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Laboratory And Field Performance Of The Biosand Point Of Use Water Filtration System In The Artibonite Valley, Haiti, Andrew John Sisson
Laboratory And Field Performance Of The Biosand Point Of Use Water Filtration System In The Artibonite Valley, Haiti, Andrew John Sisson
Masters Theses
The research presented here is summary two years of studying the Biosand filter (BSF) both in Haiti during March 2011 and in the laboratory. In Chapter 2, we examined the long term use and sustainability 55 BSF systems near Deschapelles, Haiti and 47% were found to be no longer in use. Interviews with BSF owners revealed problems related to intermittent filter use. A review of 17 BSF field studies also was included to compare and substantiate observations made in Haiti. Together, previous field studies and our observations point toward the importance of providing culturally appropriate technologies and education materials explaining …
The Rise And Fall Of Kin Structure In The Neotropical, Family-Living Buff-Breasted Wren (Cantorchilus Leucotis) In Gamboa, Panama, Sarah C. Alessi
The Rise And Fall Of Kin Structure In The Neotropical, Family-Living Buff-Breasted Wren (Cantorchilus Leucotis) In Gamboa, Panama, Sarah C. Alessi
Masters Theses
Family-living species provide an exciting model to examine how natal dispersal and kin structure influence genetic structuring within local populations. Juvenile buff-breasted wrens (Cantorchilus leucotis) of both sexes delay dispersal and exhibit short-distance natal dispersal, which should lead to kin-structured populations in which relatives of both sexes occupy neighboring territories. Blood samples collected from juvenile and adult wrens in Gamboa, Panama were analyzed using microsatellite markers to determine whether related individuals are spatially clustered on neighboring territories, spatial clusters of relatives change over time, and if kin structure is sex-specific. Global and local spatial autocorrelation analyses detected genetic …
Early Arrest Mutant Ogre: A Defect In Cytokineis Caused By A Mutation In The Gene Racgap1, April Wicklund
Early Arrest Mutant Ogre: A Defect In Cytokineis Caused By A Mutation In The Gene Racgap1, April Wicklund
Masters Theses
The early arrest mutant ogre, isolated in the Tübingen screen, has a block in cytokinesis (Kane et al., 1996). Here I use genetic and molecular techniques to demonstrate that the ogre phenotype is caused by a lesion in the gene encoding Racgap1. I performed fine mapping studies using microsatellite markers to a 0.15 cM region containing the ogre locus. DNA sequence data revealed a nonsense mutation in the Racgap1 gene of ogre mutants, and in situ hybridization experiments showed a loss of racgap1 mRNA at later stages of development, likely by nonsense mediated decay. This evidence supports the abolishment …
Impact Of Rearing Conditions On The Microbiological Quality Of Retail Poultry Meat, Bridgshe Hardy
Impact Of Rearing Conditions On The Microbiological Quality Of Retail Poultry Meat, Bridgshe Hardy
Masters Theses
Poultry and poultry products are a leading source of foodborne pathogens and illnesses. The rearing conditions of poultry can be an influential factor on the presence of foodborne pathogens including Campylobacter and Salmonella because some types of rearing practices have increased risks in terms of biosecurity. However, there is a gap in knowledge of food safety in raw chicken products and no studies have reported the microbiological quality of turkeys produced under different rearing environments. Thus, the aim of this study was to compare conventionally and organically-reared whole chicken and turkey carcasses purchased from three retail outlets in Knoxville, TN. …
The Effects Of Leucine On Mitochondrial Biogenesis And Cell Cycle In A-375 Melanoma Cells, Tia Marie Filhiol
The Effects Of Leucine On Mitochondrial Biogenesis And Cell Cycle In A-375 Melanoma Cells, Tia Marie Filhiol
Masters Theses
Most cancer cells undergo the Warburg effect, a shift from oxidative to glycolytic metabolism accompanied by suppression of p53. We have demonstrated leucine stimulation of mitochondrial biogenesis, fatty acid oxidation, and p53 expression in both muscle and fat cells. Accordingly, we now sought to determine if leucine stimulates mitochondrial biogenesis and exit from cell cycle in A-375 melanoma cells. Because these cells use glucose as their primary substrate, cells were grown under both standard (11.1 mM) and reduced (5.5 mM) glucose conditions. Increasing glucose reduced mitochondrial mass 50-60%, and accelerated cell proliferation by ~20%. Leucine (0.25, 0.5, 0.75, and 1.0 …
