Cytology and embryology of the pompom weed, Campuloclinium macrocephalum (Eupatorieae, Asteraceae)

Autores
Farco, Gabriela Elizabeth; Sosa, Maria de Las Mercedes; Dematteis, Massimiliano; Fernandez, Aveliano
Año de publicación
2012
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
Campuloclinium macrocephalum (Less.) DC. is a perennial herb widely distributed in the New World, but introduced to South Africa, where it is commonly called “pompom weed”. This species is considered one of the most important weeds from Brazil and it has been included among the plant invaders of South Africa. Results of the meiotic and embryological analyses of six populations of C. macrocephalum are reported in this paper. The microsporogenesis analysis revealed five triploid (2n= 3x= 30) and one diploid (2n= 2x= 20) populations with a basic chromosome number x= 10. The diploid specimens showed regular meiotic behavior, but the triploid plants presented irregular chromosome pairing which result in the formation of univalents, bivalents and trivalents at diakinesis. In consequence, laggard chromosomes, unbalanced nuclei and micronuclei were observed in subsequent phases of meiosis. The embryological analysis showed that the triploid specimens of C. macrocephalum have embryo sac development from a nucellar cell (apospory), which indicates that these specimens are apomictic. Almost all cases of apomixis found in tribe Eupatorieae are diplosporous apomixis. Campuloclinium macrocephalum constitutes the second species of the tribe and the first of the genus with apospory as reproductive system. The aposporous apomixis combined with the presence of xylopodium would be two important factors responsible for the invasiveness of C. macrocephalum. © 2011 SAAB. Published by Elsevier B.V. All rights reserved.
Fil: Farco, Gabriela Elizabeth. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Nordeste. Instituto de Botánica del Nordeste (i); Argentina. Universidad Nacional de Cordoba. Facultad de Ciencias Exactas, Fisicas y Naturales; Argentina
Fil: Sosa, Maria de Las Mercedes. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Nordeste. Instituto de Botánica del Nordeste (i); Argentina. Universidad Nacional del Nordeste. Facultad de Ciencias Exactas Naturales y Agrimensura; Argentina
Fil: Dematteis, Massimiliano. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Nordeste. Instituto de Botánica del Nordeste (i); Argentina. Universidad Nacional del Nordeste. Facultad de Ciencias Exactas Naturales y Agrimensura; Argentina
Fil: Fernandez, Aveliano. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Nordeste. Instituto de Botánica del Nordeste (i); Argentina. Universidad Nacional del Nordeste. Facultad de Ciencias Exactas Naturales y Agrimensura; Argentina
Materia
Apomixis
Spospory
Eupatorium
Triploid
Weed
Nivel de accesibilidad
acceso abierto
Condiciones de uso
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
Repositorio
CONICET Digital (CONICET)
Institución
Consejo Nacional de Investigaciones Científicas y Técnicas
OAI Identificador
oai:ri.conicet.gov.ar:11336/2842
Acceder
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oai_identifier_str oai:ri.conicet.gov.ar:11336/2842
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repository_id_str 3498
network_name_str CONICET Digital (CONICET)
spelling Cytology and embryology of the pompom weed, Campuloclinium macrocephalum (Eupatorieae, Asteraceae)Farco, Gabriela ElizabethSosa, Maria de Las MercedesDematteis, MassimilianoFernandez, AvelianoApomixisSposporyEupatoriumTriploidWeedhttps://purl.org/becyt/ford/1.6https://purl.org/becyt/ford/1Campuloclinium macrocephalum (Less.) DC. is a perennial herb widely distributed in the New World, but introduced to South Africa, where it is commonly called “pompom weed”. This species is considered one of the most important weeds from Brazil and it has been included among the plant invaders of South Africa. Results of the meiotic and embryological analyses of six populations of C. macrocephalum are reported in this paper. The microsporogenesis analysis revealed five triploid (2n= 3x= 30) and one diploid (2n= 2x= 20) populations with a basic chromosome number x= 10. The diploid specimens showed regular meiotic behavior, but the triploid plants presented irregular chromosome pairing which result in the formation of univalents, bivalents and trivalents at diakinesis. In consequence, laggard chromosomes, unbalanced nuclei and micronuclei were observed in subsequent phases of meiosis. The embryological analysis showed that the triploid specimens of C. macrocephalum have embryo sac development from a nucellar cell (apospory), which indicates that these specimens are apomictic. Almost all cases of apomixis found in tribe Eupatorieae are diplosporous apomixis. Campuloclinium macrocephalum constitutes the second species of the tribe and the first of the genus with apospory as reproductive system. The aposporous apomixis combined with the presence of xylopodium would be two important factors responsible for the invasiveness of C. macrocephalum. © 2011 SAAB. Published by Elsevier B.V. All rights reserved.Fil: Farco, Gabriela Elizabeth. