A5074961517- Bryophyte Studies and Records
- Botany and Plant Ecology Studies
- Lichen and fungal ecology
- Peatlands and Wetlands Ecology
- Coastal wetland ecosystem dynamics
- Plant Pathogens and Resistance
- Protist diversity and phylogeny
- Yeasts and Rust Fungi Studies
- Plant Taxonomy and Phylogenetics
- Marine and coastal plant biology
- Microbial Community Ecology and Physiology
- Methane Hydrates and Related Phenomena
- Chromosomal and Genetic Variations
- Polar Research and Ecology
- Bacteriophages and microbial interactions
- Plant Diversity and Evolution
- Gut microbiota and health
- Legume Nitrogen Fixing Symbiosis
- Genetics and Plant Breeding
- Genetic Mapping and Diversity in Plants and Animals
- Plant and Fungal Species Descriptions
- Genetic diversity and population structure
- Ecology and Vegetation Dynamics Studies
- Pancasila Values in Education
- Pesticide and Herbicide Environmental Studies
Duke University
2016-2025
Tibet University
2022
Piedmont International University
2010-2011
Durham University
2001
Ithaca College
1991-1994
University of Michigan
1994
Dalhousie University
1991
Significance Early branching events in the diversification of land plants and closely related algal lineages remain fundamental unresolved questions plant evolutionary biology. Accurate reconstructions these relationships are critical for testing hypotheses character evolution: example, origins embryo, vascular tissue, seeds, flowers. We investigated among streptophyte algae using largest set nuclear genes that has been applied to this problem date. Hypothesized were rigorously tested...
Using sequence data generated via target enrichment for phylogenetics requires reassembly of high-throughput reads into loci, presenting a number bioinformatics challenges. We developed HybPiper as user-friendly platform assembly gene regions, extraction exon and intron sequences, identification paralogous copies. test using baits designed to 333 phylogenetic markers 125 genes functional significance in Artocarpus (Moraceae).HybPiper implements parallel execution three phases: read mapping,...
Mosses are a highly diverse lineage of land plants, whose diversification, spanning at least 400 million years, remains phylogenetically ambiguous due to the lack fossils, massive early extinctions, late radiations, limited morphological variation, and conflicting signal among previously used markers. Here, we present phylogenetic reconstructions based on complete organellar exomes comparable set nuclear genes for this major plants. Our analysis 142 species representing 29 30 moss orders...
Peatlands are crucial sinks for atmospheric carbon but critically threatened due to warming climates. Sphagnum (peat moss) species keystone members of peatland communities where they actively engineer hyperacidic conditions, which improves their competitive advantage and accelerates ecosystem-level sequestration. To dissect the molecular physiological sources this unique biology, we generated chromosome-scale genomes two species: S. divinum angustifolium. show no gene colinearity with any...
Bryophytes (mosses, liverworts, hornworts) typically have broad geographical distributions that span two or more continents. Many species show classic patterns of disjunction are similar to those found in many other groups organisms (e.g. eastern Asia–eastern North America), and which thought result from fragmentation previously continuous ranges (i.e. vicariance). However, the bryophytes, these disjunctions often occur at infra‐specific level suggest morphological uniformity may belie...
Revolutionary new concepts of bryophyte relationships have emerged from molecular phylogenetic analyses conducted since the onset 21st century. For example, sequence data contradict historical notion that isophylly in leafy liverworts is plesiomorphic and simple thalloid are monophyletic. Also contrary to traditional views Leiosporoceros genetically distinct other hornworts Oedipodium sister peristomate mosses. Substantial increases ultrastructural anatomical likewise provided insights on...
Abstract The relative importance of introgression for diversification has long been a highly disputed topic in speciation research and remains an open question despite the great attention it received over past decade. Gene flow leaves traces genome similar to those created by incomplete lineage sorting (ILS), identification quantification gene presence ILS is challenging requires knowledge about true phylogenetic relationship among species. We use whole nuclear, plastid, organellar genomes...
