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Articles 1 - 11 of 11
Full-Text Articles in Botany
Modelling Pollinator And Nonpollinator Selection On Flower Colour Variation, Brigitte Tenhumberg, Agnes S. Dellinger, Stacey D. Smith
Modelling Pollinator And Nonpollinator Selection On Flower Colour Variation, Brigitte Tenhumberg, Agnes S. Dellinger, Stacey D. Smith
School of Biological Sciences: Faculty Publications
1. Flower colour variation is ubiquitous within and between populations, which is why it has long been a focal point for studies of natural selection. This body of work has uncovered a wide range of selective agents, including pollinators, herbivores, and various abiotic factors. Nevertheless, we lack an integrative framework for predicting the phenotypic outcome in terms of floral pigmentation when these forces act collectively and often in opposition. 2. We here present such a framework through a model that incorporates selection on pigmentation at the vegetative phase (i.e., through survival to reproduction) and at the flowering phase (i.e., on …
Quantitative Analysis Of Phytochemical Compounds In Barks And Leaves Of Okoubaka Aubrevillei Collected From Iwo, Southwestern Nigeria, Oluwatoyin Opeyemi Akintola, Adeboyin Funmi Aderounmu, Isaac Oluwaseyi Abiola, Kolawole Emmanuel Abodurin, Tunde Adeniran, Festus Agboola, Oluwayemisi Samuel Olokeogun
Quantitative Analysis Of Phytochemical Compounds In Barks And Leaves Of Okoubaka Aubrevillei Collected From Iwo, Southwestern Nigeria, Oluwatoyin Opeyemi Akintola, Adeboyin Funmi Aderounmu, Isaac Oluwaseyi Abiola, Kolawole Emmanuel Abodurin, Tunde Adeniran, Festus Agboola, Oluwayemisi Samuel Olokeogun
Journal of Bioresource Management
Okoubaka aubrevillei is an indigenous and sacred tropical tree in Africa. It is rare with allelopathic properties and has relatively little information available in terms of what is responsible for its usage for medicinal and traditional usage. The phytochemical screening and quantitative analysis of the compounds in the barks and leaves of Okoubaka aubrevillei was determined to ascertain and establish its earlier claimed usage as traditional and modern medicine. The most important classes of secondary metabolites (phytochemical compounds) specifically alkaloids, flavonoids, tannins, saponins, anthraquinnes, mucilages, oses, holosides, coumarin and glycosides were detected in both, the leaves and barks of the …
Strawberry Cultivars Vary In Productivity, Sugars And Phytonutrient Content When Grown In A Greenhouse During The Winter, Ellen T. Paparozzi, George Meyer, Vicki Schlegel, Erin Blankenship, Stacy A. Adams, M. Elizabeth Conley, Benjamin A. Loseke, Paul Read
Strawberry Cultivars Vary In Productivity, Sugars And Phytonutrient Content When Grown In A Greenhouse During The Winter, Ellen T. Paparozzi, George Meyer, Vicki Schlegel, Erin Blankenship, Stacy A. Adams, M. Elizabeth Conley, Benjamin A. Loseke, Paul Read
Department of Agronomy and Horticulture: Faculty Publications
In many areas of the US, fresh locally grown berries are not available during the winter. With this in mind, a research study comprised of three experiments was conducted focused on cultivar selection for berry yield, number, sweetness and phytonutrient content. Using a capillary mat system with under bench heating within a double-layer polyethylene greenhouse, strawberries were grown in the Great Plains Region of the US during the winter. During experiment 1, 12 cultivars were grown; berries were weighed, counted and analyzed for sugars and phytonutrients. “Albion” plants produced a high number/mass of berries, had relatively high sugar content but …
Antimicrobial And Antiinsectan Phenolic Metabolites Of Dalea Searlsiae, Gil Belofsky, Mario Aronica, Eric Foss, Jane Diamond, Felipe Santana, Jacob Darley, Patrick F. Dowd, Christina M. Coleman, Daneel Ferreira
Antimicrobial And Antiinsectan Phenolic Metabolites Of Dalea Searlsiae, Gil Belofsky, Mario Aronica, Eric Foss, Jane Diamond, Felipe Santana, Jacob Darley, Patrick F. Dowd, Christina M. Coleman, Daneel Ferreira
All Faculty Scholarship for the College of the Sciences
Continued interest in the chemistry of Dalea spp. led to investigation of Dalea searlsiae, a plant native to areas of the western United States. Methanol extractions of D. searlsiae roots and subsequent chromatographic fractionation afforded the new prenylated and geranylated flavanones malheurans A–D (1–4) and known flavanones (5 and 6). Known rotenoids (7 and 8) and isoflavones (9 and 10) were isolated from aerial portions. Structure determination of pure compounds was accomplished primarily by extensive 1D- and 2D-NMR spectroscopy. The absolute configurations of compounds 1–5, 7 …
Phenological Variations Of Polyphenols In Smilax Campestris (Smilacaceae), Ana Zulema Rugna, Alberto Angel Gurni, Marcelo Luis Wagner
Phenological Variations Of Polyphenols In Smilax Campestris (Smilacaceae), Ana Zulema Rugna, Alberto Angel Gurni, Marcelo Luis Wagner
Turkish Journal of Botany
