Roux's archives of developmental biology

, Volume 201, Issue 3, pp 169–172 | Cite as

Heat shock as inducer of metamorphosis in marine invertebrates

  • Michael Kroiher
  • Michael Walther
  • Stefan Berking
Original Articles

Summary

In most sessile marine invertebrates, metamorphosis is dependent on environmental cues. Here we report that heat stress is capable of inducing metamorphosis in the hydroid Hydractinia echinata. The onset of heat-induced metamorphosis is correlated with the appearance of heat-shock proteins. Larvae treated with the metamorphosis-inducing agents Cs+ or NH4+ also synthesize heat-shock proteins. In heat-shocked larvae, the internal NH4+-concentration increases. This fits the hypothesis that methylation plays a central role in control of metamorphosis. In the tunicate Ciona intestinalis, a heat shock is able to induce metamorphosis too.

Key words

Heat-shock proteins Metamorphosis Invertebrates Hydractinia echinata Ciona intestinalis 

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Copyright information

© Springer-Verlag 1992

Authors and Affiliations

  • Michael Kroiher
    • 1
  • Michael Walther
    • 1
  • Stefan Berking
    • 1
  1. 1.Zoologisches Institut der Universität KölnKöln 41Federal Republic of Germany
  2. 2.Department of Biological ChemistryUniversity of CaliforniaIrvineUSA

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