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Articles 1 - 13 of 13
Full-Text Articles in Plant Biology
Pleistocene Glacial Effects On North American Phylogeographic Patterns, Noah Garland, Ingrid Jordon-Thaden
Pleistocene Glacial Effects On North American Phylogeographic Patterns, Noah Garland, Ingrid Jordon-Thaden
Scholars Week
The biodiversity of alpine ecosystems are grossly underestimated, in turn threatening habitat loss. Much work is needed in this respect to better understand the process of speciation and extinction in these environments, given the threat of global climate change. We are testing hypothesis regarding rapid radiation of plant lineages both into and out of refugia in the context of dispersal during post-glacial and inter-glacial periods, focusing on the phylogeny of trans-Beringian alpine plant species by observing circumpolar lineages extending into southern portions of the North American Cordillera, the Rocky Mountains and the Intermountain Region. Focal taxa include species of Draba …
A Tale Of Two Scents: Scent Preferences Of Naïve And Experienced Pollinators, Scout N. Steinhiser
A Tale Of Two Scents: Scent Preferences Of Naïve And Experienced Pollinators, Scout N. Steinhiser
2023 Midwest Ecology & Evolution Conference
Mounting evidence of pollinator decline and its repercussions on agriculture and plant diversity means that scientists must work to understand the details of plant-pollinator interactions. Though there are many facets to the relationship between plants and pollinators, one major mediator of this relationship is scent. As much is already known about the scent make-up of Narcissus and its pollinator partners, it is a great model system for additional research. This is also true for the insect species Vanessa cardui, a generalist pollinator found worldwide that has most likely come into contact with Narcissus and its scent. The objective of this …
Foliar Application Of Acetic Acid And Effectiveness Against Drought At Different Time Points In Soybean (Glycine Max) Development, Miranda Rudolph, Megan Taylor Phd.
Foliar Application Of Acetic Acid And Effectiveness Against Drought At Different Time Points In Soybean (Glycine Max) Development, Miranda Rudolph, Megan Taylor Phd.
Posters-at-the-Capitol
Drought is arguably the most serious environmental factor affecting crop production today. A plant's response to drought stress is extremely complex, affecting numerous metabolic pathways that are all interconnected in their responses. Due to this complex nature, scientists do not fully understand the implications of different treatments and how they affect these processes. Acetic acid has been shown to improve plant growth and resistance to drought stress, but exactly how it accomplishes this is also unknown. Soybeans (Glycine max) are one of the most important crops worldwide and can suffer significant yield loss due to drought stress. As climate change …
Thermal Tolerances Of The Invasive Macrophyte Hydrilla Verticillata, Joshua Williams
Thermal Tolerances Of The Invasive Macrophyte Hydrilla Verticillata, Joshua Williams
Graduate Research Showcase
Invasive species often rapidly spread due to their ability to adapt to a wide range of habitats they can occupy and lack of competition. Hydrilla verticillata is an invasive aquatic macrophyte that has spread across the United States due to human activities. Like many aquatic plants, Hydrilla has the ability to reproduce through fragmentation of the mother plant. In this method, Hydrilla fragments are then dispersed by water current to other areas where they can settle and grow. To date, little is known about the abiotic conditions that may restrict the spread of invasive Hydrilla. However, compared to other macrophytes …
Plant Biodiversity In The Face Of Climate Change: What Will Become Of Coastal Endemic Species?, Nila Le
Plant Biodiversity In The Face Of Climate Change: What Will Become Of Coastal Endemic Species?, Nila Le
Creative Activity and Research Day - CARD
How will longitudinally constrained coastal flora fare in the face of rapid anthropogenic climate change and disturbance? Coastal communities pose a unique problem for climate change and its associated risks. Species that are concentrated along the coast are naturally vulnerable to the influence of harsh abiotic ecology, such as coastal erosion and high salt concentrations. In addition, analogous to montane species-habitat interactions, coastal communities may be “pushed” off the coast edge as a result of tracking preferred climate in the face of climate variability and sea level rise. This can be problematic for species that cannot disperse quickly enough to …
Evaluating Effects Of Gene Mutation And Light Intensity On Arabidopsis Thaliana Development, Carolanne Bekus
Evaluating Effects Of Gene Mutation And Light Intensity On Arabidopsis Thaliana Development, Carolanne Bekus
Student Scholar Showcase
The completion of sequencing Arabidopsis thaliana’s genome has led to the next crucial challenge of determining gene function in these plants. A. thaliana is a model organism often compared to commercial crops. The discovery of gene function within these plants will aid in giving insight on how gene function can affect commercial crop production. Presented here is an analysis comparing wild-type Columbia (Col-O), to single gene mutants when knocking-out transcriptional factors VPI/ABI3-like 1 (val1) and basic region/leucine zipper motif (bZIP). These single gene mutations may affect several traits that in turn can result in morphological changes and/or …