Anaerobic Soil Disinfestation: Evaluation Of Anaerobic Soil Disinfestation (Asd) For Warm-Season Vegetable Production In Tennessee, David Grant Mccarty
Anaerobic Soil Disinfestation: Evaluation Of Anaerobic Soil Disinfestation (Asd) For Warm-Season Vegetable Production In Tennessee, David Grant Mccarty
Masters Theses
Anaerobic soil disinfestation (ASD) is a non-chemical, pre-plant soil treatment recently developed for control of pests such as soilborne plant pathogens, plant-parasitic nematodes, and weeds in specialty crop systems. Soil treatment by ASD includes incorporating a labile carbon (C) source, tarping with plastic, and irrigation of the topsoil to saturation to facilitate the development of strongly anaerobic soil conditions driven by soil microbes. Processes occurring during the anaerobic decomposition of the added C source have been reported control plant pests. The goal of this project was to evaluate and adapt the ASD procedure to environmental conditions and production systems in …
Fatty Acid Synthase 1 In Candida Albicans Virulence And The In Vitro Effects Of Fluconazole, Tetracycline In Combinatorial Therapy, Marissa Mandy Rodrigues
Fatty Acid Synthase 1 In Candida Albicans Virulence And The In Vitro Effects Of Fluconazole, Tetracycline In Combinatorial Therapy, Marissa Mandy Rodrigues
Masters Theses
Candida albicans, the causative agent of superficial and invasive mycoses, is a significant fungal pathogen associated with high mortality rates and considerable health-related costs. The most effective class of antifungals used for the treatment of candidiasis includes polyenes, echinocandins and azoles. However with the emergence of resistant strains, new antifungals are warranted for the effective treatment of candidiasis. Genes involved in biosynthetic enzymatic pathways that regulate metabolic processes are important for the survival of pathogenic fungi and can thus be exploited for the development of better antifungals. Fatty acid synthase 1, which is involved in the de novo biosynthesis of …
Compatibility Of Essential Oils With The Biocontrol Fungus, Beauveria Bassiana, Wanjing Liu
Compatibility Of Essential Oils With The Biocontrol Fungus, Beauveria Bassiana, Wanjing Liu
Masters Theses
The tomato seedling damping-off pathogens Rhizoctonia and Pythium have the potential to cause severe loss in the greenhouse and field. Both seed application of Beauveria bassiana and soil amendment with bioactive monarda herbages are sustainable approaches that can play a role in suppressing damping-off of tomato seedlings. The objectives of this research were to determine the compatibility of essential oils and B. bassiana, and to determine the impact of the two when used together as a seed treatment in greenhouse experiments.
Different concentrations of five essential oils that were active against damping-off pathogens (cymene, carvacrol, thymol, borneol, and geraniol) …
The Impacts Of Surface Mining Restoration Efforts On Soil Dwelling Nematode Communities In The Appalachian Region, Haley Shae Smith
The Impacts Of Surface Mining Restoration Efforts On Soil Dwelling Nematode Communities In The Appalachian Region, Haley Shae Smith
Masters Theses
Traditional restoration of post mining sites in the southeastern U.S. utilizes methods that discourage above and below-ground succession of native floral and faunal communities. Recent advances in mining restoration techniques proposed by the Appalachian Regional Reforestation Initiative (ARRI) have improved above-ground plant succession and growth rates in reclaimed sites by developing the Forestry Reclamation Approach (FRA), a process that discourages substrate compaction and encourages native plant succession. The below-ground component of these reclaimed areas remains undescribed, however. Below-ground invertebrate communities in mining restoration sites have been largely ignored, despite their potential importance to the long-term recovery of these profoundly disturbed …
Exploring Anaerobic Reductive Dechlorination At Low Ph Environments, Yi Yang
Exploring Anaerobic Reductive Dechlorination At Low Ph Environments, Yi Yang
Masters Theses
Chlorinated aliphatic hydrocarbons (CAHs), such as tetrachloroethene (PCE) and trichloroethene (TCE), are ubiquitously pollutants in aquifer sediments and groundwater due to their heavy usage in industry and inappropriate disposal in the last century. Among about 1300 NPL (National Priorities List) sites, PCE and TCE are the two most frequently detected hazardous contaminants.
