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Effetti dell'ablazione della regione caudale sulla migrazione dei gonociti nelle creste genitali in embrioni e larve di Bufo bufo

Foscarina Di Grande — 1980

Atti della Accademia Nazionale dei Lincei. Classe di Scienze Fisiche, Matematiche e Naturali. Rendiconti

In young embryos of Bufo bufo toad some germ cells are localized in the most dorso-caudal part of the endodermic mass. The ablation of this part produces a reduction of the number of germ cells migrating in the genital ridges, and a reduction of the length of genital bodies and mesonephros. By multiplication of residual germ cells, genital ridges subsequently differentiate, as in normal specimens, a Bidder organ in their cephalic tract and a reduced gonad in their caudal tract.

Modalità della sterilizzazione degli abbozzi genitali in girini di Bufo bufo panirradiati con raggi X in stadi embrionali

Foscarina Di Grande — 1971

Atti della Accademia Nazionale dei Lincei. Classe di Scienze Fisiche, Matematiche e Naturali. Rendiconti

Bufo bufo embryos were subjected to 800r X-ray panirradiation at the III stage and killed for the histological examination stage by stage in the following days. In their genital bodies the number of germ-cells persists almost unchanged during the first 16 days. Then, at the larval stages in which, in normal developmental conditions, should have begun the mitotic multiplication of germ-cells, their number suddenly decreases to complete sterility.

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