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dc.contributor.author
Luna, María Luján
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dc.contributor.author
Ramos Giacosa, Juan Pablo
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dc.contributor.author
Yañez, Agustina
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dc.contributor.author
Giudice, Gabriela Elena
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dc.date.available
2018-08-22T19:03:46Z
dc.date.issued
2016-10
dc.identifier.citation
Luna, María Luján; Ramos Giacosa, Juan Pablo; Yañez, Agustina; Giudice, Gabriela Elena; Anatomical Features of the Tubercle and Young Sporophyte of the Annual Fern Anogramma chaerophylla Growing in the Punta Lara Natural Reserve (Buenos Aires, Argentina); American Fern Society; American Fern Journal; 106; 4; 10-2016; 231-241
dc.identifier.issn
0002-8444
dc.identifier.uri
http://hdl.handle.net/11336/56672
dc.description.abstract
The fern genus Anogramma is characterized by the presence of annual sporophytes and tubercles that persist through dry periods. Tubercles may host embryos that develop when climatic conditions are more favorable. As information on the structure of the tubercle and sporophyte of Anogramma chaerophylla is incomplete, the objective of this work was to analyze anatomical characteristics during development and deepen knowledge of the adaptive strategies of this species. Spores were grown in-vitro and different stages of tubercle development and embryonic sporophytes were fixed in FAA, embedded in Paraplast and analyzed using light microscopy. Initially, the green gametophyte developed antheridia and archegonia in its thickened portion, where later bisexual tubercles differentiated. Embryos developed only from the archegonia located in the tubercles, with one embryo developing per tubercule. During sporophyte growth the reserves accumulated in the tubercle were consumed. Oversized cells were observed at the junction between the green gametophyte and the tubercle, suggesting a possible role in translocation of substances. The young sporophyte consisted of a short shoot and a prominent foot. The placenta comprised the foot cells and the adjacent tubercle cells. The first leaves protruded soon and developed early as photosynthetic organs. Sporophytes remained attached to the tubercles until advanced stages of development. Vegetative propagation was documented in smaller tubercles that did not develop gametangia. Because few sporophytes were observed in vivo, it is likely that natural populations are maintained through vegetative propagation of the gametophyte until favorable conditions encourage development of sporophytes.
dc.format
application/pdf
dc.language.iso
eng
dc.publisher
American Fern Society
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dc.rights
info:eu-repo/semantics/openAccess
dc.rights.uri
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.subject
Adaptations
dc.subject
Anatomy
dc.subject
Anogramma
dc.subject
Embryo
dc.subject
Gametophyte
dc.subject.classification
Otras Ciencias Biológicas
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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
Anatomical Features of the Tubercle and Young Sporophyte of the Annual Fern Anogramma chaerophylla Growing in the Punta Lara Natural Reserve (Buenos Aires, Argentina)
dc.type
info:eu-repo/semantics/article
dc.type
info:ar-repo/semantics/artículo
dc.type
info:eu-repo/semantics/publishedVersion
dc.date.updated
2018-08-21T18:38:44Z
dc.journal.volume
106
dc.journal.number
4
dc.journal.pagination
231-241
dc.journal.pais
Estados Unidos
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dc.description.fil
Fil: Luna, María Luján. Provincia de Buenos Aires. Gobernación. Comisión de Investigaciones Científicas; Argentina. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo. Cátedra de Morfología Vegetal; Argentina
dc.description.fil
Fil: Ramos Giacosa, Juan Pablo. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata; Argentina. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo. Cátedra de Morfología Vegetal; Argentina
dc.description.fil
Fil: Yañez, Agustina. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Parque Centenario. Museo Argentino de Ciencias Naturales “Bernardino Rivadavia”; Argentina. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo. Cátedra de Morfología Vegetal; Argentina
dc.description.fil
Fil: Giudice, Gabriela Elena. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo. Cátedra de Morfología Vegetal; Argentina
dc.journal.title
American Fern Journal
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dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/http://dx.doi.org/10.1640/0002-8444-106.4.231
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/url/http://www.bioone.org/doi/10.1640/0002-8444-106.4.231
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