title: The defensive function of trichocysts in Paramecium tetraurelia against metazoan predators compared with the chemical defense of two species of toxin-containing ciliates.
abstract: The time-honored assumption about the defensive function of trichocysts in Paramecium against predators was recently verified experimentally against different species of unicellular predators. In the present study, we examined the defensive function of trichocysts against three metazoan predators, Cephalodella sp. (Rotifera), Eucypris sp. (Arthropoda), and Stenostomum sphagnetorum (Platyhelminthes). The results confirmed the defensive function of trichocysts against two of these metazoan predators (Cephalodella sp. and Eucypris sp.), while they seem ineffective against S. sphagnetorum. We also compared the defensive efficiency of the trichocysts of P. tetraurelia with that of toxin-containing extrusomes of two ciliates.
authors.affiliation: Laboratory of Protistology and Biology Education, University of Macerata, Macerata 62100, Italy. federico.buonanno@unimc.it
authors.forename: Federico
authors.initials: F
authors.lastname: Buonanno
authors.forename: Terue
authors.initials: T
authors.lastname: Harumoto
authors.forename: Claudio
authors.initials: C
authors.lastname: Ortenzi
mesh_terms: D000818:Animals; D001181:Arthropods / Q000187:drug effects; D006873:Hydroquinones / Q000633:toxicity*; D015394:Molecular Structure; D016805:Paramecium tetraurelia / Q000166:cytology* / Q000502:physiology*; D010986:Platyhelminths / Q000187:drug effects; D011235:Predatory Behavior / Q000187:drug effects*; D012118:Resorcinols / Q000633:toxicity*; D012403:Rotifera / Q000187:drug effects; D014118:Toxins, Biological / Q000737:chemistry / Q000633:toxicity
chemical_list: D006873:Hydroquinones; D012118:Resorcinols; D014118:Toxins, Biological; C453475:climacostol