Now showing items 1-20 of 62

    • A molecular phylogeny of scaly tree ferns (Cyatheaceae). 

      Korall, Petra; Conant, David S; Metzgar, Jordan S; Schneider, Harald; Pryer, Kathleen M (American journal of botany, 2007-05)
      Tree ferns recently were identified as the closest sister group to the hyperdiverse clade of ferns, the polypods. Although most of the 600 species of tree ferns are arborescent, the group encompasses a wide range of morphological ...
    • A molecular phylogeny of the fern family Pteridaceae: assessing overall relationships and the affinities of previously unsampled genera. 

      Schuettpelz, Eric; Schneider, Harald; Huiet, Layne; Windham, Michael D; Pryer, Kathleen M (Molecular phylogenetics and evolution, 2007-09)
      The monophyletic Pteridaceae accounts for roughly 10% of extant fern diversity and occupies an unusually broad range of ecological niches, including terrestrial, epiphytic, xeric-adapted rupestral, and even aquatic species. ...
    • A novel chloroplast gene reported for flagellate plants. 

      Song, Michael; Kuo, Li-Yaung; Huiet, Layne; Pryer, Kathleen M; Rothfels, Carl J; Li, Fay-Wei (American journal of botany, 2018-01)
      PREMISE OF THE STUDY:Gene space in plant plastid genomes is well characterized and annotated, yet we discovered an unrecognized open reading frame (ORF) in the fern lineage that is conserved across flagellate plants. METHODS:We ...
    • A numerical analysis of chromatographic profiles in North American taxa of the fern genus Gymnocarpium 

      Pryer, Kathleen M; Britton, Donald M; McNeill, John (Canadian Journal of Botany, 1983-10-01)
      <jats:p> As part of a systematic investigation of the genus Gymnocarpium in North America, a survey of chromatographic profiles in species and hybrids of the genus was initiated. It was established through cluster analysis ...
    • A plastid phylogeny of the cosmopolitan fern family cystopteridaceae (Polypodiopsida) 

      Rothfels, Carl J; Windham, Michael D; Pryer, Kathleen M (Systematic Botany, 2013-06-01)
      Among the novel results of recent molecular phylogenetic analyses are the unexpectedly close evolutionary relationships of the genera Acystopteris, Cystopteris, and Gymnocarpium, and the phylogenetic isolation of these genera ...
    • A step-by-step protocol for meiotic chromosome counts in flowering plants: A powerful and economical technique revisited. 

      Windham, Michael D; Pryer, Kathleen M; Poindexter, Derick B; Li, Fay-Wei; Rothfels, Carl J; Beck, James B (Applications in plant sciences, 2020-04-23)
      Premise:Counting chromosomes is a fundamental botanical technique, yet it is often intimidating and increasingly sidestepped. Once mastered, the basic protocol can be applied to a broad range of taxa and research questions. ...
    • A Unified Approach to Taxonomic Delimitation in the Fern Genus Pentagramma (Pteridaceae) 

      Schuettpelz, Eric; Pryer, Kathleen M; Windham, Michael D (Systematic Botany, 2015-01-01)
      © Copyright 2015 by the American Society of Plant Taxonomists.The native goldback and silverback ferns of western North America, composing the genus Pentagramma, are phylogenetically isolated within the xeric-adapted cheilanthoid ...
    • Abrupt deceleration of molecular evolution linked to the origin of arborescence in ferns. 

      Korall, Petra; Schuettpelz, Eric; Pryer, Kathleen M (Evolution; international journal of organic evolution, 2010-09)
      Molecular rate heterogeneity, whereby rates of molecular evolution vary among groups of organisms, is a well-documented phenomenon. Nonetheless, its causes are poorly understood. For animals, generation time is frequently ...
    • Adiantumshastense, a new species of maidenhair fern from California. 

      Huiet, Layne; Lenz, Martin; Nelson, Julie K; Pryer, Kathleen M; Smith, Alan R (PhytoKeys, 2015)
      A new species of Adiantum is described from California. This species is endemic to northern California and is currently known only from Shasta County. We describe its discovery after first being collected over a century ...
    • An Exploration into Fern Genome Space. 

