title: Induction of metamorphosis by bacteria and by a lithium-pulse in the larvae ofHydractinia echinata (Hydrozoa).
abstract: The planulae ofHydractinia, the metamorphosis of which normally is induced by certain bacteria, will undergo transformation into polyps also when exposed to a lithiumpulse. The optimal concentration and incubation period for rapid and complete transformation have been determined at 24 mM Li+and 2 hrs respectively. 96 mM K+applied for 2 hrs will also result in some induction. The possible mode of action exerted by the Li-ion as compared with induction caused by bacteria is discussed.
authors.affiliation: Zoologisches Institut der Technischen Universität Braunschweig, Deutschland.|Abteilung Biologie der Universität, D-7900, Ulm Oberer Eselsberg, Deutschland.
authors.forename: Klaus -Dieter
authors.initials: K-
authors.lastname: Spindler
authors.affiliation: Zoologisches Institut der Technischen Universität Braunschweig, Deutschland.
authors.forename: Werner A
authors.initials: WA
authors.lastname: Müller