A5025570261- Bryophyte Studies and Records
- Lichen and fungal ecology
- Botany and Plant Ecology Studies
- Biocrusts and Microbial Ecology
- Botany, Ecology, and Taxonomy Studies
- Plant and animal studies
- Fern and Epiphyte Biology
- Marine and coastal plant biology
- Species Distribution and Climate Change
- Plant nutrient uptake and metabolism
- Genetic Mapping and Diversity in Plants and Animals
- Plant Molecular Biology Research
- Peatlands and Wetlands Ecology
- Plant Pathogens and Fungal Diseases
- Mediterranean and Iberian flora and fauna
- Mycorrhizal Fungi and Plant Interactions
- Plant Diversity and Evolution
- Protist diversity and phylogeny
- Plant Water Relations and Carbon Dynamics
- Ecology and Vegetation Dynamics Studies
- Forest Ecology and Biodiversity Studies
- Animal and Plant Science Education
- Plant Surface Properties and Treatments
- Biological Control of Invasive Species
- Health and Medical Research Impacts
University of Tennessee at Knoxville
2018-2025
University of California, Davis
2014-2016
University of Connecticut
2007-2013
Miami University
2003-2005
Pearson (United States)
2005
Genome size varies by orders of magnitude across land plants, and the factors driving evolutionary increases decreases in genome vary lineages. Bryophytes have smallest genomes relative to other plants there is growing evidence for frequent whole duplication (WGD) lineage. However, broad patterns size, chromosome number, WGD yet be characterized bryophytes a phylogenetic context. In present study, we use comparative approach leverage previously published data on reconstruct history these...
Variation in gene expression, addition to sequence polymorphisms, is known influence developmental, physiological, and metabolic traits plants. Genetic mapping populations have facilitated identification of expression quantitative trait loci (eQTL), the genetic determinants variation patterns. We used an introgression population developed from wild desert-adapted Solanum pennellii domesticated tomato (Solanum lycopersicum) identify basis transcript level variation. established effect each on...
Background and AimsThe maternal gametophytic calyptra is critical for moss sporophyte development ultimately sporogenesis. The has been predicted to protect the apex, including undifferentiated sporogenous region seta meristem, from desiccation. We investigate hypothesis that this waterproofing ability due a waxy cuticle. idea calyptrae are covered by cuticle present in literature over century, but, until now, neither presence nor absence of documented any calyptra.
Premise of the Study The Hymenochaetales are dominated by lignicolous saprotrophic fungi involved in wood decay. However, group also includes bryophilous and terricolous taxa, but their modes nutrition not clear. Here, we investigate patterns carbon nitrogen utilization numerous non‐lignicolous provide a phylogenetic context which these non‐canonical ecological guilds arose. Methods We combined stable isotope analyses δ 13 C 15 N to explore assignment evolution nutritional modes. Clustering...
Summary Parent–offspring relationships present a paradox wherein parents must balance limited resources between provisioning their offspring to increase chances of survival and maturation, reserving for own future reproduction. Bryophytes provide unique system explore this relationship due the dependency sporophytes on parental gametophytes throughout lifespan. We investigate morphological evolution gametophyte sporophyte characters test evidence coadaptation in Dicranaceae Schimp....
• Premise of the study: In vascular plants, leaf primordia prevent desiccation shoot apical meristem. Lacking leaves, undifferentiated moss sporophyte apex is covered by calyptra, a cap maternal gametophyte tissue that hypothesized to function in protection. Herein, we compare cuticle development on calyptra and assess calyptra's potential protect from desiccation. As first comprehensive study development, this research broadens our perspectives evolution across embryophytes. Methods:...
In bryophytes the sporophyte offspring are in contact with, nourished from, and partially surrounded by maternal gametophyte throughout their lifespan. During early development, moss is covered calyptra, a cap of tissue that has multilayered cuticle. this study effects on fitness removing calyptra cuticle, combination with dehydration stress, experimentally determined. Using Funaria hygrometrica, cuticle waxes were removed chemical extraction individuals exposed to short-term event....
Background and Aims Aerial surfaces of land plants are covered with a waxy cuticle to protect against water loss. The amount composition cuticular waxes on moss had rarely been investigated. Accordingly, the degree similarity between vascular plant waxes, maternal offspring structure is unknown. To resolve these issues, this study aimed at providing comprehensive analysis leafy gametophyte, gametophyte calyptra sporophyte capsule Funaria hygrometrica. Methods Waxes were extracted from...
Abstract Background and Aims Compared with other plant lineages, bryophytes have very small genomes little variation across species, high levels of endopolyploid nuclei. This study is the first analysis moss genome evolution over a broad taxonomic sampling using phylogenetic comparative methods. We aim to determine whether size unidirectional as well examine endopolyploidy are correlated in mosses. Methods Genome endoreduplication index (EI) estimates were newly generated flow cytometry from...
