Publikation:

The structure and vasculature in pollen cones of Taxus (Taxaceae, Gymnospermae) and its evolutionary significance

Lade...
Vorschaubild

Dateien

Doerken_2-1juz8yd5bdt816.pdf
Doerken_2-1juz8yd5bdt816.pdfGröße: 9.6 MBDownloads: 21

Datum

2024

Autor:innen

Herausgeber:innen

Kontakt

ISSN der Zeitschrift

Electronic ISSN

ISBN

Bibliografische Daten

Verlag

Schriftenreihe

Auflagebezeichnung

ArXiv-ID

Internationale Patentnummer

Link zur Lizenz
oops

Angaben zur Forschungsförderung

Projekt

Open Access-Veröffentlichung
Open Access Hybrid
Core Facility der Universität Konstanz

Gesperrt bis

Titel in einer weiteren Sprache

Publikationstyp
Zeitschriftenartikel
Publikationsstatus
Published

Erschienen in

Feddes Repertorium. Wiley. 2024, 135(2), S. 112-123. ISSN 0014-8962. eISSN 1522-239X. Verfügbar unter: doi: 10.1002/fedr.202300041

Zusammenfassung

The pollen cone structure and vasculature of Taxus baccata and T. wallichiana were investigated in the context of comparative studies in other conifers. The results indicate that the simple, flower-like pollen cone of Taxus could be derived from an ancestral compound inflorescence as in Cephalotaxus and Pseudotaxus. In Cephalotaxus, each lateral flower-like structure represents an entire pollen cone, compared with a single perisporangiate microsporangiophore in Pseudotaxus. The microsporangiophores are exclusively perisporangiate in both Pseudotaxus and Taxus, but in Pseudotaxus they are inserted in the axil of a pherophyll. By a simple reduction of these pherophylls, the Taxus pollen cone is formed—a strongly reduced inflorescence with flowers reduced to perisporangiate microsporangiophores, which are inserted directly at the cone axis, without pherophylls. Thus, the perisporangiate Taxus microsporangiophores correspond to the axillary flowers in Cephalotaxus and Pseudotaxus. The Taxus flower results from a strong reduction of an ancestral Cephalotaxus-like flower type (lateral pollen cones), where all remaining hyposporangiate microsporangiophores have fused to a radial structure during evolution. Thus, perisporangiate Taxus microsporangiophores represent radial synangia and not peltate microsporophylls, suggesting that hyposporangiate microsporangiophores are the ancestral condition in Taxaceae s.l.

