi Awolowo University Department of Botany and Plant Biotechnology University of Johannesburg Department of Botany University of Lagos

Despite the enormous applications of photosynthesis in global carbon budget and food security, photosynthesis research has not been adequately explored as a research focus in Nigeria. Previous works on C3 and C4 plants in Nigeria were mainly on the use of anatomical characteristics to delimit plant species into their respective pathways, with no attention being paid to its applications. In this review, past and present knowledge gaps in this area of study are elucidated. Information used in this review were sourced from referred research articles and books in reputable journals. The results revealed that C3 and C4 plants are distributed among 21 genera and 11 families in Nigeria. In addition there is dearth of informatio such that only three genera have been classified based on diverse photosynthetic pathways with no information found on the physiological and biochemical characterization of these genera. Moreover, further research is also suggested for tackling new challenges in the area of food productivity and climate change.

关键词： biofuel bundle shealth climate change Kranz tissue mesophyll

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Chemical composition and antimicrobial activities of essential oil extracted from Tithonia diversifolia(Asteraceae)flower

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Journal of Bioresources and Bioproducts 2016年第4期1卷 169-176页

作者： oludare O.agboola Stephen Oyedeji Joshua O Olowoyo Abdulwakeel Ajao oladipo Aregbesola Department of Biology Sefako Makgatho Health Sciences UniversityPretoriaSouth Africa. Department of Botany University of LagosAkokaYabaLagos StateNigeria. Department of Plant Biology University of IlorinIlorin240003 Nigeria. Department of Botany Obafemi Awolowo UniversityIle-IfeOsun StateNigeria Department of Microbiology Obafemi Awolowo UniversityIle-IfeOsun StateNigeria

The upsurge in the prevalence of side effects of many synthetic antimicrobial agents and incidence of multidrug resistant bacteria has spurred scientists on the search for plant based antimicrobial of therapeutic *** study extracted essential oils from the flowers of Tithonia diversifolia(Hemsl)***(Mexican sunflower)and assayed it for antimicrobial *** oils were extracted(hydro-distillation),characterized(GC-MS)and tested for antibacterial and antifungal activities.α-Pinene(34.42%),β-Caryophyllene(22.34%),β-Pinene(11.14%),Germacrene-D(11.13%)and 1,8-Cineole(8.76%)were the major constituents of the forty-five compounds *** characterized compounds were general monoterpenes(44.44%),sesquiterpenes(26.67%),including alcohols and aldehydes which accounted for 28.89%.The extract concentrations of 8-120 mg/ml in Potato Dextrose Agar(PDA)medium effectively inhibited the tested fungi in *** 5 mg/ml,only Bacillus megaterium and Bacillus cereus were inhibited of all gram-positive bacteria while Streptococcus pyrogens was *** gram-negative bacteria were *** inhibition of the gram-positive and gram-negative species increases with increased concentration of the essential *** 40 mg/ml,all the tested bacteria species were inhibited and the growth inhibition for the species followed the order;***>Proteus mirabi>Bacillus megaterium>Klebsiella pneumonia>Bacillus cereus>*** oil concentration of 72 mg/ml totally inhibited the growth of all three fungal species-Cochliobolus lunatus,Fusarium solani,Fusarium *** secondary metabolites in the oil of *** proved effective against the tested bacteria and fungi *** finding of this study unlocks the potentials of this essential oil of Mexican sunflower for bio-pesticide production.

关键词： Essential oils Flower Gas chromatography Monoterpenes Sesquiterpenes

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Genetic variation and cryptic lineage diversity of the Nigerian red-headed rock agama Agama agama associate with eco-geographic zones

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Current Zoology 2019年第6期65卷 713-724页

作者： Lotanna M.NNEJI Adeniyi C.ADEOLA Fang YAN agboola O.OKEYOYIN Ojo C.oladipo Yohanna SAIDU Dinatu SAMUEL Ifeanyi C.NNEJI Akindele O.ADEYI Abiodun B.ONADEKO Temidayo E.OLAGUNJU Olatunde OMOTOSO Segun O.oladipo Oluyinka A.IYIOLA John Y.USONGO Timothy AUTA Abbas D.USMAN Halima ABDULLAHI Odion O.IKHIMIUKOR Wei-Wei ZHOU Jie-Qiong JIN Obih A.UGWUMBA Adiaha A.A.UGWUMBA Min-Sheng PENG Robert W.MURPHY Jing CHE State Key Laboratory of Genetic Resources and Evolution Kunming Institute of ZoologyChinese Academy of SciencesKunming 650223China Sino-Africa Joint Research Center Chinese Academy of SciencesKunming 650223China National Park Service Headquarters Federal Capital TerritoryAbuja 900001Nigeria Old Oyo National Park Oyo State 211242Nigeria Gashaka Gumti National Park SertiTaraba State 663101Nigeria Department of Biological Sciences University of AbujaFCTAbuja 902101Nigeria Department of Zoology University of IbadanIbadanOyo State 200284Nigeria Department of Zoology University of LagosLagos 100213Nigeria Department of Biosciences and Biotechnology Kwara State UniversityMaleteKwara State 241104Nigeria Department of Zoology Faculty of Life SciencesUniversity of llorinllorinKwara State 240103Nigeria Department of Zoology Modibbo Adama University of TechnologyYola 640101Nigeria Department of Biological Sciences Federal University Dutsin-MaKatsina State 821Nigeria Department of Biology Kashim Ibrahim College of EducationMaiduguriBorno State 600230Nigeria Department of Microbiology University of IbadanIbadanOyo State 200284Nigeria Centre for Biodiversity and Conservation Biology Royal Ontario MuseumTorontoOntarioCanada M5S 2C6

Nigeria is an Afrotropical region with considerable ecological heterogeneity and levels of biotic *** its vertebrate fauna,reptiles have broad distributions,thus,they constitute a compelling system for assessing the impact of ecological variation and geographic isolation on species *** red-headed rock agama,Agama agama,lives in a wide range of habitats and,thus,it may show genetic structuring and ***,we tested the hypothesis that ecology affects its genetic structure and population *** inference phylogenetic analysis of a mitochondrial DNA(mtDNA)gene recovered four well-supported matrilines with strong evidence of genetic structuring consistent with eco-geographic *** differences among populations based on the mtDNA also correlated with geographic distance. The ecologicalniche model for the matrilines had a good fit and robust performance. Population divergence alongthe environmental axes was associated with climatic conditions, and temperature ranked highestamong all environmental variables for forest specialists, while precipitation ranked highest for theforest/derived savanna, and savanna specialists. Our results cannot reject the hypothesis that nicheconservatism promotes geographic isolation of the western populations of Nigerian A. ***, ecological gradients and geographic isolation impact the genetic structure and population divergenceof the lizards. This species might be facing threats due to recent habitat fragmentation,especially in western Nigeria. Conservation actions appear necessary.

关键词： Agama agama ecological speciation genogeography Nigeria population divergence vegetation

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