Proposals for quantifying two characteristics of tracheid pit arrangement in gymnosperm woods

Arrangement of tracheid radial pits is frequently superficially mentioned in extant gymnosperm wood anatomy descriptions. However, pit arrangement is a key character for delimiting fossil-genera and fossil-species in gymnosperm woods. We propose two new indices for measuring and quantifying the radi...

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Autores: Pujana, Roberto Román, Ruiz, Daniela Paula, Martínez, Leandro Carlos Alcides, Zhang, Yi
Tipo de recurso: artículo
Estado:Versión publicada
Fecha de publicación:2016
País:Argentina
Institución:Universidad Nacional de La Plata
Repositorio:SEDICI (UNLP)
Idioma:inglés
OAI Identifier:oai:sedici.unlp.edu.ar:10915/111285
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/111285
Access Level:acceso abierto
Palabra clave:Ciencias Naturales
Conifers
Wood anatomy
Fossils
Tracheid pit arrangement
Coníferas
Anatomía de maderas
Fósiles
Disposición de punteaduras radiales
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spelling Proposals for quantifying two characteristics of tracheid pit arrangement in gymnosperm woodsPropuestas para cuantificar dos características de la disposición radial de las punteaduras en maderas de gimnospermasPujana, Roberto RománRuiz, Daniela PaulaMartínez, Leandro Carlos AlcidesZhang, YiCiencias NaturalesConifersWood anatomyFossilsTracheid pit arrangementConíferasAnatomía de maderasFósilesDisposición de punteaduras radialesArrangement of tracheid radial pits is frequently superficially mentioned in extant gymnosperm wood anatomy descriptions. However, pit arrangement is a key character for delimiting fossil-genera and fossil-species in gymnosperm woods. We propose two new indices for measuring and quantifying the radial pit arrangement in fossil and extant woods. The first one, contiguity percentage index (Cp), indicates if the pits are contiguous (=in contact or touching) or overlapping with the adjacent upper and lower pits, and has values from 0 to 100%. The second one, seriation index (Si), is an average of the seriation of the pits and is given as a numerical value equal or greater than 1; when pits are exclusively ordered in uniseriate columns the wood has a value of 1. These indices are useful for quantifying the pit arrangement and for helping to characterize the type of radial pitting (araucarian/ mixed/abietinean), particularly in fossil woods. These new indices also allow to express these two characters (contiguity and seriation) as continuous, making them more suitable for certain taxonomic or statistical analysis.La disposición de las punteaduras en las paredes radiales es frecuentemente mencionada superficialmente en descripciones de maderas actuales de gimnospermas. Sin embargo, la disposición de las punteaduras es un caracter fundamental para delimitar los géneros y especies fósiles en maderas de gimnospermas. Proponemos dos nuevos índices para medir y cuantificar la disposición de las punteaduras en maderas fósiles y actuales. El primero, índice del porcentaje de la contigüidad (Cp) indica si las punteaduras son contiguas (=en contacto o tocándose) o solapadas con las punteaduras superiores e inferiores adyacentes y tiene valores del 0 al 100%. El segundo, índice de seriación (Si) es la media de la seriación de las punteaduras y es un valor númerico igual o mayor a 1; cuando las punteaduras son exclusivamente uniseriadas tiene un valor de 1. Estos nuevos índices son útiles para cuantificar la disposición de las punteaduras y para ayudar a caracterizar el tipo de punteaduras radiales (araucarioides/mixtas/abietinoides), particularmente en maderas fósiles. Asimismo, tales índices permiten expresar estos dos caracteres (contigüidad y seriación) como continuos, lo cual es más adecuado para ciertos análisis taxonómicos o estadísticos.Facultad de Ciencias Naturales y Museo2016info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionArticulohttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdf117-124http://sedici.unlp.edu.ar/handle/10915/111285enginfo:eu-repo/semantics/altIdentifier/issn/1853-0400info:eu-repo/semantics/altIdentifier/doi/10.22179/REVMACN.18.455info:eu-repo/semantics/openAccesshttp://creativecommons.org/licenses/by/3.0/Creative Commons Attribution 3.0 Unported (CC BY 3.0)reponame:SEDICI (UNLP)instname:Universidad Nacional de La Platainstacron:UNLP2024-05-08T13:04:01Zoai:sedici.unlp.edu.ar:10915/111285Institucionalhttp://sedici.unlp.edu.ar/Universidad públicaNo correspondehttp://sedici.unlp.edu.ar/oai/snrdalira@sedici.unlp.edu.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:13292024-05-08 13:04:01.942SEDICI (UNLP) - Universidad Nacional de La Platafalse
