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dc.contributor.author
Nicolau, Magali
dc.contributor.author
Gotelli, Marina María
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dc.contributor.author
Zarlavsky, Gabriela Elena
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dc.contributor.author
Galati, Beatriz
dc.date.available
2023-05-11T17:40:10Z
dc.date.issued
2022-06
dc.identifier.citation
Nicolau, Magali; Gotelli, Marina María; Zarlavsky, Gabriela Elena; Galati, Beatriz; Morphology, anatomy, and ultrastructure of the floral nectary of Alphitonia excelsa (Rhamnaceae) in relation to its taxonomic position; Springer; Revista Brasileira de Botanica; 45; 2; 6-2022; 703-711
dc.identifier.issn
1806-9959
dc.identifier.uri
http://hdl.handle.net/11336/197229
dc.description.abstract
Alphitonia excelsa (Fenzl) Reissek ex Benth. is a tree endemic to Australia. The study of floral characteristics can provide information that helps clarify the taxonomic position of the genus at the tribal level within Rhamnaceae, since it has not yet been determined. In this study, the morphology, anatomy and ultrastructure of the floral nectary were carried out with bright field, scanning and transmission electron microscopes. Alphitonia excelsa presents a structural nectary, with well-located and histologically differentiated areas. The epidermis has a single layer of cells, with a cuticle with undulations and striations, and sunken nectarostomas. The nectariferous tissue is formed by several layers of isodiametric cells, with a dense cytoplasm, large nuclei, small vacuoles, presence of plastids with several starch grains, numerous mitochondria, dictyosomes and rough endoplasmic reticulum. Cytoplasmic density decreases at the end of anthesis until this tissue is no longer differentiated from the subnectariferous parenchyma in post-anthesis. The subnectariferous tissue is formed by the third and last stratum of the nectary and is vascularized by boundless with abundant phloem. It is concluded that the annular type nectary, with sunken stomata, striated cuticle and absence of trichomes could represent a synapomorphy between Alphitonia excelsa (Tribe unknown), Gouania ulmifolia (Gouanieae Tribe), Ziziphus mucronata and Ziziphus jujuba (Paliureae Tribe). More studies should be done in order to confirm this position between or within the Gouanieae or Paliureae tribes of the Ziziphoids clade.
dc.format
application/pdf
dc.language.iso
eng
dc.publisher
Springer
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dc.rights
info:eu-repo/semantics/restrictedAccess
dc.rights.uri
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.subject
ALPHITONIA
dc.subject
NECTARY
dc.subject
RHAMNACEAE
dc.subject
SECRETORY TISSUE
dc.subject
ZIZIPHOIDS
dc.subject.classification
Ciencias de las Plantas, Botánica
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dc.subject.classification
Ciencias Biológicas
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dc.subject.classification
CIENCIAS NATURALES Y EXACTAS
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dc.title
Morphology, anatomy, and ultrastructure of the floral nectary of Alphitonia excelsa (Rhamnaceae) in relation to its taxonomic position
dc.type
info:eu-repo/semantics/article
dc.type
info:ar-repo/semantics/artículo
dc.type
info:eu-repo/semantics/publishedVersion
dc.date.updated
2023-05-11T13:30:21Z
dc.journal.volume
45
dc.journal.number
2
dc.journal.pagination
703-711
dc.journal.pais
Brasil
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dc.description.fil
Fil: Nicolau, Magali. Universidad de Buenos Aires. Facultad de Agronomía. Cátedra de Botánica General; Argentina
dc.description.fil
Fil: Gotelli, Marina María. Universidad de Buenos Aires. Facultad de Agronomía. Cátedra de Botánica General; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Parque Centenario; Argentina
dc.description.fil
Fil: Zarlavsky, Gabriela Elena. Universidad de Buenos Aires. Facultad de Agronomía. Cátedra de Botánica General; Argentina
dc.description.fil
Fil: Galati, Beatriz. Universidad de Buenos Aires. Facultad de Agronomía. Cátedra de Botánica General; Argentina
dc.journal.title
Revista Brasileira de Botanica
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dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/http://dx.doi.org/10.1007/s40415-022-00799-z
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