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2020, Notulae Scientia Biologicae
Stipe anatomy of seven Pteris species collected from various locations in the Southwestern Nigeria was investigated. This was with a view to identify characters of the stipe anatomy that are important in delimiting the species. Transverse sections (TS) of stipe at proximal median and distal regions were cut with the aid of a Reichert Austria sledge microtome at 10 µ thickness. Sections were stained in Safranin O for five minutes, rinsed in three successive changes of water and counterstained in Alcian blue for five minutes. The counterstained sections were rinsed in three changes of water, and then treated in serial grades of alcohol. Observation of prepared slides was made under light microscope. Based on the shape of the vascular bundles, the Pteris species fall into three categories which are inverted Omega, V or U shapes. The adaxial grooves varied from proximal to distal regions in all the species except in P. ensiformis where it was uniform throughout the regions.
Anales de Biología
Foliar and petiole anatomy of Pterygota (Sterculioideae; Malvaceae) species and their distribution in Nigeria2017 •
Se estudió la anatomía foliar y del peciolo de especies de Pterygota de Nigeria, proveyendo información sobre su distribución en el área. Principalmente están distribuidas por el sur de Nigeria, especialmente en zonas más húmedas. Los microcaracteres foliares muestran que las especies son hiposteomátcas y generalmente paracíticas, más abundantes en P. berquaertii, con un promedio de 115/mm2, que en P. macrocarpa, con 59/mm². Las células epidérmicas son irregulares, rectangulares y poligonales. El peciolo esférico con epidermis uniseriada; la distribución celular varia desde solitarias a radiales múltiples. Este estudio ha proporcionado importante información sobre las especies indígenas. Son necesarios estudios posteriores para comprender grado y tiempo de evolución independiente de las especies en Nigeria. Leaf and petiole anatomy of Pterygota species in Nigeria were studied and their distribution within the area is also reported, following outlined standard protocols. They are chi...
The study was carried out to investigate the taxonomic occurrence of Pteridophytes in Lafia and Doma Metropolis of Nasarawa State, Nigeria. A total of 16 locations were sampled in Lafia and Doma respectively. These locations include wetlands, swamps, forest shade and trees. From these locations, ferns were collected, pressed and identified. Their relative abundances in each location were calculated and their ethnobotanical uses by the local dwellers were documented using structured questionnaires. Ferns were observed only in 12 locations in Lafia and nine locations in Doma. Seven species of ferns were identified namely, Pneumatopteris afra, Nephrolepis biserrata, N. undulata, N. cordifolia, Adiantum capillus-veneris, Adiantum sp. and Pityrogramma calomelanos. Pneumatopteris afra was found to be the most widely distributed fern. Of the ferns observed, terrestrial ferns had the highest occurrence (85.7%) in Lafia with only 50% in Doma. Pneumatopteris afra was found to have the highest relative frequency while Nephrolepis biserrata and N. undulata had the lowest relative frequency in Lafia and Doma. All these species have been reported by the local dwellers to have ethnobotanical uses such as in the treatment of ulcer, fever, typhoid, chest pain, stomach pain and diabetes. Also, Pityrogramma calomelanos had the highest percentage awareness by the local dwellers. It is concluded that Lafia is more rich and diverse in fern species than Doma. Locations where ferns were absent are due to the long-term alterations in the microclimatic conditions by various human activities in those places. Fern gazette 20(7): 245-254
Journal of Medicinal Plants Studies
Comparative systematic leaf and petiole anatomical studies of the genus Stachytarpheta found in Awka Nigeria2015 •
Investigations on the anatomical features of the leaf and petiole of three species of Stachytarpheta (S.angustifolia, S.cayannensis and S.jamaicensis) that were common in Awka, South East Nigeria was made with the aid of a light microscope. Anatomical significant features were found in the leaf and petiole. The leaves and petioles were dorsiventral. The epidermis was conspicuous but one cell thick. The epidermal cells in the leaves were not of uniform size in both surfaces. Chlorenchyma was present as a very narrow portion of the leaves and petiole tissue while the palisade layer was one to three cells thick. These features however, could not proffer any taxonomic relevance to the delimitation of any of the species in this genus.
Journal of Threatened Taxa
Pteris geminata Wall. ex J. Agardh (Pteridaceae): a Critically Endangered Pteridophyte in India2019 •
Pteris is the largest genus of the family Pteridaceae in India. Ambiguities persist about statuses of type specimens of some species of Pteris in India. Protologues and original material were consulted to provide unambiguous applications of names. As a result, ten species of Pteris are lectotypified here.
