| dc.creator | Piñeiro, Maria Raquel | |
| dc.creator | Morbelli, Marta Alicia | |
| dc.date | 2014-08 | |
| dc.date | 2020-07-15T12:23:25Z | |
| dc.date.accessioned | 2023-07-14T19:48:15Z | |
| dc.date.available | 2023-07-14T19:48:15Z | |
| dc.identifier | http://sedici.unlp.edu.ar/handle/10915/100717 | |
| dc.identifier | https://ri.conicet.gov.ar/11336/32660 | |
| dc.identifier | https://revistas.unc.edu.ar/index.php/BSAB/article/view/7819 | |
| dc.identifier | issn:1851-2372 | |
| dc.identifier.uri | https://repositorioslatinoamericanos.uchile.cl/handle/2250/7436750 | |
| dc.description | La familia Equisetaceae se haya representada en el Noroeste de Argentina por el género Equisetum Michx. ex DC con dos especies, E. bogotense Kunth y E. giganteum L. El estudio se realizó en base a material de herbario y fresco. Las observaciones se realizaron con microscopios óptico y electrónicos de barrido y transmisión. Las esporas son esferoidales, miden 35-64 µm de diámetro ecuatorial, su citoplasma posee clorofila. En ambas especies, las esporas presentan una estructura abertural circular y a ambos lados de la misma poseen un par de eláteres acintados de extremos espatulados, no resistentes al tratamiento de acetólisis. La esporodermis consta de dos paredes, perisporio, delgado, ornamentado, con dos estratos, de 930 nm-1,2 µm de espesor, y exosporio, de 1,4- 3,1 µm de espesor, compacto, con dos estratos y superficie levemente ondulada o plegada. Entre ambas paredes se ha observado una capa intermedia de naturaleza laxa, y diferente espesor en esporas con distintos estadios de maduración. Las esporas son similares, en ambas especies, en cuanto a la forma y ultraestructura de la esporodermis; se observan diferencias en el tamaño de las mismas. | |
| dc.description | Spore morphology and wall ultrastructure in Equisetaceae spores (Equisetopsida) from north-western Argentina. The family Equisetaceae is represented in the study area by the genus Equisetum with two species, E. bogotense and E. giganteum. The study was based on herbarium and fresh specimens and the spores were studied under light microscope, scanning and transmission electron microscopes. The spores are spheroid, 35-64 µm in equatorial diameter, the cytoplasm has chlorophyll. In both species studied, the spores have a circular and small unique type of aperture which at both sides of the aperture, in the outer side have two thread-like elaters, spathulate. These structures are non-resistant to the acetolysis treatment. The sporoderm is composed of two walls, perispore, 930 nm-1,2 µm thick, ornamented, with two layers in section. The exospore is two layered, compact, 1,4-3,1 µm thick, slightly wave-like. Between both walls was observed an intermediate layer composed of a laxe structure, in spores in different stages of maturation. In both species, the spores are similar in the shape and sporoderm ultrastructure while differences were found in spore sizes. | |
| dc.description | Facultad de Ciencias Naturales y Museo | |
| dc.format | application/pdf | |
| dc.format | 34-40 | |
| dc.language | es | |
| dc.rights | http://creativecommons.org/licenses/by-nc-sa/4.0/ | |
| dc.rights | Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0) | |
| dc.subject | Botánica | |
| dc.subject | Biología | |
| dc.subject | Equisetaceae | |
| dc.subject | Equisetum | |
| dc.subject | Argentina | |
| dc.subject | Esporas | |
| dc.subject | Morfología | |
| dc.subject | Ultraestructura | |
| dc.subject | Spores | |
| dc.subject | Morphology | |
| dc.subject | Ultrastructure | |
| dc.title | Morfología y ultraestructura de las esporas de las Equisetaceae (Equisetopsida) del Noroeste de Argentina | |
| dc.type | Articulo | |
| dc.type | Articulo | |
