Morfogénesis del gametotito del helecho Thyrsopteris elegans (Filicales: Thyrsopteridaceae)
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Pérez García, Blanca
Mendoza Ruiz, Aniceto
Riba, Ramón
Ricci, Marcia
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Universidad de Costa Rica
Abstract
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Se presenta el desarrollo morfogénico del gametofito de T. elegans, especie endémica del Archipiélago Juan Femández, Chile. Las esporas son tetraédrico-globosas, triletes. homospóricas, no clorofílicas. La germinación es del tipo Cyathea y el desarrollo protálico corresponde al tipo Drynaría. Los anteridios y los arquegonios corresponden al tipo común de leptosporangiados. Los esporofitos aparecen después de los 200 día
As part of a series about Neotropical and related ferns, the morphogenetic development of Thyrsopteris elegans, an endemic species of the Archipelago Juan Fernandez Chile, is presented. The spores are tetrahedral-globose, trilete, homosporous, non-green. The germination of the spores is of the Cyathea-type and the prothallial development corresponds to the Drynaria-type. The antheridia and the archegonia are typical of the leptosporangiate ferns. The sporophyte appears 200 days after sowing. Apogarny was not observed in this species
As part of a series about Neotropical and related ferns, the morphogenetic development of Thyrsopteris elegans, an endemic species of the Archipelago Juan Fernandez Chile, is presented. The spores are tetrahedral-globose, trilete, homosporous, non-green. The germination of the spores is of the Cyathea-type and the prothallial development corresponds to the Drynaria-type. The antheridia and the archegonia are typical of the leptosporangiate ferns. The sporophyte appears 200 days after sowing. Apogarny was not observed in this species