Zusammenfassung in einer weiteren Sprache

Fachgebiet (DDC)
570 Biowissenschaften, Biologie

Schlagwörter

evolution, conifers, morphology, anatomy, cone, reproduction, sporophyll

Konferenz

Rezension
undefined / . - undefined, undefined

Forschungsvorhaben

Organisationseinheiten

Zeitschriftenheft

Zugehörige Datensätze in KOPS

Zitieren

ISO 690DÖRKEN, Veit, 2024. The structure and vasculature in pollen cones of Taxus (Taxaceae, Gymnospermae) and its evolutionary significance. In: Feddes Repertorium. Wiley. 2024, 135(2), S. 112-123. ISSN 0014-8962. eISSN 1522-239X. Verfügbar unter: doi: 10.1002/fedr.202300041
BibTex
@article{Dorken2024struc-69224,
  year={2024},
  doi={10.1002/fedr.202300041},
  title={The structure and vasculature in pollen cones of Taxus (Taxaceae, Gymnospermae) and its evolutionary significance},
  number={2},
  volume={135},
  issn={0014-8962},
  journal={Feddes Repertorium},
  pages={112--123},
  author={Dörken, Veit}
}
RDF
<rdf:RDF
    xmlns:dcterms="http://purl.org/dc/terms/"
    xmlns:dc="http://purl.org/dc/elements/1.1/"
    xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#"
    xmlns:bibo="http://purl.org/ontology/bibo/"
    xmlns:dspace="http://digital-repositories.org/ontologies/dspace/0.1.0#"
    xmlns:foaf="http://xmlns.com/foaf/0.1/"
    xmlns:void="http://rdfs.org/ns/void#"
    xmlns:xsd="http://www.w3.org/2001/XMLSchema#" > 
  <rdf:Description rdf:about="https://kops.uni-konstanz.de/server/rdf/resource/123456789/69224">
    <dcterms:title>The structure and vasculature in pollen cones of Taxus (Taxaceae, Gymnospermae) and its evolutionary significance</dcterms:title>
    <dc:contributor>Dörken, Veit</dc:contributor>
    <foaf:homepage rdf:resource="http://localhost:8080/"/>
    <bibo:uri rdf:resource="https://kops.uni-konstanz.de/handle/123456789/69224"/>
    <dcterms:isPartOf rdf:resource="https://kops.uni-konstanz.de/server/rdf/resource/123456789/28"/>
    <dcterms:abstract>The pollen cone structure and vasculature of Taxus baccata and T. wallichiana were investigated in the context of comparative studies in other conifers. The results indicate that the simple, flower-like pollen cone of Taxus could be derived from an ancestral compound inflorescence as in Cephalotaxus and Pseudotaxus. In Cephalotaxus, each lateral flower-like structure represents an entire pollen cone, compared with a single perisporangiate microsporangiophore in Pseudotaxus. The microsporangiophores are exclusively perisporangiate in both Pseudotaxus and Taxus, but in Pseudotaxus they are inserted in the axil of a pherophyll. By a simple reduction of these pherophylls, the Taxus pollen cone is formed—a strongly reduced inflorescence with flowers reduced to perisporangiate microsporangiophores, which are inserted directly at the cone axis, without pherophylls. Thus, the perisporangiate Taxus microsporangiophores correspond to the axillary flowers in Cephalotaxus and Pseudotaxus. The Taxus flower results from a strong reduction of an ancestral Cephalotaxus-like flower type (lateral pollen cones), where all remaining hyposporangiate microsporangiophores have fused to a radial structure during evolution. Thus, perisporangiate Taxus microsporangiophores represent radial synangia and not peltate microsporophylls, suggesting that hyposporangiate microsporangiophores are the ancestral condition in Taxaceae s.l.</dcterms:abstract>
    <dcterms:hasPart rdf:resource="https://kops.uni-konstanz.de/bitstream/123456789/69224/1/Doerken_2-1juz8yd5bdt816.pdf"/>
    <dspace:hasBitstream rdf:resource="https://kops.uni-konstanz.de/bitstream/123456789/69224/1/Doerken_2-1juz8yd5bdt816.pdf"/>
    <void:sparqlEndpoint rdf:resource="http://localhost/fuseki/dspace/sparql"/>
    <dcterms:issued>2024</dcterms:issued>
    <dcterms:available rdf:datatype="http://www.w3.org/2001/XMLSchema#dateTime">2024-02-02T08:23:16Z</dcterms:available>
    <dspace:isPartOfCollection rdf:resource="https://kops.uni-konstanz.de/server/rdf/resource/123456789/28"/>
    <dc:language>eng</dc:language>
    <dc:creator>Dörken, Veit</dc:creator>
    <dc:date rdf:datatype="http://www.w3.org/2001/XMLSchema#dateTime">2024-02-02T08:23:16Z</dc:date>
  </rdf:Description>
</rdf:RDF>

Interner Vermerk

xmlui.Submission.submit.DescribeStep.inputForms.label.kops_note_fromSubmitter

Kontakt
URL der Originalveröffentl.

Prüfdatum der URL

Prüfungsdatum der Dissertation

Finanzierungsart

Kommentar zur Publikation

Allianzlizenz
Corresponding Authors der Uni Konstanz vorhanden
Internationale Co-Autor:innen
Universitätsbibliographie
Ja
Begutachtet
Unbekannt
Diese Publikation teilen