Foliar colleters in Macrocarpaea obtusifolia (Gentianaceae): anatomy, ontogeny, and secretion

Detalhes bibliográficos
Autor(a) principal: Dalvi, Valdnéa Casagrande
Data de Publicação: 2014
Outros Autores: Cardinelli, Lucas Siqueira, Meira, Renata Maria Strozi Alves, Azevedo, Aristéa Alves
Tipo de documento: Artigo
Idioma: eng
Título da fonte: LOCUS Repositório Institucional da UFV
Texto Completo: https://doi.org/10.1139/cjb-2013-0203
http://www.locus.ufv.br/handle/123456789/23118
Resumo: Colleters are secretory structures located in reproductive and (or) vegetative organs of many eudicots. In Gentianaceae Juss., the presence of foliar colleters has been neglected, and anatomical and histochemical studies are scarce. The objectives of this study were to investigate the anatomy, ontogeny, and chemical nature of the secretion found in Macrocarpaea obtusifolia (Griseb.) Gilg colleters to establish a relationship between their structure and function and check whether these structures are similar to those described for other genera of the Gentianaceae and other families of the Gentianales. Samples of leaves at different developmental stages were collected and processed for anatomical and histochemical analysis using light microscopy and scanning electron microscopy. Colleters in M. obtusifolia have a protodermal origin, are of standard type, and are not vascularized. Young colleters are translucent and produce an abundant amount of sticky secretion. Later, they turn yellowish with a blackened region at the apex of the head, and the secretion, composed of polysaccharides and proteins, becomes less abundant and brownish. During senescence, the process begins with complete degradation and cell collapse of the secretory portion. The colleters of the standard type in M. obtusifolia have been observed for the first time in the Gentianaceae and represent additional evidence that reinforces how common this type of colleter is in the Gentianales. Such results provide new information on the anatomy, ontogeny, histochemistry, and colleter types of Gentianaceae.
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spelling Foliar colleters in Macrocarpaea obtusifolia (Gentianaceae): anatomy, ontogeny, and secretionMicromorphologyMucilageProteinsSecretory structuresMicromorphologieMucilageProtéinesStructures sécrétricesColleters are secretory structures located in reproductive and (or) vegetative organs of many eudicots. In Gentianaceae Juss., the presence of foliar colleters has been neglected, and anatomical and histochemical studies are scarce. The objectives of this study were to investigate the anatomy, ontogeny, and chemical nature of the secretion found in Macrocarpaea obtusifolia (Griseb.) Gilg colleters to establish a relationship between their structure and function and check whether these structures are similar to those described for other genera of the Gentianaceae and other families of the Gentianales. Samples of leaves at different developmental stages were collected and processed for anatomical and histochemical analysis using light microscopy and scanning electron microscopy. Colleters in M. obtusifolia have a protodermal origin, are of standard type, and are not vascularized. Young colleters are translucent and produce an abundant amount of sticky secretion. Later, they turn yellowish with a blackened region at the apex of the head, and the secretion, composed of polysaccharides and proteins, becomes less abundant and brownish. During senescence, the process begins with complete degradation and cell collapse of the secretory portion. The colleters of the standard type in M. obtusifolia have been observed for the first time in the Gentianaceae and represent additional evidence that reinforces how common this type of colleter is in the Gentianales. Such results provide new information on the anatomy, ontogeny, histochemistry, and colleter types of Gentianaceae.Les collerettes constituent des structures sécrétrices localisées dans les organes reproducteurs ou végétatifs de plusieurs eudicotylées. Chez les Gentianaceae, on a négligé la présence de collerettes foliaires; en effet, rares sont les études anatomiques et histochimiques. L’objectif des auteurs était d’examiner l’anatomie, l’ontogénie, et la nature chimique de la sécrétion se retrouvant dans les collerettes du Macrocarpaea obtusifolia (Griseb.) Gilg, afin d'établir la relation entre leur structure et leur fonction et de vérifier si ces structures sont semblables a` celles décrites chez d’autres genres de Gentianaceae et d’autres familles des Gentianales. Ils ont récolté des échantillons de feuilles a` divers stades de développement et effectué des analyses anatomiques et histochimiques a` l'aide de la microscopie photonique et a` électronique par balayage. Chez le M. obtusifolia, les collerettes ont une origine protodermique, sont de type standard et non vascularisées. Les jeunes collerettes translucides produisent une bonne quantité de sécrétion collante. Plus tard, elles deviennent jaunes avec une région a` col noir a` l’apex de la tête et la sécrétion, composée de polysaccharides et de protéines, devient moins abondante et brunit. Pendant la sénescence, le processus débute avec une dégradation complète avec un affaissement des cellules de la portion sécrétrice. On a observé pour la première fois les collerettes de type standard chez le M. obtusifolia, ce qui représente une preuve additionnelle supportant jusqu’a` quel point ce type de collerette est commun chez les