title: [Role of the cell nucleus in the mechanism of the effect of auxin on Acetabularia mediterranea].
abstract: The effect of an auxin, naphthyl acetic acid (NAA), upon nuclear and anuclear fragments of adult Acetabularia cells was studied. In the darkness, NAA stimulated the release from the nucleus to the cytoplasm of informational agents programming the formation of caps and exerted no marked effect upon the anuclear fragments. NAA activated RNA synthesis and accelerated the decrease of its content in the nucleus. A suggestion is put forward to the effect that NAA influences the morphogenesis (cap regeneration) while strengthening the synthesis and passage from the nucleus to the cytoplasm of agents, apparently, of ribonucleic nature responsible for the formation of caps.
mesh_terms: D000076:Acetabularia / Q000502:physiology; D002467:Cell Nucleus / Q000378:metabolism / Q000502:physiology*; D003609:Dactinomycin / Q000494:pharmacology; D007210:Indoleacetic Acids / Q000494:pharmacology*; D009024:Morphogenesis / Q000187:drug effects*; D009280:Naphthaleneacetic Acids / Q000494:pharmacology*; D010937:Plant Growth Regulators / Q000494:pharmacology*; D012313:RNA / Q000096:biosynthesis; D014529:Uridine / Q000378:metabolism
chemical_list: D007210:Indoleacetic Acids; D009280:Naphthaleneacetic Acids; D010937:Plant Growth Regulators; D003609:Dactinomycin; D012313:RNA; D014529:Uridine
vernacular_title: Rol' kletochnogo iadra v mekhanizme deĭstviia auksina na Acetabularia mediterranea.