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dc.contributor.author
Romero, María Florencia  
dc.contributor.author
Salas, Roberto Manuel  
dc.contributor.author
González, Ana María  
dc.date.available
2017-07-14T17:52:45Z  
dc.date.issued
2017-05  
dc.identifier.citation
Romero, María Florencia; Salas, Roberto Manuel; González, Ana María; Pollen development and orbicule and pollen grain morphology in species of Cephalanthus (Rubiaceae-Naucleeae) from the Americas; Csiro Publishing; Australian Journal of Botany; 65; 3; 5-2017; 233-247  
dc.identifier.issn
0067-1924  
dc.identifier.uri
http://hdl.handle.net/11336/20620  
dc.description.abstract
This paper is the first embryological report on the genus Cephalanthus L. and contributes to future studies in other genera in the tribe Naucleeae. The development of the anther wall in Cephalanthus glabratus (Spreng.) K. Schum. corresponds to the dicot type and microsporogenesis is simultaneous. The young wall of the anther has four layers: epidermis, endothecium, one middle layer and the secretory tapetum. The tissue of the septum has idioblasts with crystalline sand. In the wall of the mature anther, only the endothecium and remnants of epidermal cells were preserved. The occurrence and morphology of orbicules were observed in the mature anthers of all three species of Cephalanthus with scanning electron microscopy. The orbicules have taxonomic value at species level, since these structures allow us to distinguish between the species analyzed. The presence of a protruding oncus was observed for the first time in Cephalanthus in non-acetolyzed pollen grains. According to our observations, this structure is not affected by the state of anther dehiscence in Cephalanthus glabratus, because the oncus is visible and prominent in the mature pollen grains in both indehiscent and dehiscent anthers.  
dc.format
application/pdf  
dc.language.iso
eng  
dc.publisher
Csiro Publishing  
dc.rights
info:eu-repo/semantics/openAccess  
dc.rights.uri
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/  
dc.subject
Cephalanthus Glabratus  
dc.subject
Microsporogenesis  
dc.subject
Pollen  
dc.subject
Rubiaceae  
dc.subject
Anther Development  
dc.subject
Oncus  
dc.subject
Orbicules  
dc.subject.classification
Ciencias de las Plantas, Botánica  
dc.subject.classification
Ciencias Biológicas  
dc.subject.classification
CIENCIAS NATURALES Y EXACTAS  
dc.title
Pollen development and orbicule and pollen grain morphology in species of Cephalanthus (Rubiaceae-Naucleeae) from the Americas  
dc.type
info:eu-repo/semantics/article  
dc.type
info:ar-repo/semantics/artículo  
dc.type
info:eu-repo/semantics/publishedVersion  
dc.date.updated
2017-07-13T19:10:04Z  
dc.identifier.eissn
1444-9862  
dc.journal.volume
65  
dc.journal.number
3  
dc.journal.pagination
233-247  
dc.journal.pais
Australia  
dc.journal.ciudad
Clayton  
dc.description.fil
Fil: Romero, María Florencia. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Nordeste. Instituto de Botánica del Nordeste. Universidad Nacional del Nordeste. Facultad de Ciencias Agrarias. Instituto de Botánica del Nordeste; Argentina  
dc.description.fil
Fil: Salas, Roberto Manuel. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Nordeste. Instituto de Botánica del Nordeste. Universidad Nacional del Nordeste. Facultad de Ciencias Agrarias. Instituto de Botánica del Nordeste; Argentina. Universidad Nacional del Nordeste. Facultad de Ciencias Exactas Naturales y Agrimensura; Argentina  
dc.description.fil
Fil: González, Ana María. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Nordeste. Instituto de Botánica del Nordeste. Universidad Nacional del Nordeste. Facultad de Ciencias Agrarias. Instituto de Botánica del Nordeste; Argentina  
dc.journal.title
Australian Journal of Botany  
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/http://dx.doi.org/10.1071/BT16238  
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/url/http://www.publish.csiro.au/bt/BT16238