2016 •
Ferns make up an important component of tropical pteridoflora and serve important functions in ecosystem processes. The relative occurrence and distribution of ferns within the wetland area of Lagos and Osun States were studied with the aim of documenting the pteridophytic flora and habit in these areas. Four non-contiguous quadrats of 10 m x 10 m were established in each of the five study sites in consideration of the distribution pattern of the plants to be sampled. Non-random selective method was also adopted where the quadrats were preferentially located by sight to ensure that at least one individual pteridophyte was present in each quadrat. After sampling, the species were subsequently identified using reference collections at the herbaria of Forest Research Institute of Nigeria (FRIN) Ibadan, Oyo State and University of Lagos. A total of 16 species of ferns belonging to 11 genera and 9 families were recorded. On their distribution, the two study sites in Osun State recorded t...
Tacca leontopetaloides is the only species in the genus Tacca naturally distributed in the Guinea savannah and dry rainforest regions in Nigeria. The study was conducted to contribute to scientific knowledge on the macro-morphological and anatomical features of the plant collected from 4 locations (Akoko, Eruwa, Bazza and Ile-Ife) across the Nigeria. Leaf epidermal peel of the 4 samples, leaf and stem Transverse Sections (T.S) and stem Tangential Longitudinal Section (T.L.S) and Radial Longitudinal Section (R.L.S) as well as stem fibres were prepared and studied. A wide range of similarities and differences were noted in the anatomical features of the 4 samples studied. The similarities include, but not limited to stomata being anomocytic, epidermis hypostomatic, cuticle single-layered and striated, vascular bundles conjointed collateral, epidermis undulating, stem rays uniserrate and procumbent, stem fibres non-septate and non-storeyed. Wide range of variations are noted in stomata density and measurements, epidermal cell density, guard cell measurements, cuticle thickness, vascular bundle arrangement, shapes of parenchyma and sclerenchyma cells and many other anatomical features. The variations observed among the samples studies were attributed to the prevailing environmental factors in each collection site.
2017 •
An Asia-Pacific fern species Pteris terminalis, formerly known as ‘Pteris excelsa’ is variable in terms of frond morphology as well as cytological characters. In particular, the results of previous cytological studies raised question on naturalness of currently accepted infraspecific taxa—‘P. excelsa var. simplicior’ (not yet combined with P. terminalis) consists of apogamous diploid and triploid, but these cytotypes are shared by the typical form of ‘P. excelsa’ (= P. terminalis), which is most widely distributed as sexual diploid. In the present study, the two varieties are re-circumscribed chiefly based on reproductive modes. Morphological characters including the length of apical pinna segments and the dissection degree of acroscopic side of pinna often, but not always, help their identification. After examination and lectotypification of type specimens of related taxa, correct names at varietal rank, two varieties P. terminalis var. terminalis and P. terminalis var. fauriei are...
Journal of Molecular Biology
Crystal Structure of a Truncated Mutant of Glucose-Fructose Oxidoreductase Shows that an N-terminal Arm Controls Tetramer Formation2000 •
Yohana PZ Ribka
Nama : Yohana Penina Zefanya Ribka Tugas : Laporan Bacaan2021 •
2021 •
Revista Psicologia: Organizações e Trabalho
Criatividade, inovação e características da tarefa em empresas juniores: estudos de casos múltiplos2019 •
JOURNAL OF CLINICAL AND DIAGNOSTIC RESEARCH
Chronic Gastric Volvulus – Diagnosed from Endoscopy2017 •
Applied Physics Letters
Experimental realization of superconducting quantum interference devices with topological insulator junctions2012 •
Physical Science International Journal
Analysis of the Simulation Results of Three Carbon Dioxide (CO2) Cycle Models2020 •
PROYECTO: REACTÍVATE “IMPULSO JOVEN”
PROYECTO: REACTÍVATE “IMPULSO JOVEN”2011 •
2014 •
Fibrinolysis
Biochemical characteristics and polarized expression of the u-PA receptor at the cell surface1989 •
2012 •
American Journal of Plant Sciences
Damage Caused by Psyllids and Influence of Climatic Factors in Brazilian Accesses of Guava Trees Cultivated in Organic System2014 •
Domestic Animal Endocrinology
Understanding the influence of trenbolone acetate and polyamines on proliferation of bovine satellite cells2020 •
Archives of Disease in Childhood
Can TEN4 distinguish bruises from abuse, inherited bleeding disorders or accidents?2021 •
European Journal of Business and Management
The Impact of Work-Family Conflict on Continuance Commitment under the Mediation of Emotional Exhaustion and the Role of Social Support as Moderator: Among Academic Staff2016 •
Molecular Therapy
Functional Correction of Fanconi Anemia Group C Hematopoietic Cells by the Use of a Novel Lentiviral Vector2001 •
Transplantation Proceedings
Liver transplantation for small hepatocellular carcinoma in cirrhosis: analysis of our experience2001 •
2014 •
International Journal of Molecular Sciences
Drosophila as a Model Organism to Study Basic Mechanisms of Longevity2022 •
Egyptian Academic Journal of Biological Sciences. A, Entomology
Molecular Identification of Thripids Attacking Olive Groves at Ismailia, Egypt2017 •