Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 416 for “"Floral"”.
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Floral induction in Brachypodium distachyon
… presented examines some of the rudiments of the floral induction in Brachypodium distachyon and, hopefully, will constitute a modest, yet relevant, contribution to the plant research community, on the reproductive development of temperate monocots.
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Tracking Floral Visitation Using DNA Barcodes
<p>Floral visitation resulting in interspecific pollen transfer (IPT) from non-native or invasive plant species can affect the reproductive fitness of native plant species through pollen allelopathy, stigma clogging, stylar clogging, and ovule (seed) discounting. The prevalence of IPT and the …
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The Floral Biology of Nymphaea Odorata Aiton
The floral biology of Nymphaea odorata Aiton native to central Texas has been studied. Anthesis occurs over a three day period with flowers opening each morning. First day flowers are protogynous and the pollen-receptive stigmas secrete a fluid which fills the perigynous cup. Pollen covered …
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Floral evolution of long-tubed Erica species
… a diversity of pollination syndromes and floral traits. This makes Erica well-suited to study the evolution of floral traits and how they impact speciation. The first chapter explored the role of ultraviolet colouration by recording its prevalence across Erica pollination syndromes. …
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Anatomia floral do gênero Barbosella Schltr. (Orchidaceae: Pleurothallidinae)
Resumo: As orquídeas podem atrair seus polinizadores através de sinais visuais e olfatórios, sem de fato oferecer algum tipo de recompensa, caracterizando esse mecanismo como polinização por engodo. Outras orquídeas podem apresentar osmóforos e nectários, como estruturas secretoras relacionadas com …
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Identifying floral hosts of cerambycid beetles using palynology
… of feeding in this group is inferred from floral host records, which are biased against tall trees because they are inaccessible to naturalists. I present a simplified palynological method for extracting and quantifying pollen from the frass of 21 species of beetles collected on flowers, …
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Floral richness inventory of an eastern U.S. forest
Two watersheds on the southern end of Havens State Wildlife Management Area, Roanoke County, Virginia, were sampled for vascular plant species richness. Two-hundred and forty-eight species were identified. Three methods of sampling for species richness in eastern forests were compared: timed-search …
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Understanding the classical maize floral development mutant, Polytypic ear1
… aspects of inflorescence development, including floral development. Pt1 heterozygote ears and tassels appear to have barren tips with extra floral organs towards the base with extra silks or branch-like protrusions. While the causative gene is unknown, RNA-seq provided direction for candidate …
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Evolution of floral morphology in Brunsvigia and Crossyne (Amaryllidaceae)
Floral morphology and its relationship to pollination syndromes is examined, for the genera Brunsvigia and Crossyne (Amaryllidaceae). These two genera have similar vegetative morphologies and share the same mode of seed dispersal (anemogeochory). They differ in their floral and inflorescence …
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Molecular genetics of the floral response in Xerophta humilis
Includes abstract Includes bibliographical references
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Indicators of bioactivity and floral origin of New Zealand honeys
… that NIR might be capable of discriminating one floral source from another was explored. No prior analysis of NIR for New Zealand honeys has been reported. A visual inspection of the NIR spectra of ten New Zealand honey types indicates that beech honeydew honey is significantly different from …
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Polimorfismo en el color floral y especiación en Lysimachia arvensis
… En plantas, el polimorfismo del color floral es un fenómeno ampliamente distribuido, pero poco frecuente, que se debe principalmente a la presencia de antocianinas. El polimorfismo del color ha sido definido como un “carácter mágico”, es decir, un carácter codificado por genes que están …
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Enhancement of Floral Species Richness in Glaciated Prairie Temporary Wetlands
Restored semipermanently flooded Prairie Pothole Region wetlands frequently recover plant species richness resembling undisturbed conditions. However, plant species richness in temporarily flooded wetlands often recovers poorly due to colonization by aggressive undesirable species. This study was …
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MOLECULAR ANALYSIS OF FLORAL PIGMENTATION IN THE ORCHID, BROMHEADIA FINLAYSONIANA
This project involved the isolation and characterisation of cDNAs in the flavonoid biosynthetic pathway of a local species of orchid, Bromheadia finlaysoniana (Lindl.) Rchb. F. A cDNA library was constructed from the fully-opened flowers of Bromheadia finlaysoniana. cDNA clones encoding …
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Mathematical modelling of the floral transition — with a Bayesian flourish —
… the biological mechanisms controlling the floral transition. However there has been little mathematical modelling of this process. The aim of this thesis was to gain an understanding of the essential features and dynamic properties underlying this developmental phase change from a systems …
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Evolution of Floral Morphology and Symmetry in the Miconieae (Melastomataceae)
<p>Analyses of evolution of floral morphology and symmetry broaden our understanding of the drivers of angiosperm diversification. Integrated within a flower, labile floral characters produce different phenotypes that promote variable interactions with pollinators. Thus, investigation of floral …
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Multiple dimensions of floral rewards drive pollinator behavior and pollen movement
… Together these three chapters highlight that floral rewards do not act in isolation, but rather pollen and nectar interactively shape pollinator behavior and can potentially impact plant fitness.
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