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Oogenesis in the egg-brooding frog Gastrotheca riobambae produces large oocytes with fewer nucleoli and low RNA content in comparison to Xenopus laevis

Abstract:

The dissimilarities between oocytes of the eggbrooding frog, Gastrotheca riobambae, and Xenopus laevis suggest that oogenesis is modified according to the mode of reproduction. Oocytes of G. riobambae are large, yolky, and measure about 3 mm in diameter. In spite of the large oocyte size of Gastrotheca, the amplification of ribosomal genes, the number of nucleoli, and the amount of 18S and 28S rRNA are lower than in Xenopus oocytes. In Gastrotheca, the lower RNA content of oocytes is associated with a slow rate of development. A prolonged period of development is possible due to the protection given by the maternal pouch. © 1986, International Society of Differentiation. All rights reserved.

Año de publicación:

1986

Keywords:

    Fuente:

    scopusscopus
    googlegoogle

    Tipo de documento:

    Article

    Estado:

    Acceso restringido

    Áreas de conocimiento:

    • Biología del desarrollo
    • Biología

    Áreas temáticas:

    • Invertebrados
    • Mollusca y Molluscoidea
    • Animales

    Contribuidores:

    Hofmann A.Hofmann A.
    Dreyer C.Dreyer C.
    Eugenia M. del PinoEugenia M. del Pino
    Trendelenburg M.Trendelenburg M.
    Steinbeisser H.Steinbeisser H.
    Campos M.Campos M.