Engineered bioremediation, including biostimulation and bioaugmentation, is a promising technology to clean those PCE and/or TCE contaminated sites. However, in many contaminated groundwater systems and hazardous waste sites, pH can be lower than 5 to 6. And release of HCl (strong acid) from anaerobic reductive dechlorination may lower …
Role Of Beta-Hydroxy-Beta-Methylbutyrate (Hmb) In Leucine Stimulation Of Mitochondrial Biogenesis And Fatty Acid Oxidation, Renee Ashley Stancliffe
Role Of Beta-Hydroxy-Beta-Methylbutyrate (Hmb) In Leucine Stimulation Of Mitochondrial Biogenesis And Fatty Acid Oxidation, Renee Ashley Stancliffe
Masters Theses
Mitochondrial dysfunction and the resulting oxidative stress is widely recognized as a contributing factor to the development of numerous pathophysiologies including obesity, diabetes, cardiovascular disease, sarcopenia, liver disease, dementia, amongst others. Mitochondrial dysfunction results in a reduced mitochondrial number and oxidative capacity, causing an increase in free radical production and consequently oxidative stress. As such, the characterization of compounds that can upregulate mitochondrial biogenesis and function could provide the foundation for the development of therapeutic nutraceuticals that promote mitochondrial health, and consequently reduce oxidative stress. Leucine is well recognized to stimulate muscle protein synthesis, and we have recently demonstrated that …
Geographic Variation In The Lower Temperature Tolerance In The Invasive Brown Anole, Anolis Sagrei And The Native Green Anole, Anolis Carolinensis (Sauria: Polychrotidae), Laura Carolina Maria Rubio
Geographic Variation In The Lower Temperature Tolerance In The Invasive Brown Anole, Anolis Sagrei And The Native Green Anole, Anolis Carolinensis (Sauria: Polychrotidae), Laura Carolina Maria Rubio
Masters Theses
Invasive species are considered to be the second greatest threat to native biodiversity and several factors have been identified as contributing to the success of introduced species, including their initial genetic variation and the ability of populations to adapt to a new environment. Temperature has a significant impact on reptilian ecology and distribution since they ordinarily rely on external heat sources for the maintenance of body temperatures suitable for normal activity. Body temperature affects performance in these organisms given its importance for all aspects of behavior, locomotion, courtship and rates of feeding and growth. Critical thermal tolerances can, therefore, give …
Adipose Tissue's Potential Role As A Reproductive Or Lactation Endocrine Gland, Megan Gray Macdougal
Adipose Tissue's Potential Role As A Reproductive Or Lactation Endocrine Gland, Megan Gray Macdougal
Masters Theses
While adipose tissue secretes hormones related to nutrition and metabolism, a few studies have provided evidence suggesting a direct reproductive role from adipose-derived products. The goal of this study was to determine if adipose tissue serves as a reproductive or lactation endocrine gland. Adipose tissue was associated with the reproductive tract of mature female cows in two locations, mesosalpinx and mesometrium (tissues supporting the oviduct and uterus, respectively), in varying amounts. Using quantitative polymerase chain reaction on a non-descript pool of cows, LHβ, CGA, PRL, FST, and LEP transcripts were demonstrated to be present in mesosalpinx, subcutaneous, visceral, and peri-renal …
Demographics And Seasonal Abundance Of Sportfish In Three Thermal Habitats Of Coffeen Lake, Anthony Paul Porreca
Demographics And Seasonal Abundance Of Sportfish In Three Thermal Habitats Of Coffeen Lake, Anthony Paul Porreca
Masters Theses
No abstract provided.