The calyptra is a maternal structure that protects the sporophyte offspring from dehydration, and positively impacts survival fitness in mosses. We explore relationship between cuticle protection height as proxy for dehydration stress Funariaceae species with sporophytes across range of sizes. Calyptrae four were collected laboratory-grown populations at two developmental stages. Tissues embedded, sectioned, examined using transmission electron microscopy. Cuticle thickness was measured...
Abstract 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 bryophytes. In mosses reduction may pertain the leafy gametophyte architecture sporophyte, is often considered linked shifts habitats. Reduction morphological obscure phylogenetic affinities taxa, when multiple derived characters are lost. Ephemeraceae comprise two genera, Ephemerum...
The presence or absence of a functional copy plastid gene may reflect relaxed selection, and be phylogenetically significant, reflecting shared ancestry. In some liverworts, the cysA is pseudogene (inferred to nonfunctional). We surveyed 63 liverworts from all major clades determine whether loss intact copies are under selective constraints, rates nucleotide substitution differ in other genes taxa with without cysA.Primers annealing flanking internal regions were used amplify sequence 61...
Critical Reviews in Plant Sciences presents cutting-edge reviews on a broad spectrum of research topics, typically focusing angiosperms and occasionally covering early diverging lineages such as...
The Timmiaceae (Bryophyta) have been traditionally classified within the Bryales based on peristome architecture. Phylogenetic analyses of nucleotide sequences revealed relationships that are incongruent with this hypothesis and implicated an origin for lineage early in radiation arthrodontous mosses (Bryopsida). This unexpected phylogenetic placement raises important questions about evolutionary significance Timmia peristome, which differs from all other by 64 isomorphic filaments topping...
Premise of research. Spores and pollen often exhibit distinctive morphology, resulting from the structure exine (spore wall), elaborate external ornamentation, known as perine. Spore-dispersed plants, particularly ferns, remarkable variation in surface their spores provide an excellent model for study morphological trait evolution. Our goal is to assess utility spore morphology characterizing clades taxa. For this study, we chose Thelypteridaceae, a family ferns with over 1000 species...
Abstract Questions What are the effects of rock‐climbing on diversity, abundance and composition cliff‐face vegetation along environmental gradients? Does site variability influence cliff more than presence climbing? Location Linville Gorge Wilderness Area, NC, USA. Methods We compared species richness, Shannon’s lichens, bryophytes vascular plants within 334 plots, each 1 m 2 . climbed plots with unclimbed using Non‐metric Multidimensional (Distance) Scaling ordination, means comparison...
The calyptra is a small, maternal gametophyte structure that covers the apex of offspring sporophyte and critical for transition from seta formation to capsule differentiation in many moss taxa. It has been hypothesized function by (1) providing mechanical constraint coordinates development presumptive capsule, (2) secreting hormones influence sporangium differentiation, (3) physically protecting undifferentiated region, (4) preventing water loss apex, and/or (5) lowering rate transpiration....
A comprehensive overview of volunteer-driven public programs focused on activities to enhance natural history collections (NHCs) is provided. The initiative revolves around the WeDigBio events and Collections Club at Field Museum, aiming deepen public's connection with scientific collections, participatory science, improve data associated specimens. implementation journey these are outlined, including surveys conducted from 2015 through 2021 gauge participant motivation, satisfaction, impact...
Abstract Environmental factors mediating community change over time have been well documented for vascular plants, but not their non‐vascular relatives, bryophytes. Elevation is one variable that has explored regarding bryophyte wherein as elevation increases, communities increase in diversity and abundance, whereas abundance decline plant communities. This begs the question, how might other environmental variables such slope aspect influence communities, these drive changes time? Our study...
A comprehensive overview of volunteer-driven public programs focused on activities to enhance natural history collections (NHCs) is provided. The initiative revolves around the WeDigBio events and Collections Club at Field Museum, aiming deepen public’s connection with scientific collections, participatory science, improve data associated specimens. implementation journey these are outlined, including surveys conducted from 2015 through 2021 gauge participant motivation, satisfaction, impact...
Nuclear ribosomal (26S) and chloroplast (trnL-trnF atpB-rbcL spacer) genomic regions were sequenced from 29 exemplars of Timmiaceae five outgroup taxa. Phylogenetic hypotheses tested analyses the individual a combined dataset, using both parsimony Bayesian inference methods. Estimates branch support established bootstrap posterior probabilities. The used to test monophyly species relationships among taxa in Timmiaceae, previously based on morphology. inferences suggest that Timmia austriaca,...