Abstract
We cloned and analysed the expression of a SoxB gene (PvuSoxB) in the marine mollusc, Patella vulgata. Like its orthologues in deuterostomes, after an early broad ectodermal distribution, PvuSoxB expression only persists in cells competent to form neural structures. In the post-gastrulation larva, PvuSoxB is expressed in the prospective neuroectoderm in the head and in the trunk. No expression can be seen dorsally, around the mouth and the anus, or along the ventral midline. We also report the expression of a Wnt2/13 orthologue (PvuWnt2) in Patella. After gastrulation, PvuWnt2 is expressed in the posterior part of the mouth, along the ventral midline and around the anus. This expression seems to be complementary to that of PvuSoxB in the trunk. We suggest the existence of a fundamental subdivision of the Patella trunk ectoderm into midline (mouth, midline, anus) and more lateral structures.
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Acknowledgements
We thank André van Loon for making available the Patella vulgata cDNA library. We thank Alain Ghysen, Valérie Ledent, Guillaume Balavoine, and Benjamin Prud’homme for helpful comments on the manuscript. This work has been supported by the CNRS and the Ministère de la Recherche (ACI Biologie et Physiologie du développement).
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Le Gouar, M., Guillou, A. & Vervoort, M. Expression of a SoxB and a Wnt2/13 gene during the development of the mollusc Patella vulgata . Dev Genes Evol 214, 250–256 (2004). https://doi.org/10.1007/s00427-004-0399-z
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DOI: https://doi.org/10.1007/s00427-004-0399-z