Origin Of Great Lakes Brown Trout, Salmo Trutta: A Phylogeographic Analysis Using Mtdna Sequence Variation, David Baisch
Origin Of Great Lakes Brown Trout, Salmo Trutta: A Phylogeographic Analysis Using Mtdna Sequence Variation, David Baisch
Masters Theses
The brown trout, Salmo trutta, was first introduced to the Laurentian Great Lakes in 1887 from European broodstocks to found a recreational salmonid fishery; however, the origins of these progenitor lineages remain largely unknown. Trout from these regions are very specialized to their native habitats and matching North American stocks to similar watersheds may help increase survivability by introducing the stock to a more appropriate environment. The objective of this study was to determine the European origins of brown trout found in the Great Lakes. We analyzed 144 brown trout from ten watersheds across Michigan and Wisconsin and identified …
Winter Habitat Selection And Genetic Relatedness Of Southern Flying Squirrels In Southwest Michigan, Sheila M. Miara
Winter Habitat Selection And Genetic Relatedness Of Southern Flying Squirrels In Southwest Michigan, Sheila M. Miara
Masters Theses
Few studies have examined winter habitat selection for southern flying squirrels (Glaucomys volans) in northern latitudes where winter conditions are harsher than southern latitudes and resource availability is particularly limiting. Winter den tree characteristics and use by 19 southern flying squirrels (10 females and 9 males) were investigated from November through February in 2010-2011 and 2011-2012. The mean home range size using 100% minimum convex polygon for 18 individuals was 3.40 ha (±0.46 0.46 SE) and there was no significant difference between genders (P= 0.56) or ages (P=0.50). The mean 95% fixed kernel home range size was 0.15 …
The Mother-Infant Dyad Study: A Grounded Theory Inquiry Into The Day-To-Day Experiences, Between First-Time Mothers And Their Infants, That Influence Feeding Practices, Jennifer Jean Helvey
The Mother-Infant Dyad Study: A Grounded Theory Inquiry Into The Day-To-Day Experiences, Between First-Time Mothers And Their Infants, That Influence Feeding Practices, Jennifer Jean Helvey
Masters Theses
Background: Inappropriate infant-feeding practices linked to excessive, rapid, early weight gain, are potentially powerful intervention points for reducing risk of later obesity. Understanding how and why these behaviors begin is currently the topic of much research. Because breastfeeding has been found to be somewhat protective against early rapid gain, and because low-income, Southeastern U.S. populations are significantly less likely to initiate and maintain breastfeeding, it is critical to focus efforts in these populations. Grounded theory methodology provides the optimal theoretical underpinnings for exploring development of these practices.
Research Objective: The objective was to explore, using grounded theory methodology, the set …
Catalytic Engineering Of The Flagellin Protein, Alexandra M. Haase
Catalytic Engineering Of The Flagellin Protein, Alexandra M. Haase
Masters Theses
Flagellin is the protein monomer that comprises the bacterial flagella for most bacteria, including Salmonella typhimurium. This protein has attracted attention for protein engineering because it is exported out of the cell, polymerized into stable fibers, is produced in large quantities and is relatively simple to purify. Using rational design with computer modeling, potential active sites in the flagellin protein structure were modeled after the human carbonic anhydrase II tetrahedral zinc binding site. In total, three locations were selected as potential active sites and the necessary mutations were successfully introduced. Flagella formation for the flagellin variants was demonstrated through …
Generation Of Tanapoxvirus Ankyrin Repeat Gene Deletion Mutant For Evaluating Its Role In Cell Tropism, Yogesh Suryawanshi
Generation Of Tanapoxvirus Ankyrin Repeat Gene Deletion Mutant For Evaluating Its Role In Cell Tropism, Yogesh Suryawanshi
Masters Theses
The host range of poxviruses is highly regulated and is limited to certain hosts. A number of genes in different poxviruses have been identified that contribute to cell tropism. The ankyrin (ANK) repeat genes encode for proteins characterized by the repetitive motifs in its amino acid sequence. These genes have been found to play a role in determining the ability of poxviruses to replicate in certain cell types. Tanapoxvirus (TPV) Kenya genome analysis indicated the presence of six ANK repeat genes of which T146R, T147R and T148R are present in the terminal part of the TPV-Kenya genome. To understand the …
Locating The Variability Of Soil Water Holding Capacity And Understanding Its Effects On Deficit Irrigation And Cotton Lint Yield, Heath Adam Duncan
Locating The Variability Of Soil Water Holding Capacity And Understanding Its Effects On Deficit Irrigation And Cotton Lint Yield, Heath Adam Duncan
Masters Theses
Precision irrigation equipment such as variable-rate center pivots is readily available to Tennessee growers and producers; however, little research exists describing its application to cotton grown in Tennessee. In order to optimize the use of variable-rate irrigation equipment and water resources, two experiments were performed to determine (1) whether or not ground-penetrating radar (GPR) and electrical conductivity (EC) measurements can be used to delineate variable-rate irrigation zones and (2) examine the response of cotton lint yield to varying rates and duration of irrigation.
