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| Piñeiro,María Raquel; Morbelli,Marta A. |
| 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... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Equisetaceae; Equisetum; Argentina; Esporas; Morfología; Ultraestructura. |
| Ano: 2014 |
URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S1851-23722014000100004 |
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| Ramos Giacosa,Juan P; Morbelli,Marta A; Giudice,Gabriela E. |
| The spores of Schizaea fistulosa from Chile were studied using light microscopy (LM), scanning (SEM) and transmission electron microscopy (TEM). The spores are monolete and elliptic in polar view. The major equatorial diameter is 71-85 µm and the polar diameter is 54-61 µm. The laesurae are 50-60 µm long and, in some cases, bifurcated. The sporoderm ultrastructure is first mentioned and described here. The exospore is two-layered in section, verrucate-tuberculate with single or fused elements forming short ridges. The perispore is single-layered, 10-30 nm thick and it is only visible under transmission electron microscopy. On the spore surface, numerous, single or fused, spheroids and nanospheroids of different sizes were observed attached to the perispore... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Schizaeaceae; Schizaea fistulosa; Spores; Morphology; Ultrastructure. |
| Ano: 2015 |
URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S1851-23722015000100003 |
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