Gentianales. De tels résultats fournissent une nouvelle information sur l’anatomie, l’ontogénie, l’histochimie, et les types de collerettes des Gentianaceae.Botany2019-01-21T21:58:14Z2019-01-21T21:58:14Z2014info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articlepdfapplication/pdf1916-2804https://doi.org/10.1139/cjb-2013-0203http://www.locus.ufv.br/handle/123456789/23118engVolume 92, Number 1, Pages 59- 67, 2014NRC Research Pressinfo:eu-repo/semantics/openAccessDalvi, Valdnéa CasagrandeCardinelli, Lucas SiqueiraMeira, Renata Maria Strozi AlvesAzevedo, Aristéa Alvesreponame:LOCUS Repositório Institucional da UFVinstname:Universidade Federal de Viçosa (UFV)instacron:UFV2024-07-12T08:15:14Zoai:locus.ufv.br:123456789/23118Repositório InstitucionalPUBhttps://www.locus.ufv.br/oai/requestfabiojreis@ufv.bropendoar:21452024-07-12T08:15:14LOCUS Repositório Institucional da UFV - Universidade Federal de Viçosa (UFV)false
dc.title.none.fl_str_mv Foliar colleters in Macrocarpaea obtusifolia (Gentianaceae): anatomy, ontogeny, and secretion
title Foliar colleters in Macrocarpaea obtusifolia (Gentianaceae): anatomy, ontogeny, and secretion
spellingShingle Foliar colleters in Macrocarpaea obtusifolia (Gentianaceae): anatomy, ontogeny, and secretion
Dalvi, Valdnéa Casagrande
Micromorphology
Mucilage
Proteins
Secretory structures
Micromorphologie
Mucilage
Protéines
Structures sécrétrices
title_short Foliar colleters in Macrocarpaea obtusifolia (Gentianaceae): anatomy, ontogeny, and secretion
title_full Foliar colleters in Macrocarpaea obtusifolia (Gentianaceae): anatomy, ontogeny, and secretion
title_fullStr Foliar colleters in Macrocarpaea obtusifolia (Gentianaceae): anatomy, ontogeny, and secretion
title_full_unstemmed Foliar colleters in Macrocarpaea obtusifolia (Gentianaceae): anatomy, ontogeny, and secretion
title_sort Foliar colleters in Macrocarpaea obtusifolia (Gentianaceae): anatomy, ontogeny, and secretion
author Dalvi, Valdnéa Casagrande
author_facet Dalvi, Valdnéa Casagrande
Cardinelli, Lucas Siqueira
Meira, Renata Maria Strozi Alves
Azevedo, Aristéa Alves
author_role author
author2 Cardinelli, Lucas Siqueira
Meira, Renata Maria Strozi Alves
Azevedo, Aristéa Alves
author2_role author
author
author
dc.contributor.author.fl_str_mv Dalvi, Valdnéa Casagrande
Cardinelli, Lucas Siqueira
Meira, Renata Maria Strozi Alves
Azevedo, Aristéa Alves
dc.subject.por.fl_str_mv Micromorphology
Mucilage
Proteins
Secretory structures
Micromorphologie
Mucilage
Protéines
Structures sécrétrices
topic Micromorphology
Mucilage
Proteins
Secretory structures
Micromorphologie
Mucilage
Protéines
Structures sécrétrices
description Colleters are secretory structures located in reproductive and (or) vegetative organs of many eudicots. In Gentianaceae Juss., the presence of foliar colleters has been neglected, and anatomical and histochemical studies are scarce. The objectives of this study were to investigate the anatomy, ontogeny, and chemical nature of the secretion found in Macrocarpaea obtusifolia (Griseb.) Gilg colleters to establish a relationship between their structure and function and check whether these structures are similar to those described for other genera of the Gentianaceae and other families of the Gentianales. Samples of leaves at different developmental stages were collected and processed for anatomical and histochemical analysis using light microscopy and scanning electron microscopy. Colleters in M. obtusifolia have a protodermal origin, are of standard type, and are not vascularized. Young colleters are translucent and produce an abundant amount of sticky secretion. Later, they turn yellowish with a blackened region at the apex of the head, and the secretion, composed of polysaccharides and proteins, becomes less abundant and brownish. During senescence, the process begins with complete degradation and cell collapse of the secretory portion. The colleters of the standard type in M. obtusifolia have been observed for the first time in the Gentianaceae and represent additional evidence that reinforces how common this type of colleter is in the Gentianales. Such results provide new information on the anatomy, ontogeny, histochemistry, and colleter types of Gentianaceae.
publishDate 2014
dc.date.none.fl_str_mv 2014
2019-01-21T21:58:14Z
2019-01-21T21:58:14Z
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
dc.type.driver.fl_str_mv info:eu-repo/semantics/article
format article
status_str publishedVersion
dc.identifier.uri.fl_str_mv 1916-2804
https://doi.org/10.1139/cjb-2013-0203
http://www.locus.ufv.br/handle/123456789/23118
identifier_str_mv 1916-2804
url https://doi.org/10.1139/cjb-2013-0203
http://www.locus.ufv.br/handle/123456789/23118
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv Volume 92, Number 1, Pages 59- 67, 2014
dc.rights.driver.fl_str_mv NRC Research Press
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rights_invalid_str_mv NRC Research Press
eu_rights_str_mv openAccess
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dc.publisher.none.fl_str_mv Botany
publisher.none.fl_str_mv Botany
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instname_str Universidade Federal de Viçosa (UFV)
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institution UFV
reponame_str LOCUS Repositório Institucional da UFV
collection LOCUS Repositório Institucional da UFV
repository.name.fl_str_mv LOCUS Repositório Institucional da UFV - Universidade Federal de Viçosa (UFV)
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