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- Title
G protein-linked receptors and induction of metamorphosis in Bugula stolonifera (Bryozoa).
- Authors
Bertrand, Jean-François; Woollacott, Robert M.
- Abstract
Induction of metamorphosis in larvae of the marine bryozoan Bugula stolonifera was examined for potential roles of G protein-linked cell-surface receptors. Two compounds that modulate components of the G protein system were tested in a bath-applied experimental design over concentrations of 10[sup-8] to 10[sup-3] M, plus a seawater control, and 2 controls to assess meta-morphic competence (10 mM excess KCl and a biofilmed surface). The G protein activator Gpp[NH]p and the G protein inhibitor GDP-β-s did not affect rates of metamorphosis, under the conditions tested. We found no evidence that G protein-linked cell-surface receptors are the receptors of the metamorphic cue in this species. This negative finding parallels reports on a gastropod and a polychaete; by contrast, G proteins are involved in metamorphic induction in several cnidarians, a nematode, and barnacles. Thus, as no single model can account for induction across phyla, our results may serve to focus attention on identifying possible roles of the other 2 major classes of cell-surface receptors in triggering metamorphosis in B. stolonifera and other invertebrates.
- Subjects
BRYOZOA; METAMORPHOSIS; DEVELOPMENTAL biology; G proteins; MARINE invertebrates -- Metamorphosis
- Publication
Invertebrate Biology, 2003, Vol 122, Issue 4, p380
- ISSN
1077-8306
- Publication type
Article
- DOI
10.1111/j.1744-7410.2003.tb00102.x