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Articles 1 - 9 of 9
Full-Text Articles in Life Sciences
Levels And Patterns Of Genetic Diversity In The Rare And Endangered Cumberland Stitchwort, Minuartia Cumberlandensis (Caryophyllaceae), Charles Thomas Winder
Levels And Patterns Of Genetic Diversity In The Rare And Endangered Cumberland Stitchwort, Minuartia Cumberlandensis (Caryophyllaceae), Charles Thomas Winder
Masters Theses
Sequences of a highly variable nuclear gene (G3pdh) were used to characterize genetic diversity within and among populations of the endangered rockhouse endemic, Minuartia cumberlandensis (Wofford and Kral) McNeill (Caryophyllaceae), and compared to a widespread and abundant related species, M. glabra (Michaux) McNeill. By reconstructing phylogenetic relationships among G3pdh variants (haplotypes) and observing the geographical distribution of those ordered variants, an attempt was made to gauge the effects of historical and contemporary population processes acting within the species, particularly those with potential implications for long-term conservation. Both M. cumberlandensis and M. glabra were found to have high overall …
Evaluation Of Botanical Oil Formulations For Management Of Powdery Mildew And Mites, Adriane Lorraine Cannon
Evaluation Of Botanical Oil Formulations For Management Of Powdery Mildew And Mites, Adriane Lorraine Cannon
Masters Theses
Experiments were conducted to evaluate the effects of newly created soybean oil formulations on powdery mildew (Erysiphe pulphra ), photosynthesis, phytotoxicity, and broad mites (Polyphagotarsonemus latus (Banks)) on dogwood ( Cornus florida (L.) 'Cloud Nine') trees, and to evaluate the amounts of formulations that are deposited and washed off of peach (Prunus persica, (L.)) leaves, dormant oak (Quercus phellos, (L.) ), and viburnum ( Viburnum x juddii) twigs after simulated rainfall. Oil treatments were applied using a back pack mist blower sprayed pre- and post- inoculation of powdery mildew to evaluate powdery mildew, …
Systematics And Species Concepts In The Genera Lentinus Fr. And Panus Fr., With Emphasis On The Lentinus Tigrinus, L. Crinitus And Panus Lecomtei Complexes, Edward A. Grand
Doctoral Dissertations
The monographic work of Pegler (1983) on Lentinus has established the taxonomic guidelines for most recent studies involving members of the genus (Moncalvo et al. 2002, Rolen 2001, Krüger 2002). Pegler’s taxonomic hierarchy combined both Lentinus Fr. and Panus Fr. into one large genus, Lentinus Fr. The combination of these genera and its validity was one of the reasons for beginning this study. For generic level comparisons, ribosomal DNA sequence data can be helpful for determining relationships among taxa (Binder and Hibbett 2002, Hibbett and Vilgalys 1991, 1993, Hibbett and Donoghue 2001, Moncalvo et al. 2002, Thorn et al. 2000). …
Molecular Systematics Of North American Eupatorium, Kunsiri Chaw Siripun
Molecular Systematics Of North American Eupatorium, Kunsiri Chaw Siripun
Doctoral Dissertations
This study had two primary goals: first, to prepare a thorough taxonomic revision of North American Eupatorium, and second, to conduct initial evaluations using molecular techniques of how diploid and polyploid populations of Eupatorium rotundifolium and E. sessilifolium relate to one another. Nuclear ribosomal internal transcribed spacer (ITS) region and chloroplast DNA (trnC-psbM) sequences were used for molecular analysis, which allowed assessment of relationships of the polyploidy samples based on both a biparentally and a maternally inherited marker. The Inter Simple Sequence Repeat (ISSR) method was used for examining the relationships among diploid and polyploid populations …
Effect Of Light Duration On Pulvinar Motor Organ Movements In Phaseolus Vulgaris, Thomas William Rinehart
Effect Of Light Duration On Pulvinar Motor Organ Movements In Phaseolus Vulgaris, Thomas William Rinehart
Presidential Scholars Theses (1990 – 2006)
With a well established model in place, the main objective of this study will be to determine if the pulvinar motor organs have a threshold radiation level to elicit paraheliotropic movements. Plants will be illuminated with full spectrum light at varying intensities and periods. Observation will take place minute-by-minute in an effort to denote certain lighting conditions which might trigger paraheliotropism.
Development And Light Response Of Leaves Of Metasequoia And Close Relatives, Xiaochun Li
Development And Light Response Of Leaves Of Metasequoia And Close Relatives, Xiaochun Li
Electronic Theses and Dissertations
Metasequoia glyptostroboides is a useful nearest living relative (NLR) of the Eocene fossil Metasequoia. Research on modern Metasequoia might give us some clues about its fossil counterpart. During this study the leaf anatomy of Metasequoia, Glyptostrobus, Sequoia and Taxodium was investigated with light microscopy and transmission electron microscopy. Metasequoia exhibits several characteristics of typical sciaphilic plants, such as slightly arched outer cell walls in the adaxial epidermal cells, strongly arched outer cell walls in the abaxial epidermal cells, mesophyll composed of spongy cells, chloroplasts with well-developed grana not only in mesophyll cells but in both the adaxial and abaxial epidermis. …
Investigation Of Relationships Between Short-Term Photosynthetic Performance And Long-Term Growth Of Zostera Marina, Elizabeth Amy Lewis
Investigation Of Relationships Between Short-Term Photosynthetic Performance And Long-Term Growth Of Zostera Marina, Elizabeth Amy Lewis
Dissertations, Theses, and Masters Projects
No abstract provided.
Effects Of Temporary Par Reduction On The Seagrass Amphibolis Griffithii (Black) Den Hartog, Paul R. Mackey
Effects Of Temporary Par Reduction On The Seagrass Amphibolis Griffithii (Black) Den Hartog, Paul R. Mackey
Theses : Honours
Declines in seagrass health and distribution are commonly caused through human induced reductions in the availability of photosynthetically active radiation (PAR). These reductions can result from a variety of human-induced perturbations, including channel dredging. The impetus for the research was driven by the broad-scale degradation of the ecologically important southern-Australian endemic seagrass Amphibolis griffithii (Black) den Hartog in Champion Bay, Geraldton, Western Australia. The study investigated the affects of reduced PAR on A. griffithii and identified responses that may be useful in developing management triggers to minimise the impact of PAR limitation events. The study was carried out during late …
Vegetation Dynamics Of A Tidal Freshwater Marsh: Long-Term And Inter-Annual Variability And Their Relationship To Salinity, Sarah B. Davies
Vegetation Dynamics Of A Tidal Freshwater Marsh: Long-Term And Inter-Annual Variability And Their Relationship To Salinity, Sarah B. Davies
Dissertations, Theses, and Masters Projects
No abstract provided.