Growth architecture and silhouette of Jurassic conifers from La Matilde Formation, Patagonia, Argentina

Simple morphological traits are used to describe the architecture of a tree: the growth and branching process, the morphological differentiation of the axes and the position of reproductive structures. The main purpose of this contribution is to describe the growth architecture of the Jurassic conif...

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Authors: Falaschi, Paula, Grosfeld, Javier Edgardo, Zamuner, Alba Berta, Foix, Nicolas, Rivera, Stella M.
Format: article
Status:Published version
Publication Date:2011
Country:Argentina
Institution:Consejo Nacional de Investigaciones Científicas y Técnicas
Repository:CONICET Digital (CONICET)
Language:English
OAI Identifier:oai:ri.conicet.gov.ar:11336/68407
Online Access:http://hdl.handle.net/11336/68407
Access Level:Open access
Keyword:Araucariaceae
Argentina
Jurassic
Patagonia
Vegetal Architecture
https://purl.org/becyt/ford/1.5
https://purl.org/becyt/ford/1
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dc.title.none.fl_str_mv Growth architecture and silhouette of Jurassic conifers from La Matilde Formation, Patagonia, Argentina
title Growth architecture and silhouette of Jurassic conifers from La Matilde Formation, Patagonia, Argentina
spellingShingle Growth architecture and silhouette of Jurassic conifers from La Matilde Formation, Patagonia, Argentina
Falaschi, Paula
Araucariaceae
Argentina
Jurassic
Patagonia
Vegetal Architecture
https://purl.org/becyt/ford/1.5
https://purl.org/becyt/ford/1
title_short Growth architecture and silhouette of Jurassic conifers from La Matilde Formation, Patagonia, Argentina
title_full Growth architecture and silhouette of Jurassic conifers from La Matilde Formation, Patagonia, Argentina
title_fullStr Growth architecture and silhouette of Jurassic conifers from La Matilde Formation, Patagonia, Argentina
title_full_unstemmed Growth architecture and silhouette of Jurassic conifers from La Matilde Formation, Patagonia, Argentina
title_sort Growth architecture and silhouette of Jurassic conifers from La Matilde Formation, Patagonia, Argentina
dc.creator.none.fl_str_mv Falaschi, Paula
Grosfeld, Javier Edgardo
Zamuner, Alba Berta
Foix, Nicolas
Rivera, Stella M.
author Falaschi, Paula
author_facet Falaschi, Paula
Grosfeld, Javier Edgardo
Zamuner, Alba Berta
Foix, Nicolas
Rivera, Stella M.
author_role author
author2 Grosfeld, Javier Edgardo
Zamuner, Alba Berta
Foix, Nicolas
Rivera, Stella M.
author2_role author
author
author
author
dc.subject.none.fl_str_mv Araucariaceae
Argentina
Jurassic
Patagonia
Vegetal Architecture
https://purl.org/becyt/ford/1.5
https://purl.org/becyt/ford/1
topic Araucariaceae
Argentina
Jurassic
Patagonia
Vegetal Architecture
https://purl.org/becyt/ford/1.5
https://purl.org/becyt/ford/1
description Simple morphological traits are used to describe the architecture of a tree: the growth and branching process, the morphological differentiation of the axes and the position of reproductive structures. The main purpose of this contribution is to describe the growth architecture of the Jurassic conifer trees present at the most basal part of the La Matilde Formation in the locality of Monumento Natural Bosques Petrificados, Patagonia, Santa Cruz province, Argentina, and to compare it with that of extant and fossil conifers. This study is based on a large number of in situ petrified trunks, impressions and external molds of leafy branches and female cones in intimate association or organic connection with the trunks. The cones were assigned to Araucaria cf. A. mirabilis (Speg.) Windhausen emend. Calder (Araucariaceae) based on morphological and anatomical characters. The "Araucaria mirabilis" trees had 3 branching categories, corresponding to the typical pattern in extant Araucariaceae, although 4 branching categories cannot be completely discarded. The main, orthotropic stem (TA1) had rhythmic growth and branching, bearing 3-4, probably up to 6-7 plagiotropic branches in pseudowhorls. The lower part of the trees shows no branch-scars; therefore, self-pruning would have been present. Lateral branches (A2) had rhythmic branching: the branchlets (A3) were distributed regularly on the leading branch, with an alternate arrangement, conforming two orthostichies on the same