INTERVENTION OF A TUBULIN-LIKE MATERIAL D URING REGENERATION OF THE MARINE PLANARIAN SABUSSOWIA-DIOICA (CLAPAREDE, 1863) (PLATHELMINTHES, TRICLADIDA)

The presence of a material immunologically related to tubulin has been detected in the marine triclad Sabussowia dioica (Claparede, 1863). I ntact planarians and regenerating fragments have been studied. A stron g positive immunoreaction has been signalized during the first 3 days of regeneration. Elements immunologically related to tubulin have been described (shape, size, orientation...) and identified. A counting of cells has revealed a correlation with the mitotic activity. These obs ervations have been interpreted by the existence of cytoskeletal micro tubules activated in regenerating marine planarians. Their interventio n during regeneration contribute to confirm the cell proliferation and directed migration of neoblast theory.