GPR and EC measurements were recorded, validated using soil cores, and used to identify the subsurface variability …
Effects Of A Bacteriological Filter On Vo2max Measured By A Computerized Metabolic System, Christopher William Bach
Effects Of A Bacteriological Filter On Vo2max Measured By A Computerized Metabolic System, Christopher William Bach
Masters Theses
Purpose: To determine the effects of a purple bacteriological filter (PF) on the measured maximal oxygen uptake (VO2max) during a maximal treadmill test as well as its effect on the expiratory flow measurements during a pulmonary function test. Methods: Male (n=7) and female (n=7) runners (18-35 years old) completed two continuous graded exercise tests (GXTs) followed by pulmonary function tests (PFT); one with a purple filter (PF) and one with no filter (NF). The GXT consisted of running at a constant speed on a treadmill while gradually increasing the grade until volitional exhaustion was reached. Following each of …
Changes In Carbohydrates Of Navy Beans During Hydration And Subsequent Thermal Processing, Robert Blake Lowe
Changes In Carbohydrates Of Navy Beans During Hydration And Subsequent Thermal Processing, Robert Blake Lowe
Masters Theses
Navy beans were subjected to six different hydration protocols that varied in time, temperature, and methodology after which they were thermally processed in both a brine solution and a typical baked bean sauce. Beans, isolated starch, and hydration fluid were analyzed immediately after the completion of hydration protocols. Significant differences were noted between those protocols utilizing low heat (1 and 2) and those utilizing high heat methods (3-6). Bean from low heat protocols were firmer overall. Starch granules from low heat beans were smaller in overall size, experienced less surface damage retained birefringence, and could absorb more water (higher swell …
Kids Can Bike! A Parks And Recreation Program To Promote Youth Cycling, Jessica Lynn Chandler
Kids Can Bike! A Parks And Recreation Program To Promote Youth Cycling, Jessica Lynn Chandler
Masters Theses
Physical inactivity is a major concern, and is believed to contribute to the high prevalence of childhood obesity in U.S. schoolchildren. To address this problem, the Knoxville Area Coalition on Childhood Obesity launched a ‘Kids Can BIKE!’ program in 2012. The bicycling program is seven weeks long and is designed to increase physical activity, teach safe cycling skills, and explore Knoxville parks and greenways while having fun. The program targeted children in grades 4 and 5 who were already enrolled in an afterschool or summer program. Once a week, the children were transported to a location where they could safely …
Classification Accuracy Of The Wrist-Worn Genea Accelerometer During Structured Activity Bouts: A Cross-Validation Study, Whitney Allegra Welch
Classification Accuracy Of The Wrist-Worn Genea Accelerometer During Structured Activity Bouts: A Cross-Validation Study, Whitney Allegra Welch
Masters Theses
Purpose: The purpose of this study is to determine whether the left wrist cutpoints of Esliger et al., for the triaxial GENEA accelerometer, are accurate for predicting intensity categories during 14 different activities including; treadmill-based, home and office, and sport activities. Methods: 130 adults wore a GENEA accelerometer on their left wrist while performing various lifestyle activities. The Oxycon Mobile Portable Metabolic Unit was used to measure oxygen uptake during each activity. Statistical analysis used Spearman’s rank correlations to determine the relationship between measured and estimated intensity classifications. Cross tabulation tables were constructed to describe under or over …
Evaluating The Relationship Between Ultrasound-Derived Carcass Characteristics And Production Traits In Angus Cattle, William Michael Mayfield
Evaluating The Relationship Between Ultrasound-Derived Carcass Characteristics And Production Traits In Angus Cattle, William Michael Mayfield
Masters Theses
Profitability in the beef industry is a crucial aspect of management schemes. The overall aim of this study was to determine if carcass ultrasonography in replacement heifers could explain variation in traits such as reproduction, a major factor in beef cattle efficiency and profitability. During a 10-year period, data were obtained from 906 yearling heifers through the use of carcass ultrasonography. The measurements collected included adjusted values for ribeye area (REA), percent intramuscular fat (%IMF), rib fat (RF), and rump fat. A retrospective analysis was performed on data collected and variables were separated into the extreme high and low 25% …
