info:eu-repo/semantics/article
The oogonial aperture of Oedogonium decipiens var. decipiens (Oedogoniales, Chlorophyta) and its systematic significance
Fecha
2009-04Registro en:
Alberghina, Josefina Silvia; Vélez, Carlos Guillermo; Vigna, Maria Susana; The oogonial aperture of Oedogonium decipiens var. decipiens (Oedogoniales, Chlorophyta) and its systematic significance; Springer Wien; Plant Systematics and Evolution; 280; 1-2; 4-2009; 99-104
0378-2697
CONICET Digital
CONICET
Autor
Alberghina, Josefina Silvia
Vélez, Carlos Guillermo
Vigna, Maria Susana
Resumen
According to traditional taxonomical criteria, the fertilization aperture in the genus Oedogonium has been classified into pore or circumcision type. To contribute with information useful to clarify the systematics of the Oedogoniales, we have studied the oogonial aperture in O. decipiens var. decipiens showing a circumcision in median position. The aperture mechanism and associated structures (line of weakness and thin layer) are similar to those previously described in O. cardiacum. The type and position of the aperture in mature oogonia was also studied in other seven Oedogonium species. In all the analyzed species, the fertilization aperture occurs along the line of weakness, but they would differ only in the opening degree of this line. Therefore, the types of oogonial aperture would not be so different as to discriminate groups of species belonging to the genus Oedogonium, in agreement with a previous molecular phylogenetic study of this group of algae.