Morfogénesis de la fase sexual de Blechnum chilense y Blechnum cycadifolium (Pterophyta: Blechnaceae)
Date
Authors
Pérez García, Blanca
Mendoza Ruiz, Aniceto
Ricci, Marcia
Journal Title
Journal ISSN
Volume Title
Publisher
Universidad de Costa Rica
Abstract
Description
Se presentan los estudiosrnorfogenéticos de la fase sexual de Blechnum chilense y B. cycadifolium. Las esporas de ambas especies son monoletas, elipsoidales, no clorofílicas y su germinación es déltipo Vittaria. El patrón de desarrollo protálico de B. cycadifolium es del tipo Aspidium por presentar tricomas unicelul&"es, papilados y secretores y el de B. chilense es del tipo Á;{iiantum por carecer de tricomas. El gametofito adulto de B. cycadifolium es cordiforme- espatulado y piloso y el de B. chilense es cordiforme- reniforme y glabro. En E. chilense los gametangios son del tipo común presente en los helechos leptosporangiados y las primeras hojas se formaron a los 4 meses y medio en B. chilense y a los 7 meses en B. cycadifolium.
The results of morphogenetic studies of the sexual phase of Blechnum chilense and B. cycadifolium are presented in this paper. In both species the spores are monolete, ellipsoidal, non-chIorophyllous, and the germination is of the Vittaria-type. The development pattern of the prothallia is of the Aspidium-type in B. cycadifolium for the unicellular, papilated and secretory trichomes, and the Adiantum-type in B. chilense, whose prothallia are naked. The adult gametophyte of B. cycadifolium is cordate-spatulate and with trichomes and in B. chilense, it is cordate-reniform and naked. The gametangia of B. chilense are of the common type of the leptosporangiate ferns. The first leaves appeared after 4'/2 months in B. chilense and in B. cycadifolium after 7 months of culture.
The results of morphogenetic studies of the sexual phase of Blechnum chilense and B. cycadifolium are presented in this paper. In both species the spores are monolete, ellipsoidal, non-chIorophyllous, and the germination is of the Vittaria-type. The development pattern of the prothallia is of the Aspidium-type in B. cycadifolium for the unicellular, papilated and secretory trichomes, and the Adiantum-type in B. chilense, whose prothallia are naked. The adult gametophyte of B. cycadifolium is cordate-spatulate and with trichomes and in B. chilense, it is cordate-reniform and naked. The gametangia of B. chilense are of the common type of the leptosporangiate ferns. The first leaves appeared after 4'/2 months in B. chilense and in B. cycadifolium after 7 months of culture.
Keywords
blechnaceae, blechnum, Chile, gametophytes, morphogenesis, sexual phase, South America, pteridophyta