Does The Fungal Pathogen (Botryosphaeria Dothidea) Exceed The Dehydration Tolerance Of Its Chaparral Host?, Cristian M. Garcia
Does The Fungal Pathogen (Botryosphaeria Dothidea) Exceed The Dehydration Tolerance Of Its Chaparral Host?, Cristian M. Garcia
Seaver College Research And Scholarly Achievement Symposium
We tested the hypothesis that an opportunistic endophytic fungus Botryosphaeria dothidea that frequently infects and causes dieback in several different species of chaparral shrubs in the Santa Monica Mountains continues to elongate and grow in host tissues at dehydration levels that exceed host survival. This was done by collecting several large branches from the field from three dominant species of co-occurring chaparral shrubs, Malosma laurina, Ceanothus spinosus, and Ceanothus megacarpus. We allowed branches to dehydrate at increasing lengths of time, from a few days to one week, in an air-conditioned laboratory, then sealed in plastic bags to allow tissuewater equilibration, …
Hydraulic Mechanisms Of Fungal-Induced Dieback In A Keystone Chaparral Species During Unprecedented Drought In California, Natalie M. Aguirre, Marissa E. Ochoa, Helen I. Holmlund, Frank E. Ewers, Stephen D. Davis
Hydraulic Mechanisms Of Fungal-Induced Dieback In A Keystone Chaparral Species During Unprecedented Drought In California, Natalie M. Aguirre, Marissa E. Ochoa, Helen I. Holmlund, Frank E. Ewers, Stephen D. Davis
Seaver College Research And Scholarly Achievement Symposium
Between 2012-2016, southern California experienced unprecedented drought that caused dieback in Malosma laurina, a keystone species of chaparral shrub communities. Dieback was especially severe in coastal exposures of the Santa Monica Mountains, leading to whole plant mortality exceeding 50% at some sites. We hypothesized that the endophytic fungus causing the dieback, Botryosphaeria dothidea, was successful in invading the xylem tissue of M. laurina because of protracted water stress, carbon starvation, or a combination of the two. We tested these possibilities in a controlled pot experiment by comparing three treatments, each inoculated with the fungus: (1) irrigated controls (2) …
Small Scale Heterogeneity In Vegetation Structure In A Patch-Burn-Grazing Landscape, Eric G. Behrens
Small Scale Heterogeneity In Vegetation Structure In A Patch-Burn-Grazing Landscape, Eric G. Behrens
UNO Student Research and Creative Activity Fair
Disturbances are drivers of spatial change in the plant communities of the tallgrass prairie ecosystem. Fire and large herbivore grazing are prevalent disturbances that maintain the vegetation structure and create spatial heterogeneity in vegetation at various scales. The fire-grazing disturbance interaction occurs when areas that have been recently burned are followed by intense grazing due to the high quality of forage regrowth. This interaction has been managed in tallgrass prairies in a homogenous method using uniform burning and grazing and a heterogeneous method using patch-burn-grazing (PBG). Vegetation heterogeneity at a large scale has been studied in PBG and uniformly managed …
The Effects Of Two Levels Of Salinity On Wisconsin Fast Plants, Megan M. Janssen, Emily Geison, Tiffany Bertoni, Matthew Zimmerman
The Effects Of Two Levels Of Salinity On Wisconsin Fast Plants, Megan M. Janssen, Emily Geison, Tiffany Bertoni, Matthew Zimmerman
Celebration of Learning
Wisconsin Fast Plant (Brassica rapa, Brassicaceae) seeds were planted in three, six-celled planting containers filled with potting soil and put beneath a continuous grow-lux light. One week after sprouting, one container (E1) was put into a separate tray filled with 0.5% NaCl solution, another container (E2) was put into a separate tray filled with 1.0% NaCl solution, and the third container was left in regular tap water. At seven-day intervals thereafter, the height of all plants was recorded, and the numbers of leaves and flowers were recorded. By week four of recording data, the average height (mm) of the control …
Outdoor Classroom And Wildlife Habitat Development, Patricia Sowell, Deborah Sherfey, Kandy Fear
Outdoor Classroom And Wildlife Habitat Development, Patricia Sowell, Deborah Sherfey, Kandy Fear
Education for Sustainability Summer Institute
No abstract provided.
An Oral History Of The American Chestnut In Southern Appalachia Presentation, Bethany N. Baxter
An Oral History Of The American Chestnut In Southern Appalachia Presentation, Bethany N. Baxter
American Chestnut Oral History Project
Bethany Baxter's defense presentation for the thesis entitled, An oral history of the American chestnut in Southern Appalachia, submitted to the faculty of the University of Tennessee at Chattanooga in partial fulfillment of the requirements of the degree of Master of Science.
American Chestnut Oral History Project Presentation And Interview Clips, Bethany N. Baxter
American Chestnut Oral History Project Presentation And Interview Clips, Bethany N. Baxter
American Chestnut Oral History Project
An interview recorded as part of the original research for the thesis entitled, An oral history of the American chestnut in Southern Appalachia, submitted to the faculty of the University of Tennessee at Chattanooga in partial fulfillment of the requirements of the degree of Master of Science.