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Nordeste. Instituto de Botánica del Nordeste (i); Argentina. Universidad Nacional de Cordoba. Facultad de Ciencias Exactas, Fisicas y Naturales; ArgentinaFil: Sosa, Maria de Las Mercedes. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Nordeste. Instituto de Botánica del Nordeste (i); Argentina. Universidad Nacional del Nordeste. Facultad de Ciencias Exactas Naturales y Agrimensura; ArgentinaFil: Dematteis, Massimiliano. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Nordeste. Instituto de Botánica del Nordeste (i); Argentina. Universidad Nacional del Nordeste. Facultad de Ciencias Exactas Naturales y Agrimensura; ArgentinaFil: Fernandez, Aveliano. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Nordeste. Instituto de Botánica del Nordeste (i); Argentina. Universidad Nacional del Nordeste. Facultad de Ciencias Exactas Naturales y Agrimensura; ArgentinaElsevier Science2012-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/2842Farco, Gabriela Elizabeth; Sosa, Maria de Las Mercedes; Dematteis, Massimiliano; Fernandez, Aveliano; Cytology and embryology of the pompom weed, Campuloclinium macrocephalum (Eupatorieae, Asteraceae); Elsevier Science; South African Journal Of Botany; 78; 1-2012; 21-290254-6299enginfo:eu-repo/semantics/altIdentifier/doi/10.1016/j.sajb.2011.04.004info:eu-repo/semantics/altIdentifier/url/http://www.sciencedirect.com/science/article/pii/S0254629911000536info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-03T10:10:46Zoai:ri.conicet.gov.ar:11336/2842instacron: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:34982025-09-03 10:10:47.278CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Cytology and embryology of the pompom weed, Campuloclinium macrocephalum (Eupatorieae, Asteraceae)
title Cytology and embryology of the pompom weed, Campuloclinium macrocephalum (Eupatorieae, Asteraceae)
spellingShingle Cytology and embryology of the pompom weed, Campuloclinium macrocephalum (Eupatorieae, Asteraceae)
Farco, Gabriela Elizabeth
Apomixis
Spospory
Eupatorium
Triploid
Weed
title_short Cytology and embryology of the pompom weed, Campuloclinium macrocephalum (Eupatorieae, Asteraceae)
title_full Cytology and embryology of the pompom weed, Campuloclinium macrocephalum (Eupatorieae, Asteraceae)
title_fullStr Cytology and embryology of the pompom weed, Campuloclinium macrocephalum (Eupatorieae, Asteraceae)
title_full_unstemmed Cytology and embryology of the pompom weed, Campuloclinium macrocephalum (Eupatorieae, Asteraceae)
title_sort Cytology and embryology of the pompom weed, Campuloclinium macrocephalum (Eupatorieae, Asteraceae)
dc.creator.none.fl_str_mv Farco, Gabriela Elizabeth
Sosa, Maria de Las Mercedes
Dematteis, Massimiliano
Fernandez, Aveliano
author Farco, Gabriela Elizabeth
author_facet Farco, Gabriela Elizabeth
Sosa, Maria de Las Mercedes
Dematteis, Massimiliano
Fernandez, Aveliano
author_role author
author2 Sosa, Maria de Las Mercedes
Dematteis, Massimiliano
Fernandez, Aveliano
author2_role author
author
author
dc.subject.none.fl_str_mv Apomixis
Spospory
Eupatorium
Triploid
Weed
topic Apomixis
Spospory
Eupatorium
Triploid
Weed
purl_subject.fl_str_mv https://purl.org/becyt/ford/1.6
https://purl.org/becyt/ford/1
dc.description.none.fl_txt_mv Campuloclinium macrocephalum (Less.) DC. is a perennial herb widely distributed in the New World, but introduced to South Africa, where it is commonly called “pompom weed”. This species is considered one of the most important weeds from Brazil and it has been included among the plant invaders of South Africa. Results of the meiotic and embryological analyses of six populations of C. macrocephalum are reported in this paper. The microsporogenesis analysis revealed five triploid (2n= 3x= 30) and one diploid (2n= 2x= 20) populations with a basic chromosome number x= 10. The diploid specimens showed regular meiotic behavior, but the triploid plants presented irregular chromosome pairing which result in the formation of univalents, bivalents and trivalents at diakinesis. In consequence, laggard chromosomes, unbalanced nuclei and micronuclei were observed in subsequent phases of meiosis. The embryological analysis showed that the triploid specimens of C. macrocephalum have embryo sac development from a nucellar cell (apospory), which indicates that these specimens are apomictic. Almost all cases of apomixis found in tribe Eupatorieae are diplosporous apomixis. Campuloclinium macrocephalum constitutes the second species of the tribe and the first of the genus with apospory as reproductive system. The aposporous apomixis combined with the presence of xylopodium would be two important factors responsible for the invasiveness of C. macrocephalum. © 2011 SAAB. Published by Elsevier B.V. All rights reserved.
