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 principales: Pujana, Roberto Román, Ruiz, Daniela Paula, Martínez, Leandro Carlos Alcides, Zhang, Yi
Formato: Articulo
Lenguaje:Inglés
Publicado: 2016
Materias:
Ciencias Naturales
Conifers
Wood anatomy
Fossils
Tracheid pit arrangement
Coníferas
Anatomía de maderas
Fósiles
Disposición de punteaduras radiales
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/111285
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-111285
record_format dspace
institution Universidad Nacional de La Plata
institution_str I-19
repository_str R-120
collection SEDICI (UNLP)
language Inglés
topic Ciencias Naturales
Conifers
Wood anatomy
Fossils
Tracheid pit arrangement
Coníferas
Anatomía de maderas
Fósiles
Disposición de punteaduras radiales
spellingShingle Ciencias Naturales
Conifers
Wood anatomy
Fossils
Tracheid pit arrangement
Coníferas
Anatomía de maderas
Fósiles
Disposición de punteaduras radiales
Pujana, Roberto Román
Ruiz, Daniela Paula
Martínez, Leandro Carlos Alcides
Zhang, Yi
Proposals for quantifying two characteristics of tracheid pit arrangement in gymnosperm woods
topic_facet 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.
format Articulo
Articulo
author Pujana, Roberto Román
Ruiz, Daniela Paula
Martínez, Leandro Carlos Alcides
Zhang, Yi
author_facet Pujana, Roberto Román
Ruiz, Daniela Paula
Martínez, Leandro Carlos Alcides
Zhang, Yi
author_sort Pujana, Roberto Román
title Proposals for quantifying two characteristics of tracheid pit arrangement in gymnosperm woods
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
publishDate 2016
url http://sedici.unlp.edu.ar/handle/10915/111285
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AT martinezleandrocarlosalcides proposalsforquantifyingtwocharacteristicsoftracheidpitarrangementingymnospermwoods
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