      Wolf, Paul G; Sessa, Emily B; Marchant, Daniel Blaine; Li, Fay-Wei; Rothfels, Carl J; Sigel, Erin M; Gitzendanner, Matthew A; ... (13 authors) (Genome Biol Evol, 2015-08-26)
      Ferns are one of the few remaining major clades of land plants for which a complete genome sequence is lacking. Knowledge of genome space in ferns will enable broad-scale comparative analyses of land plant genes and genomes, ...
    • Applying machine learning to investigate long-term insect-plant interactions preserved on digitized herbarium specimens. 

      Meineke, Emily K; Tomasi, Carlo; Yuan, Song; Pryer, Kathleen M (Applications in plant sciences, 2020-06)
      Premise:Despite the economic significance of insect damage to plants (i.e., herbivory), long-term data documenting changes in herbivory are limited. Millions of pressed plant specimens are now available online and can be ...
    • Baja: A New Monospecific Genus Segregated from Cheilanthes s. l. (Pteridaceae) 

      George, Lisa O; Huiet, Layne; Kao, Tzu-Tong; Pryer, Kathleen M; Windham, Michael D (Systematic Botany, 2019-09-06)
    • Between two fern genomes. 

      Sessa, Emily B; Banks, Jo Ann; Barker, Michael S; Der, Joshua P; Duffy, Aaron M; Graham, Sean W; Hasebe, Mitsuyasu; ... (19 authors) (Gigascience, 2014)
      Ferns are the only major lineage of vascular plants not represented by a sequenced nuclear genome. This lack of genome sequence information significantly impedes our ability to understand and reconstruct genome evolution ...
    • Crowdfunding the Azolla fern genome project: a grassroots approach. 

      Li, Fay-Wei; Pryer, Kathleen M (Gigascience, 2014)
      Much of science progresses within the tight boundaries of what is often seen as a "black box". Though familiar to funding agencies, researchers and the academic journals they publish in, it is an entity that outsiders rarely ...
    • Cyanobacterial ribosomal RNA genes with multiple, endonuclease-encoding group I introns. 

      Haugen, Peik; Bhattacharya, Debashish; Palmer, Jeffrey D; Turner, Seán; Lewis, Louise A; Pryer, Kathleen M (BMC evolutionary biology, 2007-09-08)
      Group I introns are one of the four major classes of introns as defined by their distinct splicing mechanisms. Because they catalyze their own removal from precursor transcripts, group I introns are referred to as autocatalytic ...
    • Deciding among green plants for whole genome studies. 

      Pryer, Kathleen M; Schneider, Harald; Zimmer, Elizabeth A; Ann Banks, Jo (Trends in plant science, 2002-12)
      Recent comparative DNA-sequencing studies of chloroplast, mitochondrial and ribosomal genes have produced an evolutionary tree relating the diversity of green-plant lineages. By coupling this phylogenetic framework to the ...
    • Deciphering the origins of apomictic polyploids in the Cheilanthes yavapensis complex (Pteridaceae). 

      Grusz, Amanda L; Windham, Michael D; Pryer, Kathleen M (American journal of botany, 2009-09)
      Deciphering species relationships and hybrid origins in polyploid agamic species complexes is notoriously difficult. In this study of cheilanthoid ferns, we demonstrate increased resolving power for clarifying the origins ...
    • Development of microsatellite markers for the apomictic triploid fern Myriopteris lindheimeri (Pteridaceae). 

      Grusz, Amanda L; Pryer, Kathleen M (Applications in plant sciences, 2015-11-10)
      PREMISE OF THE STUDY:Microsatellite markers were developed for investigating the population dynamics of Myriopteris lindheimeri (Pteridaceae), an apomictic triploid fern endemic to deserts of the southwestern United States ...
    • DNA barcoding exposes a case of mistaken identity in the fern horticultural trade. 

      Pryer, Kathleen M; Schuettpelz, Eric; Huiet, Layne; Grusz, Amanda L; Rothfels, Carl J; Avent, Tony; Schwartz, David; ... (8 authors) (Molecular ecology resources, 2010-11)
      Using cheilanthoid ferns, we provide an example of how DNA barcoding approaches can be useful to the horticultural community for keeping plants in the trade accurately identified. We use plastid rbcL, atpA, and trnG-R sequence ...
    • Do asexual polyploid lineages lead short evolutionary lives? A case study from the fern genus Astrolepis. 

      Beck, James B; Windham, Michael D; Pryer, Kathleen M (Evolution; international journal of organic evolution, 2011-11)
      A life-history transition to asexuality is typically viewed as leading to a heightened extinction risk, and a number of studies have evaluated this claim by examining the relative ages of asexual versus closely related sexual ...