Desarrollo del gametofito de Pteris berteroana (Pteridaceae: Pterideae)
artículo original
Autor
Mendoza Ruiz, Aniceto
Pérez García, Blanca
Reyes Jaramillo, Irma
Ricci, Marcia
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El desarrollo y características de la fase sexual de Pteris berteroana. helecho endémico del Archipiélago Juan Femández. Chile, es presentado. Su patrón de germinación es del tipo Vittaria, resultando un gametofito filamentoso uni!ieriado de 3-5 células. El desarrollo protálico es del tipo Ceriltopteris por presentar una zona meristemática lateral que genera un gametofito asimétrico con alas desiguales. El protalo alcanza la madurez sexual entre 120-150 días. Los gallletangios son del tipo leptosporangiado. En los cultivos se optuvieron esporofitos. The development and characteristics of the sexual phase of Pteris berteroana, endemic to the Archipielago Juan Femandez, Chile, are reported. Spore gennination is of the Vittaria-type, resulting in a uniseriate gametophytic filament of three to five ceUs. Prothallial development is of the Ceratopteris-type, by the development of a meristematic lateral lOne, the young prothallus is asymmetric with unequal wings. The prothallia reaches sexual maturity in 120- ISO days. The gametangia are of (he common leptosporangiate-type. Sporophyte development was observed. The described morphogenetic characteristics of P. berteroana such as types of gennination, prothallial development and gametangia, as well as the cordiform thallus, are evolutionarily derived ("advanced") characters shared by several groups of homosporic fems.
Colecciones
- Revista de Biología Tropical [2107]