horizontal plane. The female cones were borne terminal at the tip of peduncles, but lateral in position with respect to A2 branches. Reiteration patterns are present: total reiterations (bifurcated trunks and big, orthotropic branches in trunks with normal plagiotropic branches) and partial reiterations (epicormic branching) were observed. The root system consisted of 6 horizontal roots, no tap root was observed. Two architectural patterns or "morphotypes" were recognized at one of the forest levels studied, in keeping with other pieces of evidence (type of wood, foliage, and cones). The "Araucarioid morphotype or morphotype A" includes most of the studied specimens (i.e. "Araucaria mirabilis" trees); showing pseudowhorls of plagiotropic branches. These characters correspond to Massart's model, with certain modifications in the adult trees due to reiteration processes. Morphotype B was observed in bigger trunks with a distinctive costulated surface, which bear only orthotropic branches irregularly arranged, and without reiteration evidences; they could be assigned to Attim's model and possibly represent a different conifer taxon, though subrepresented. Partial and total reiteration patterns are described for the first time for Jurassic, Gondwanic conifers. Moreover, Massart's model can be followed from Upper Palaeozoic Walchiaceae to Mesozoic Araucariaceae.
publishDate 2011
dc.date.none.fl_str_mv 2011-03
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
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://hdl.handle.net/11336/68407
Falaschi, Paula; Grosfeld, Javier Edgardo; Zamuner, Alba Berta; Foix, Nicolas; Rivera, Stella M.; Growth architecture and silhouette of Jurassic conifers from La Matilde Formation, Patagonia, Argentina; Elsevier Science; Palaeogeography, Palaeoclimatology, Palaeoecology; 302; 3-4; 3-2011; 122-141
0031-0182
CONICET Digital
CONICET
url http://hdl.handle.net/11336/68407
identifier_str_mv Falaschi, Paula; Grosfeld, Javier Edgardo; Zamuner, Alba Berta; Foix, Nicolas; Rivera, Stella M.; Growth architecture and silhouette of Jurassic conifers from La Matilde Formation, Patagonia, Argentina; Elsevier Science; Palaeogeography, Palaeoclimatology, Palaeoecology; 302; 3-4; 3-2011; 122-141
0031-0182
CONICET Digital
CONICET
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/doi/10.1016/j.palaeo.2010.12.005
info:eu-repo/semantics/altIdentifier/url/https://www.sciencedirect.com/science/article/pii/S0031018210007108
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
https://creativecommons.org/licenses/by-nc-nd/2.5/ar/
eu_rights_str_mv openAccess
rights_invalid_str_mv https://creativecommons.org/licenses/by-nc-nd/2.5/ar/
dc.format.none.fl_str_mv application/pdf
application/pdf
application/pdf
application/pdf
application/pdf
dc.publisher.none.fl_str_mv Elsevier Science
publisher.none.fl_str_mv Elsevier Science
dc.source.none.fl_str_mv reponame:CONICET Digital (CONICET)
instname:Consejo Nacional de Investigaciones Científicas y Técnicas
instname_str Consejo Nacional de Investigaciones Científicas y Técnicas
reponame_str CONICET Digital (CONICET)
collection CONICET Digital (CONICET)
repository.name.fl_str_mv CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicas
repository.mail.fl_str_mv dasensio@conicet.gov.ar; lcarlino@conicet.gov.ar
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spelling Growth architecture and silhouette of Jurassic conifers from La Matilde Formation, Patagonia, ArgentinaFalaschi, PaulaGrosfeld, Javier EdgardoZamuner, Alba BertaFoix, NicolasRivera, Stella M.AraucariaceaeArgentinaJurassicPatagoniaVegetal Architecturehttps://purl.org/becyt/ford/1.5https://purl.org/becyt/ford/1Simple morphological traits are used to describe the architecture of a tree: the growth and branching process, the morphological differentiation of the axes and the position of reproductive structures. The main purpose of this contribution is to describe the growth architecture of the Jurassic conifer trees present at the most basal part of the La Matilde Formation in the locality of Monumento Natural Bosques Petrificados, Patagonia, Santa Cruz province, Argentina, and to compare it with that of extant and fossil conifers. This study is based on a large number of in situ petrified trunks, impressions and external molds of leafy branches and female cones in