Polyphenol profiles can suffer quali-quantitative modifications as the plant modifies its phenological condition. The objective of this work was to determine if there is a rhythm of production in the synthesis of polyphenols according to the phenological condition in the leaves, roots, and rhizomes of Smilax campestris Griseb. The plant material analysed corresponded to individuals of a colony of S. campestris collected in different phenological conditions. Standard methodology was used for the chromatographic profiles of flavonols (kaempferol, quercetin, isorhamnetin, and their glycosides) and proanthocyanidins (procyanidin and propelargonidin) and quantification of total phenol, condensed tannins, and flavonols. Appearance of metabolic changes …
Air Pollution Effects On Flavonoids In Pollen Grains Of Some Ornamental Plants, Farkhondeh Rezanejad
Air Pollution Effects On Flavonoids In Pollen Grains Of Some Ornamental Plants, Farkhondeh Rezanejad
Turkish Journal of Botany
Phenolic compounds function as stress indicators because they accumulate to high levels in many plant tissues in response to a wide range of biotic and abiotic signals. These compounds are involved in pollen development, pollination, pollen germination, and pollen tube growth. The mature pollen grains of Spartium junceum L., Lagerstroemia indica L., Thuja orientalis L., and Petunia hybrida L. collected from control (less polluted) and polluted areas [mainly SO_2, NO_2, CO, hydrocarbons (HC), and airborne particulate material (APM)]. The ethanolic aquatic extracts of pollen grains were prepared. The extracts were analysed by high pressure liquid chromatography (HPLC). HPLC analysis demonstrated …
The Structure And Ultra Structure Of Anther Epidermis And Pollen In Lagerstroemia Indica L. (Lythraceae) In Response To Air Pollution, Farkhondeh Rezanejad
The Structure And Ultra Structure Of Anther Epidermis And Pollen In Lagerstroemia Indica L. (Lythraceae) In Response To Air Pollution, Farkhondeh Rezanejad
Turkish Journal of Botany
The structure of the anthers and pollen of Lagerstroemia indica L. (crepe myrtles) (Lythraceae) in samples collected from clean and polluted areas was studied by OM, SEM, and TEM. The epidermal cells of the anthers enlarged during anther development. Their cuticle content increased and became thick and folded. The cytoplasm of epidermal cells was peripheral and degenerated in mature anthers. At this time, their major content was phenolic compounds. The epidermal cells in the anthers collected from polluted areas were shrunken, fragile, and burned at the tip, compared to those collected from non-polluted areas. Flavonoid stainability was greater in the …
Phytochemical Profile Of Hydrostachys Insignis (Hydrostachyaceae), Ron Scogin
Phytochemical Profile Of Hydrostachys Insignis (Hydrostachyaceae), Ron Scogin
Aliso: A Journal of Systematic and Floristic Botany
Foliar material of Hydrostachys insignis contains kaempferol 3-glucoside and kaempferol 3-sophoroside. Iridoids, proanthocyanidins, acteoside, alkaloids, hydrolyzable tannins (ellagic acid), cyanogenic glycosides, and saponins could not be detected. This chemical profile does not support proposed relationships between Hydrostachyaceae and either Podostemaceae or members of the Scrophulariales. It is proposed that the chemical profile of Hydrostachyaceae reflects phylogeny, not convergence to an aquatic habitat; but the profile does not suggest any accurate systematic alignment of Hydrostachyaceae.
Follar Flavonoids Of Keckiella Ternata, Ron Scogin
Follar Flavonoids Of Keckiella Ternata, Ron Scogin
Aliso: A Journal of Systematic and Floristic Botany
The major foliar phenolics of Keckiella ternata are quercetin 3-O-glucoside, kaempferol 3-O-glucoside, and acteoside (= orobanchin). The occurrence of flavonols in K. ternata is anomalous compared with other species of Keckiella and Penstemon, in which leaf flavonoids are based on luteolin and 6-hydroxyluteolin. The occurrence of foliar flavonols in K. ternata is interpreted as an advanced, derived condition.
Foliar Flavonoids Of Camellia Chrysantha (Theaceae), Rob Scogin
Foliar Flavonoids Of Camellia Chrysantha (Theaceae), Rob Scogin
Aliso: A Journal of Systematic and Floristic Botany
Foliar flavonoids of Camellia chrysantha consist of two flavone C-glycosides which have chromatographic and spectroscopic properties very similar to corymboside and isocorymboside. The lack of detectable foliar flavonol glycosides contrasts with their presence in flowers of this species and may be anomalous within the genus Camellia.
Floral Pigments Of The Yellow Camellia, Camellia Chrysantha (Theaceae), Ron Scogin
Floral Pigments Of The Yellow Camellia, Camellia Chrysantha (Theaceae), Ron Scogin
Aliso: A Journal of Systematic and Floristic Botany
Floral pigments of Camellia chrysantha consist of three flavonoids (quercimeritrin, rutin, and isoquercitrin) and two xanthophylls (neoxanthin and an unidentified xanthophyll). The transfer of yellow petal coloration from C. chrysantha to other Camellia species may be hampered by interspecific genetic incompatibilities and by the complexities of genetic regulation of biosynthesis of the pigments involved.