Fil: Farco, Gabriela Elizabeth. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Nordeste. Instituto de Botánica del Nordeste (i); Argentina. Universidad Nacional de Cordoba. Facultad de Ciencias Exactas, Fisicas y Naturales; Argentina
Fil: Sosa, Maria de Las Mercedes. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Nordeste. Instituto de Botánica del Nordeste (i); Argentina. Universidad Nacional del Nordeste. Facultad de Ciencias Exactas Naturales y Agrimensura; Argentina
Fil: Dematteis, Massimiliano. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Nordeste. Instituto de Botánica del Nordeste (i); Argentina. Universidad Nacional del Nordeste. Facultad de Ciencias Exactas Naturales y Agrimensura; Argentina
Fil: Fernandez, Aveliano. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Nordeste. Instituto de Botánica del Nordeste (i); Argentina. Universidad Nacional del Nordeste. Facultad de Ciencias Exactas Naturales y Agrimensura; Argentina
description Campuloclinium macrocephalum (Less.) DC. is a perennial herb widely distributed in the New World, but introduced to South Africa, where it is commonly called “pompom weed”. This species is considered one of the most important weeds from Brazil and it has been included among the plant invaders of South Africa. Results of the meiotic and embryological analyses of six populations of C. macrocephalum are reported in this paper. The microsporogenesis analysis revealed five triploid (2n= 3x= 30) and one diploid (2n= 2x= 20) populations with a basic chromosome number x= 10. The diploid specimens showed regular meiotic behavior, but the triploid plants presented irregular chromosome pairing which result in the formation of univalents, bivalents and trivalents at diakinesis. In consequence, laggard chromosomes, unbalanced nuclei and micronuclei were observed in subsequent phases of meiosis. The embryological analysis showed that the triploid specimens of C. macrocephalum have embryo sac development from a nucellar cell (apospory), which indicates that these specimens are apomictic. Almost all cases of apomixis found in tribe Eupatorieae are diplosporous apomixis. Campuloclinium macrocephalum constitutes the second species of the tribe and the first of the genus with apospory as reproductive system. The aposporous apomixis combined with the presence of xylopodium would be two important factors responsible for the invasiveness of C. macrocephalum. © 2011 SAAB. Published by Elsevier B.V. All rights reserved.
publishDate 2012
dc.date.none.fl_str_mv 2012-01
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/11336/2842
Farco, Gabriela Elizabeth; Sosa, Maria de Las Mercedes; Dematteis, Massimiliano; Fernandez, Aveliano; Cytology and embryology of the pompom weed, Campuloclinium macrocephalum (Eupatorieae, Asteraceae); Elsevier Science; South African Journal Of Botany; 78; 1-2012; 21-29
0254-6299
url http://hdl.handle.net/11336/2842
identifier_str_mv Farco, Gabriela Elizabeth; Sosa, Maria de Las Mercedes; Dematteis, Massimiliano; Fernandez, Aveliano; Cytology and embryology of the pompom weed, Campuloclinium macrocephalum (Eupatorieae, Asteraceae); Elsevier Science; South African Journal Of Botany; 78; 1-2012; 21-29
0254-6299
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/doi/10.1016/j.sajb.2011.04.004
info:eu-repo/semantics/altIdentifier/url/http://www.sciencedirect.com/science/article/pii/S0254629911000536
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
eu_rights_str_mv openAccess
rights_invalid_str_mv https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.format.none.fl_str_mv 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
reponame_str CONICET Digital (CONICET)
collection CONICET Digital (CONICET)
instname_str Consejo Nacional de Investigaciones Científicas y Técnicas
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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