dc.title.none.fl_str_mv Proposals for quantifying two characteristics of tracheid pit arrangement in gymnosperm woods
Propuestas para cuantificar dos características de la disposición radial de las punteaduras en maderas de gimnospermas
title Proposals for quantifying two characteristics of tracheid pit arrangement in gymnosperm woods
spellingShingle Proposals for quantifying two characteristics of tracheid pit arrangement in gymnosperm woods
Pujana, Roberto Román
Ciencias Naturales
Conifers
Wood anatomy
Fossils
Tracheid pit arrangement
Coníferas
Anatomía de maderas
Fósiles
Disposición de punteaduras radiales
title_short Proposals for quantifying two characteristics of tracheid pit arrangement in gymnosperm woods
title_full Proposals for quantifying two characteristics of tracheid pit arrangement in gymnosperm woods
title_fullStr Proposals for quantifying two characteristics of tracheid pit arrangement in gymnosperm woods
title_full_unstemmed Proposals for quantifying two characteristics of tracheid pit arrangement in gymnosperm woods
title_sort Proposals for quantifying two characteristics of tracheid pit arrangement in gymnosperm woods
dc.creator.none.fl_str_mv Pujana, Roberto Román
Ruiz, Daniela Paula
Martínez, Leandro Carlos Alcides
Zhang, Yi
author Pujana, Roberto Román
author_facet Pujana, Roberto Román
Ruiz, Daniela Paula
Martínez, Leandro Carlos Alcides
Zhang, Yi
author_role author
author2 Ruiz, Daniela Paula
Martínez, Leandro Carlos Alcides
Zhang, Yi
author2_role author
author
author
dc.subject.none.fl_str_mv Ciencias Naturales
Conifers
Wood anatomy
Fossils
Tracheid pit arrangement
Coníferas
Anatomía de maderas
Fósiles
Disposición de punteaduras radiales
topic Ciencias Naturales
Conifers
Wood anatomy
Fossils
Tracheid pit arrangement
Coníferas
Anatomía de maderas
Fósiles
Disposición de punteaduras radiales
description Arrangement of tracheid radial pits is frequently superficially mentioned in extant gymnosperm wood anatomy descriptions. However, pit arrangement is a key character for delimiting fossil-genera and fossil-species in gymnosperm woods. We propose two new indices for measuring and quantifying the radial pit arrangement in fossil and extant woods. The first one, contiguity percentage index (Cp), indicates if the pits are contiguous (=in contact or touching) or overlapping with the adjacent upper and lower pits, and has values from 0 to 100%. The second one, seriation index (Si), is an average of the seriation of the pits and is given as a numerical value equal or greater than 1; when pits are exclusively ordered in uniseriate columns the wood has a value of 1. These indices are useful for quantifying the pit arrangement and for helping to characterize the type of radial pitting (araucarian/ mixed/abietinean), particularly in fossil woods. These new indices also allow to express these two characters (contiguity and seriation) as continuous, making them more suitable for certain taxonomic or statistical analysis.
publishDate 2016
dc.date.none.fl_str_mv 2016
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
Articulo
http://purl.org/coar/resource_type/c_6501
info:ar-repo/semantics/articulo
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv http://sedici.unlp.edu.ar/handle/10915/111285
url http://sedici.unlp.edu.ar/handle/10915/111285
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/issn/1853-0400
info:eu-repo/semantics/altIdentifier/doi/10.22179/REVMACN.18.455
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
http://creativecommons.org/licenses/by/3.0/
Creative Commons Attribution 3.0 Unported (CC BY 3.0)
eu_rights_str_mv openAccess
rights_invalid_str_mv http://creativecommons.org/licenses/by/3.0/
Creative Commons Attribution 3.0 Unported (CC BY 3.0)
dc.format.none.fl_str_mv application/pdf
117-124
dc.source.none.fl_str_mv reponame:SEDICI (UNLP)
instname:Universidad Nacional de La Plata
instacron:UNLP
instname_str Universidad Nacional de La Plata
instacron_str UNLP
institution UNLP
reponame_str SEDICI (UNLP)
collection SEDICI (UNLP)
repository.name.fl_str_mv SEDICI (UNLP) - Universidad Nacional de La Plata
repository.mail.fl_str_mv alira@sedici.unlp.edu.ar
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