Browsing by Author "Pryer, Kathleen M"
Now showing items 1-20 of 22
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A diploids-first approach to species delimitation and interpreting polyploid evolution in the fern genus astrolepis (pteridaceae)
(Systematic Botany, 2010-04-01)Polyploidy presents a challenge to those wishing to delimit the species within a group and reconstruct the phylogenetic relationships among these taxa. A clear understanding of the tree-like relationships among the diploid ... -
A drought-driven model for the evolution of obligate apomixis in ferns: evidence from pellaeids (Pteridaceae).
(American journal of botany, 2021-02-23)<h4>Premise</h4>Xeric environments impose major constraints on the fern life cycle, yet many lineages overcome these limitations by evolving apomixis. Here, we synthesize studies of apomixis in ferns and present an evidence-based ... -
A numerical analysis of chromatographic profiles in North American taxa of the fern genus Gymnocarpium
(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 ... -
Abrupt deceleration of molecular evolution linked to the origin of arborescence in ferns.
(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 ... -
Applying machine learning to investigate long-term insect-plant interactions preserved on digitized herbarium specimens.
(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 ... -
Between two fern genomes.
(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 ... -
Cheilanthes ecuadorensis: A New Species of Cheilanthes s. s. (Pteridaceae) from Northern South America
(Systematic Botany, 2021-04-01)Ongoing research on the taxonomically complex genus Cheilanthes (Pteridaceae; Cheilanthoideae) has resulted in the identification of a new species from Loja Province in Ecuador, Cheilanthes ecuadorensis, described and illustrated ... -
Crowdfunding the Azolla fern genome project: a grassroots approach.
(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 ... -
Deciding among green plants for whole genome studies.
(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 ... -
DNA barcoding exposes a case of mistaken identity in the fern horticultural trade.
(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 ... -
Fern Phylogeny Based on rbcL Nucleotide Sequences
(American Fern Journal, 1995-10) -
Ferns diversified in the shadow of angiosperms.
(Nature, 2004-04)The rise of angiosperms during the Cretaceous period is often portrayed as coincident with a dramatic drop in the diversity and abundance of many seed-free vascular plant lineages, including ferns. This has led to the widespread ... -
Identifying multiple origins of polyploid taxa: a multilocus study of the hybrid cloak fern (Astrolepis integerrima; Pteridaceae).
(American journal of botany, 2012-11)PREMISE OF THE STUDY: Molecular studies have shown that multiple origins of polyploid taxa are the rule rather than the exception. To understand the distribution and ecology of polyploid species and the evolutionary significance ... -
Looking Back on 130 Years of Fern and Lycophyte Research in Glacier National Park, Montana: A Modern Taxonomic Account
(American Fern Journal, 2021-11-05) -
NCP activates chloroplast transcription by controlling phytochrome-dependent dual nuclear and plastidial switches.
(Nature communications, 2019-06-14)Phytochromes initiate chloroplast biogenesis by activating genes encoding the photosynthetic apparatus, including photosynthesis-associated plastid-encoded genes (PhAPGs). PhAPGs are transcribed by a bacterial-type RNA polymerase ... -
Overcoming deep roots, fast rates, and short internodes to resolve the ancient rapid radiation of eupolypod II ferns.
(Systematic biology, 2012-05)Backbone relationships within the large eupolypod II clade, which includes nearly a third of extant fern species, have resisted elucidation by both molecular and morphological data. Earlier studies suggest that much of the ... -
Phylogenetic Relationships of Extant Ferns Based on Evidence from Morphology and rbcL Sequences
(American Fern Journal, 1995-10) -
Phylogeny and evolution of ferns (monilophytes) with a focus on the early leptosporangiate divergences.
(American journal of botany, 2004-10)The phylogenetic structure of ferns (= monilophytes) is explored here, with a special focus on the early divergences among leptosporangiate lineages. Despite considerable progress in our understanding of fern relationships, ... -
Spore studies in the genus Gymnocarpium
(Canadian Journal of Botany, 1983-02-01)<jats:p> Scanning electron microscopy was used to examine the variation in perispore characters within and between six currently recognized taxa of the genus Gymnocarpium Newm. in North America. Representative scanning electron ... -
THE STATUS AND TYPIFICATION OF PHEGOPTERIS AND GYMNOCARPIUM
(TAXON, 1985-02)
