Jessica M Budke

Jessica M Budke
University of Tennessee | UTK · Department of Ecology and Evolutionary Biology

PhD

About

36
Publications
26,243
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399
Citations
Introduction
My research focuses on the development, evolution, and function of plant structures. I study morphological features that are used to distinguish species taxonomically and those that are important for reproduction and fitness. My research also focuses on the relationship between maternal gametophytes and their sporophyte offspring. I use electron microscopy, molecular systematic techniques, and manipulation experiments to address my research questions.
Additional affiliations
December 2011 - December 2012
University of Connecticut
Position
  • PostDoc Position
Education
January 2006 - November 2011
University of Connecticut
Field of study
  • Ecology and Evolutionary Biology
August 2003 - December 2005
University of Connecticut
Field of study
  • Botany
August 1999 - May 2003
Miami University
Field of study
  • Botany

Publications

Publications (36)
Article
The collection reported here of Palamocladium leskeoides, made in Tennessee, represents the first documented observation of antheridia on this species in North America. Palamocladium leskeoides is a dioicous moss species with a pantropical distribution. Uncommon in the United States, it grows in disjunct populations in moist habitats on calcareous...
Article
Full-text available
What are the effects of rock climbing on diversity, abundance, and composition of cliff‐face vegetation along environmental gradients? Does site variability influence cliff vegetation more than the presence of climbing? Linville Gorge Wilderness Area, NC, US. We compared species richness, Shannon’s diversity, abundance, and species composition of l...
Article
Moss sporophytes are physically attached to and dependent on the leafy gametophyte through their entire life. During early development, the sporophyte apex is covered by the calyptra, a cap of gametophytic tissue which protects the developing capsule. The aim of this study is to examine the influence of the calyptra on sporophyte transpiration rate...
Article
We report the first record of Portulaca amilis in Tennessee. A native of South America, P. amilis is a weedy plant that has been introduced to and naturalized in the southeastern United States. Previously this species has only been reported from the Atlantic Coastal Plain and Piedmont. This suggests a range expansion either west over the Appalachia...
Article
Background and Aims Compared to other plant lineages, bryophytes have very small genomes with little variation across species, and high levels of endopolyploid nuclei. This study is the first analysis of moss genome evolution over a broad taxonomic sampling using phylogenetic comparative methods. We aim to determine whether genome size evolution is...
Article
Full-text available
Premise of research. Spores and pollen often exhibit distinctive morphology, resulting from the structure of the exine (spore wall), and elaborate external ornamentation, known as perine. Spore-dispersed plants, particularly ferns, exhibit remarkable variation in the surface structure of their spores and provide an excellent model for the study of...
Article
The calyptra is a small, maternal gametophyte structure that covers the apex of the offspring sporophyte and is critical for the transition from seta formation to capsule differentiation in many moss taxa. It has been hypothesized to function by (1) providing a mechanical constraint that coordinates the development of the presumptive capsule, (2) s...
Article
Full-text available
The University of Tennessee Herbarium (TENN) presents a case study for modernizing an historic seed collection. TENN staff recently rediscovered the J. K. Underwood Seed Collection (ca. 1931–1964), containing over 700 unique specimens, hidden away in storage. We employed a series of curation actions to modernize the collection and render it useful...
Article
Premise of the Study The Hymenochaetales are dominated by lignicolous saprotrophic fungi involved in wood decay. However, the group also includes bryophilous and terricolous taxa, but their modes of nutrition are not clear. Here, we investigate patterns of carbon and nitrogen utilization in numerous non‐lignicolous Hymenochaetales and provide a phy...
Article
Background and aims: Aerial surfaces of land plants are covered with a waxy cuticle to protect against water loss. The amount and composition of cuticular waxes on moss surfaces had rarely been investigated. Accordingly, the degree of similarity between moss and vascular plant waxes, and between maternal and offspring moss structure waxes is unkno...
Article
Full-text available
Variation in gene expression, in addition to sequence polymorphisms, is known to influence developmental, physiological and metabolic traits in plants. Genetic mapping populations have facilitated identification of expression Quantitative Trait Loci (eQTL), the genetic determinants of variation in gene expression patterns. We used an introgression...
Preprint
Full-text available
Variation in gene expression, in addition to sequence polymorphisms, is known to influence developmental, physiological and metabolic traits in plants. Genetic mapping populations have facilitated identification of expression Quantitative Trait Loci (eQTL), the genetic determinants of variation in gene expression patterns. We used an introgression...
Article
Full-text available
