title: Cytoplasmic cleavage during zoosporogenesis in Thraustochytrium sp.: ultrastructure and the effects of colchicine and D2O.
abstract: Subplasmalemma microtubules were present in the cleavage furrows during zoosporogenesis in Thraustochytrium sp. The microtubules transversed the furrows but were not at right angles to nor circumferentially arranged in the plane of cleavage. Evidence of microtubule-plasmalemma bridges was found. Colchicine and deuterium oxide inhibited cleavage. The data suggested that microtubules had a motive rather than a structural function.
mesh_terms: D002455:Cell Division / Q000187:drug effects; D003078:Colchicine / Q000494:pharmacology*; D003593:Cytoplasm / Q000648:ultrastructure; D003903:Deuterium / Q000494:pharmacology*; D005658:Fungi / Q000254:growth & development / Q000648:ultrastructure*; D008854:Microscopy, Electron; D008870:Microtubules / Q000648:ultrastructure; D008954:Models, Biological; D013172:Spores, Fungal / Q000254:growth & development / Q000648:ultrastructure
chemical_list: D003903:Deuterium; D003078:Colchicine