Avian Habitat Response To Grazing, Haying, And Biofuels Production In Native Warm-Season Forages In The Mid-South, Jessie Lee Birckhead
Avian Habitat Response To Grazing, Haying, And Biofuels Production In Native Warm-Season Forages In The Mid-South, Jessie Lee Birckhead
Masters Theses
Declines in grassland birds have been attributed to loss of habitat, habitat degradation, and changes in land management. In the Mid-South, pasture and hayfield management has focused on maintaining dense stands of non-native forages that do not provide suitable vegetative structure for grassland birds or northern bobwhite. Native warm-season grasses have been promoted for livestock forage and biofuels feedstock. However, little information exists on how these practices affect habitat for grassland songbirds or northern bobwhite in the Mid-South. We conducted a study of two cattle grazing treatments, two hay harvest treatments and a biofuels harvest treatment on vegetative structure for …
Characterization Of The Che4 Signal Transduction Pathway In Taxis Behaviors Of Azospirillum Brasilense, Dhivya Kumar
Characterization Of The Che4 Signal Transduction Pathway In Taxis Behaviors Of Azospirillum Brasilense, Dhivya Kumar
Masters Theses
Azospirillum brasilense is a gram negative, soil diazotroph that colonizes the roots of agronomically important crops. Studies have shown that swimming motility is an important trait for its survival and colonization of plant roots by these bacteria. Taxis responses, such as chemotaxis and aerotaxis, depend on the ability of the organism to bias its movements in the presence of gradients. The recently sequenced genome of A. brasilense has been shown to possess four chemotaxis operons, but the dominant pathway that modulates swimming behavior by affecting swimming bias in this organism is unknown. Characterization of one of the chemotaxis operons, Che1, …
Modeling Interventions In The Owned Cat Population In Knox County, Tn, Evan Pierce Lancaster
Modeling Interventions In The Owned Cat Population In Knox County, Tn, Evan Pierce Lancaster
Masters Theses
The rapid growth of cat populations in many communities across the United States has resulted in overpopulation and an increase in euthanasia procedures. To combat these challenges, communities have instituted spay/neuter programs as a preventative strategy. In particular, Knox County, Tennessee, has developed and implemented a program, called the Spay Shuttle, which offers free spays and neuters for owned cats throughout the county.
We develop a discrete time, age-structured model of owned female cats in Knox County to investigate the effects of implementing extra spaying intervention strategies to the population over the course of 5 years. We determine that a …
Angiotensinogen Gene Silencing Reduces Lipid Accumulation And Inflammation In Cultured 3t3-L1 Adipocytes, Wenting Xin Carroll
Angiotensinogen Gene Silencing Reduces Lipid Accumulation And Inflammation In Cultured 3t3-L1 Adipocytes, Wenting Xin Carroll
Masters Theses
Obesity is characterized by metabolic complications which are related to several life-threatening diseases. Dysregulated inflammatory adipokines secretion from adipose tissue is believed as the major contributor to obesity-associated local and systemic inflammation, insulin resistance, and other metabolic dysfunctions.
Numerous studies in our lab and others pointed to the role of local adipose tissue renin-angiotensin system (RAS) in the pathogenesis of obesity, inflammation and insulin resistance. We hypothesized that adipocytes-derived angiotensinogen (Agt) played a critical role in adipogenesis and/or lipogenesis as well as adipose inflammation. To test, we established 3T3-L1 preadipocytes stably transfected with Agt-shRNA or scrambled sequence (Sc-shRNA). Transfected preadipocytes …
Mating System Biology Of The Florida Native Plant: Illicium Parviflorum, Nicholas Earl Buckley
Mating System Biology Of The Florida Native Plant: Illicium Parviflorum, Nicholas Earl Buckley
Masters Theses
Self-incompatibility is thought to have played a profound role in the evolution of the angiosperms. However, there is little evidence of self-incompatibility systems in early diverging lineages of flowering plants. Illicium parviflorum, one such early-divergent angiosperm, is an evergreen perennial species endemic to central Florida, particularly within the Ocala National Forest. Although locally abundant, I. parviflorum is currently listed as endangered at the state level due to being under constant threat of habitat disturbance and over-harvesting. Notably, this species had been described as self-incompatible due to its low seed-set. However, low seed set may also be a result of …