The calyptra is a maternal structure that protects the sporophyte offspring from dehydration, and positively impacts sporophyte survival and fitness in mosses. We explore the relationship between cuticle protection and sporophyte height as a proxy for dehydration stress in Funariaceae species with sporophytes across a range of sizes. Calyptrae and...
Article
The plant cuticle, a multi-layered membrane that covers plant aerial surfaces to prevent desiccation, consists of the structural polymer cutin and surface-sealing waxes. Cuticular waxes are complex mixtures of ubiquitous, typically monofunctional fatty acid derivatives and taxon-specific, frequently bifunctional specialty compounds. To further our...
Article
Full-text available
Background and AimsIn bryophytes the sporophyte offspring are in contact with, nourished from, and partially surrounded by the maternal gametophyte throughout their lifespan. During early development, the moss sporophyte is covered by the calyptra, a cap of maternal gametophyte tissue that has a multilayered cuticle. In this study the effects on sp...
Article
Full-text available
Our research assesses the ability of calyptrae to produce protonema in the moss species Funaria hygrometrica Hedw. Herein the following question is addressed: how long after detachment from the maternal plant are calyptrae able to produce new individuals by means of protonema? Plants from a local Connecticut population were grown in laboratory cond...
Article
The moss family Funariaceae, which includes the model systems Funaria hygrometrica and Physcomitrella patens, comprises 15 genera, of which three accommodate approximately 95% of the 250-400 species. Generic concepts are drawn primarily from patterns in the diversity of morphological complexity of the sporophyte. Phylogenetic inferences from ten lo...
Article
Full-text available
Premise of the study: In vascular plants, leaf primordia prevent desiccation of the shoot apical meristem. Lacking leaves, the undifferentiated moss sporophyte apex is covered by the calyptra, a cap of maternal gametophyte tissue that is hypothesized to function in desiccation protection. Herein, we compare cuticle development on the calyptra and...
Article
Full-text available
Morphological complexity tends to increase at a macroevolutionary scale among land plants, but reversals or loss of previously acquired complex traits occurs across various lineages and in particular in bryophytes. In mosses reduction may pertain to the leafy gametophyte and the architecture of the sporophyte, and is often considered linked to shif...
Article
Full-text available
The presence or absence of a functional copy of a plastid gene may reflect relaxed selection, and may be phylogenetically significant, reflecting shared ancestry. In some liverworts, the plastid gene cysA is a pseudogene (inferred to be nonfunctional). We surveyed 63 liverworts from all major clades to determine whether the loss of cysA is phylogen...
Article
Full-text available
The maternal gametophytic calyptra is critical for moss sporophyte development and ultimately sporogenesis. The calyptra has been predicted to protect the sporophyte apex, including the undifferentiated sporogenous region and seta meristem, from desiccation. We investigate the hypothesis that this waterproofing ability is due to a waxy cuticle. The...
Article
My dissertation focuses on hypothesis that the gametophytic calyptra is covered by a cuticle and functions to prevent desiccation of the moss sporophyte apex. The following novel observations were made using the moss Funaria hygrometrica Hedw during the course of my dissertation research. The calyptra has a cuticle that is multi-layered and thicker...
Article
Full-text available
Costesia spongiosa is known only from central Chile. The recent discovery of several small populations prompted an examination of diagnostic morphological features and the sampling of DNA for surveying the chloroplast genome for a 71-kb inversion diagnostic of the Funariales and Encalyptales, and for reconstructing the phylogenetic affinities of th...
Article
Full-text available
The Timmiaceae (Bryophyta) have been traditionally classified within the Bryales based on peristome architecture. Phylogenetic analyses of nucleotide sequences have revealed relationships that are incongruent with this hypothesis and have implicated an origin for this lineage early in the radiation of arthrodontous mosses (Bryopsida). This unexpect...
Article
Full-text available
Nuclear ribosomal (26S) and chloroplast (trnL-trnF and atpB-rbcL spacer) genomic regions were sequenced from 29 exemplars of Timmiaceae and five outgroup taxa. Phylogenetic hypotheses were tested from analyses of the individual regions and a combined dataset, using both parsimony and Bayesian inference methods. Estimates of branch support were esta...
Article
Full-text available
The three known populations ofIsoetes tennesseensis were examined to document and analyze their morphological and anatomical characters. Characters examined included velum coverage, lacunae, leaf form and size, sporangial wall cells, and ligule and labium morphology. Three types of morphological patterns were found: stable, variable, and dimorphic....
Article
Full-text available
Isoe¨tes tennesseensis, an octoploid species with a chromosome count of 2n ¼ 88, is described. It occurs in the Hiwassee River in Tennessee. Past collections of this species have been misidentified as Isoe¨tes macrospora (¼ I. lacustris). Isoe¨tes tennesseensis differs from I. lacustris in chromosome number, megaspore and microspore morphology and...

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