intimate association or organic connection with the trunks. The cones were assigned to Araucaria cf. A. mirabilis (Speg.) Windhausen emend. Calder (Araucariaceae) based on morphological and anatomical characters. The "Araucaria mirabilis" trees had 3 branching categories, corresponding to the typical pattern in extant Araucariaceae, although 4 branching categories cannot be completely discarded. The main, orthotropic stem (TA1) had rhythmic growth and branching, bearing 3-4, probably up to 6-7 plagiotropic branches in pseudowhorls. The lower part of the trees shows no branch-scars; therefore, self-pruning would have been present. Lateral branches (A2) had rhythmic branching: the branchlets (A3) were distributed regularly on the leading branch, with an alternate arrangement, conforming two orthostichies on the same horizontal plane. The female cones were borne terminal at the tip of peduncles, but lateral in position with respect to A2 branches. Reiteration patterns are present: total reiterations (bifurcated trunks and big, orthotropic branches in trunks with normal plagiotropic branches) and partial reiterations (epicormic branching) were observed. The root system consisted of 6 horizontal roots, no tap root was observed. Two architectural patterns or "morphotypes" were recognized at one of the forest levels studied, in keeping with other pieces of evidence (type of wood, foliage, and cones). The "Araucarioid morphotype or morphotype A" includes most of the studied specimens (i.e. "Araucaria mirabilis" trees); showing pseudowhorls of plagiotropic branches. These characters correspond to Massart's model, with certain modifications in the adult trees due to reiteration processes. Morphotype B was observed in bigger trunks with a distinctive costulated surface, which bear only orthotropic branches irregularly arranged, and without reiteration evidences; they could be assigned to Attim's model and possibly represent a different conifer taxon, though subrepresented. Partial and total reiteration patterns are described for the first time for Jurassic, Gondwanic conifers. Moreover, Massart's model can be followed from Upper Palaeozoic Walchiaceae to Mesozoic Araucariaceae.Fil: Falaschi, Paula. Universidad Nacional de La Plata. Facultad de Ciencias Agrarias y Forestales; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; ArgentinaFil: Grosfeld, Javier Edgardo. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Patagonia Norte. Instituto de Investigaciones en Biodiversidad y Medioambiente. Universidad Nacional del Comahue. Centro Regional Universidad Bariloche. Instituto de Investigaciones en Biodiversidad y Medioambiente; ArgentinaFil: Zamuner, Alba Berta. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo. Área Paleobotánica; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; ArgentinaFil: Foix, Nicolas. Universidad Nacional de la Patagonia "San Juan Bosco". Facultad de Ciencias Naturales - Sede Comodoro. Departamento de Geología; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; ArgentinaFil: Rivera, Stella M.. Universidad Nacional de La Plata. Facultad de Ciencias Agrarias y Forestales; ArgentinaElsevier Science2011-03info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfapplication/pdfapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/68407Falaschi, Paula; Grosfeld, Javier Edgardo; Zamuner, Alba Berta; Foix, Nicolas; Rivera, Stella M.; Growth architecture and silhouette of Jurassic conifers from La Matilde Formation, Patagonia, Argentina; Elsevier Science; Palaeogeography, Palaeoclimatology, Palaeoecology; 302; 3-4; 3-2011; 122-1410031-0182CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/doi/10.1016/j.palaeo.2010.12.005info:eu-repo/semantics/altIdentifier/url/https://www.sciencedirect.com/science/article/pii/S0031018210007108info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-nd/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2024-05-08T13:44:14Zoai:ri.conicet.gov.ar:11336/68407instacron:CONICETInstitucionalhttp://ri.conicet.gov.ar/Organismo científico-tecnológicoNo correspondehttp://ri.conicet.gov.ar/oai/requestdasensio@conicet.gov.ar; lcarlino@conicet.gov.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:34982024-05-08 13:44:14.961CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
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