Browsing by Subject "Plant sciences"
Now showing items 1-15 of 15
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ABSOLUTE QUANTIFICATION IN SMALL PLANT RADIOTRACER STUDIES
(2017)The main objective of this dissertation research is to develop measurement and data-analysis tools for improving the quantitative accuracy of radiotracer studies of small plants, e.g., grasses in their early growth stages ... -
Bacterial Extracellular Vesicles and the Plant Immune Response
(2021)Cells from all levels of life secrete vesicles, which are nanoscale proteoliposomes packaged with a variety of proteins, lipids, and small molecule cargo. Depending on their origin, these extracellular vesicles are termed ... -
Dynamics at Different Scales: Hormonal Control in Oryza Sativa Root Circumnutation and Gene Regulation in Arabidopsis thaliana Cell Differentiation
(2020)This research spans multiple scales—from the entire organism, down to the genes that created it.The first project, “Gene Dynamics in Tissue Development”, explores how stem cell differentiation depends on the dynamics of ... -
Effect of Termination of Long-term Free Air CO2 Enrichment on Physiology and Carbon Allocation in a Loblolly Pine Dominated Forest
(2016)This dissertation examined the response to termination of CO2 enrichment of a forest ecosystem exposed to long-term elevated atmospheric CO2 condition, and aimed at investigating responses and their underlying mechanisms ... -
Evolutionary Genetics of Reduced Nectar Production in the Selfing Morning Glory, Ipomoea lacunosa (Convolvulaceae)
(2021)Nectar production is one of several traits that are reduced in flowering plants that display the selfing syndrome, a suite of trait reductions often associated with the transition from outcross-fertilization to ... -
Investigating Damage, Genetic Correlations, and Natural Selection to Understand Multiple Plant Defenses in Passiflora incarnata
(2015)Plants commonly produce multiple, seemingly redundant defenses, but the reasons for this are poorly understood. The specificity of defenses to particular herbivores could drive investment in multiple defenses. Alternatively, ... -
Mechanism of Light Signaling in Controlling Chloroplast Biogenesis
(2017)Phytochromes are red and far-red light receptors that initiate photomorphogenesis by reprogramming both nuclear and plastidial genomes. Early light signaling events include translocation of photoactivated phytochromes from ... -
Mechanisms of Dual-Targeting Arabidopsis HEMERA to the Chloroplasts and Nucleus
(2016)When a plant emerges from the soil, it faces a critical developmental transition from utilizing stored energy to grow rapidly toward the light, to developing chloroplasts and beginning photosynthesis. While it is known ... -
Minimum Requirements for Changing and Maintaining Cell Fate in the Arabidopsis Root
(2018)A cell’s trajectory from stem cell to differentiation, while often portrayed as a linear progression, is best described as a network that produces a mature state through several pathways acting together. There are few examples ... -
Population Genetics, Natural Selection and Genetic Architecture of the Selfing Syndrome in the Morning Glory Ipomoea lacunosa
(2017)The evolutionary transition from outcrossing to self-pollination occurs frequently in flowering plants and has direct and indirect effects on genomics, life history and floral morphology. The life history and floral traits ... -
Regulation of Cell Death During Arabidopsis Effector Triggered Immunity
(2019)In the plant innate immune system, diverse signals from a wide range of pathogens converge on the same output, effector triggered immunity (ETI) and the associated programmed cell death (PCD). Past genetic studies have succeeded ... -
The Causes and Fitness Benefits of Germinating Later in the Presence of Neighbors
(2018)Theoretical and empirical studies have consistently shown that the optimal timing of seed germination reduces exposure to physical stress and minimizes competitive interactions with neighbors. However, this research has ... -
The Effects of Seasonal Cues and Differential Gene Expression on the Developmental Switch of a Flower Polyphenism in Mimulus douglasii
(2017)Angiosperms have evolved multiple mating systems that allow reproductive success under varied conditions. Striking among these are cleistogamous mating systems, where individuals can produce alternative flower types specialized ... -
The molecular interplay between the circadian clock and the plant immune signal, salicylic acid
(2014)Plants have evolved the circadian clock to anticipate environmental changes and coordinate internal biological processes. Recent studies unveiled the circadian regulation on plant immune responses as well as a reciprocal ... -
The Transcriptional Regulation of the Central Plant Defense Signal, Salicylic Acid
(2014)Salicylic acid (SA) is a central plant defense signal. It is not only required for closing the stomata upon infection to prevent pathogens from entering into the plant apoplast, but also mediates defense responses activated ...