Abstract Selection on spore dispersal mechanisms in mosses is thought to shape the transformation of sporophyte. The majority extant develop a sporangium that dehisces through loss an operculum, and regulates release movement articulate teeth, peristome, lining capsule mouth. Such complexity was acquired by Mesozoic Era, but lost some groups during subsequent diversification events, challenging resolution affinities for taxa with reduced architectures. Funariaceae are cosmopolitan diverse...
Nucleotide sequence variation in the ITS1-5.8S-ITS2 region of nuclear ribosomal DNA (nrDNA) from 70 populations Mielichhoferia elongata and M. mielichhoferiana, plus two outgroup species, was analysed using maximum parsimony likelihood methods. High levels nucleotide substitution numerous insertion-deletion events were detected within between species. is monophyletic with regard to nrDNA variation, but mielichhoferiana paraphyletic. (M. nested it.) A clade provides evidence vicariance, North...
Premise Phylogenetic trees of bryophytes provide important evolutionary context for land plants. However, published inferences overall embryophyte relationships vary considerably. We performed phylogenomic analyses and relatives using both mitochondrial plastid gene sets, investigated bryophyte plastome evolution. Methods employed diverse likelihood‐based to infer large‐scale phylogeny data sets. tested changes in purifying selection genes a mycoheterotrophic liverwort ( Aneura mirabilis )...
Nitrogen availability frequently limits photosynthetic production in Sphagnum moss-dominated high-latitude peatlands, which are crucial carbon-sequestering ecosystems at risk to climate change effects. It has been previously suggested that microbial methane-fueled fixation of atmospheric nitrogen (N 2 ) may occur these ecosystems, but this process and the organisms involved largely uncharacterized.
Sphagnum peatmosses are fundamental members of peatland ecosystems, where they contribute to the uptake and long-term storage atmospheric carbon. Warming threatens mosses is known alter composition their associated microbiome. Here, we use a microbiome transfer approach test if thermal origin influences host plant thermotolerance. We leveraged an experimental whole-ecosystem warming study collect field-grown Sphagnum, mechanically separate then onto germ-free laboratory for temperature...
The class Sphagnopsida (Bryophyta) includes two genera: Ambuchanania and Sphagnum. contains just one rare species known from Tasmanian localities, but Sphagnum comprises a speciose clade of mosses that dominates many wetland ecosystems, especially in the boreal zone Northern Hemisphere. Recent phylogenetic analyses have resolved well-supported clades within Sphagnum, polarizing evolution has been problematic because genus is so isolated it difficult to determine homologies between...
Many bryophyte species have distributions that span multiple continents. The hypotheses historically advanced to explain such rely on either long-distance spore dispersal or slow rates of morphological evolution following ancient continental vicariance events. We use phylogenetic analyses DNA sequence variation at three chloroplast loci (atpB-rbcL spacer, rps4 gene, and trnL intron 3′ spacer) examine these two in the trans-Antarctic moss Pyrrhobryum mnioides. find: (1) reciprocal monophyly...
Nucleotide sequences from eight nuclear, chloroplast, and mitochondrial genes were obtained 30 mosses (plus four outgroup liverworts) in order to resolve phylogenetic relationships among the major clades of division Bryophyta. Phylogenetic analyses conducted using maximum parsimony, likelihood (ML), Bayesian inference. Inferences compared homogeneous several heterogeneous models. Estimates clade confidence based on bootstrap analyses, posterior probabilities (in analyses) novel combined...
Most reconstructions of basal land plant relationships derived from morphological or molecular data suggest that the Sphagnopsida form a critical clade at near base mosses (Bryophyta s.s.). The include two orders: Sphagnales and Ambuchananiales, each with one family. Ambuchananiaceae is monotypic, A. leucobryoides Tasmania. Nucleotide sequences five genomic regions, nuclear genome (ITS 26S ribosomal DNA) three chloroplast (psbT, rpl16, trnL) were subjected to cladistic analyses in order...