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      Fase gametofítica del helecho Llavea cordifolia (Pteridaceae).

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          Abstract

          Se describen las características morfológicas de la fase sexual de L. cordifolia, género monotípico, de distribución en México, Guatemala y Costa Rica. Se recolectaron plantas fertiles de los estados de Veracruz y Puebla, los cultivos se hicieron in vitro observando poblaciones de creciendo en cajas de Petri. La germinación que presenta es tipo-Vittaria, formando un filamento uniseriado de hasta cuatro células. El desarrollo protálico es tipo-Adiantum. Los protalos son cordado-espatulado a cordiformes y alcanzan la madurez sexual de 60-160 días. Los gametangios son del modelo común de los helechos leptosporangiados.

          Translated abstract

          The development and sexual phase characteristics of Llavea cordifolia, a genus that is monotypic to Mexico, Guatemala and Costa Rica.The spores were collected from Veracruz and Puebla, the culture was in vitro on the basis of gametophyte population growing in petri dishes. Spore germination is of the Vittaria-type, resulting in a uniseriate gametophytic filament of four cells. Prothallial development is of the Adiantum-type. The protallus is cordate-spatulate to cordate and reaches sexual maturity in 60-160 days. The gametangia are of the common leptosporangiate-type.

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          Most cited references18

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          Ferns and Allied Plants

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            Reproductive Biology of the Pteridophyta. III. A study of the Blechnaceae

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              Reproductive biology of the Pteridophyta. III. A study of the Blechnaceae

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                Author and article information

                Contributors
                Role: ND
                Role: ND
                Role: ND
                Journal
                rbt
                Revista de Biología Tropical
                Rev. biol. trop
                Universidad de Costa Rica (San José )
                0034-7744
                March 2000
                : 48
                : 1
                : 19-23
                Affiliations
                [1 ] Universidad Autónoma Metropolitana Mexico
                Article
                S0034-77442000000100003
                e7a53583-7fdb-49c0-8a92-7c96b11943cf

                http://creativecommons.org/licenses/by/4.0/

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                Product

                SciELO Costa Rica

                Self URI (journal page): http://www.scielo.sa.cr/scielo.php?script=sci_serial&pid=0034-7744&lng=en
                Categories
                Biodiversity Conservation
                Biology

                General life sciences,Animal science & Zoology
                Gametophytes,monotypic,morphogenesis,sexual phase,Pteridaceae,Llavea

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