299Slack JMW (1991) From egg to embryo: regional specification in early development. Cambridge
University Press, Cambridge
Slusarski D, Yang-Snyder JA, Busa W, Moon R (1997a) Modulation of embryonic intracellular
Ca2+ signaling by Wnt-5A. Dev Biol 182:114–120
Slusarski DC, Corces VG, Moon RT (1997b) Interaction of Wnt and a Frizzled homologue triggers
G-protein-linked phosphatidylinositol signalling. Nature 390:410–413. doi:10.1038/37138
Smith JC (1989) Mesoderm induction and mesoderm-inducing factors in early amphibian develop-
ment. Development 105:665–677
Smith JC, Dale L, Slack JM (1985) Cell lineage labels and region-specific markers in the analysis
of inductive interactions. J Embryol Exp Morphol 89(Suppl):317–331
Smith W, Harland R (1992) Expression cloning of noggin, a new dorsalizing factor localized to the
Spemann organizer in Xenopus embryos. Cell 70:829–840
Smith WC, Harland RM (1991) Injected Xwnt-8 RNA acts early in Xenopus embryos to promote
formation of a vegetal dorsalizing center. Cell 67:753–765
Smith WC, McKendry R, Ribisi S, Harland RM (1995) A nodal-related gene defines a physical
and functional domain within the Spemann organizer. Cell 82:37–46
Snow M (1977) Gastrulation in the mouse: growth and regionalization of the epiblast. Development
42:293–303
Sokol S (1996) Analysis of Dishevelled signalling pathways during Xenopus development. Curr
Biol 6:1456–1467
Sokol S, Christian JL, Moon RT, Melton DA (1991) Injected Wnt RNA induces a complete body
axis in Xenopus embryos. Cell 67:741–752
Solnica-Krezel L (2005) Conserved patterns of cell movements during vertebrate gastrulation.
Curr Biol 15:R213–R228. doi:10.1016/j.cub.2005.03.016
Solnica-Krezel L, Driever W (1994) Microtubule arrays of the zebrafish yolk cell: organization
and function during epiboly. Development 120:2443–2455
Solnica-Krezel L, Sepich DS (2012) Gastrulation: making and shaping germ layers. Annu Rev
Cell Dev Biol 28:687–717. doi:10.1146/annurev-cellbio-092910-154043
Spemann H (1938) Embryo development and induction. Yale University Press, New Haven
Spemann H (1931) Über den Anteil von Implantat und Wirtskeim an der Orientierung und
Beschaffenheit der induzierten Embryonalanlage. Wilhelm Roux' Arch Entwicklungsmech
123:389–517. doi:10.1007/BF01380646
Spemann H (1918) Über die Determination der ersten Organanlagen des Amphibienembryo I–
VI. Wilhelm Roux' Arch Entwicklungsmech 43:448–555. doi:10.1007/BF02267308
Spemann H (1921) Die Erzeugung tierischer Chimären durch heteroplastische embryonale
Transplantation zwischen Triton cristatus und taeniatus. Wilhelm Roux' Arch Entwicklungsmech
48:533–570. doi:10.1007/BF02554578
Spemann H (1903) Entwickelungsphysiologische Studien am Triton-Ei. Wilhelm Roux' Arch
Entwicklungsmech 16:551–631. doi:10.1007/BF02301267
Spemann H, Mangold (1924) Über Induktion von Embryonenanlagen durch Implantation artfrem-
der Organisatoren. Wilhelm Roux' Arch EntwMech Org 100:599–638
Spratt NT, Haas H (1960) Integrative mechanisms in development of the early chick blastoderm. I.
Regulative potentiality of separated parts. J Exp Zool 145:97–137
Srinivas S, Rodriguez T, Clements M et al (2004) Active cell migration drives the unilateral move-
ments of the anterior visceral endoderm. Development 131:1157–1164. doi:10.1242/dev.01005
Standley HJ, Gurdon JB (2004) The community effect in Xenopus development. In: H. Grunz (Ed.)
The vertebrate organizer. Springer, Berlin, Heidelberg, pp 73–91
Stern CD (1990) The marginal zone and its contribution to the hypoblast and primitive streak of
the chick embryo. Development 109:667–682
Stern CD (2004) Gastrulation in the chick. From Cells to Embryo, Gastrulation
Stern CD (2006) Neural induction: 10 years on since the “default model”. Curr Opin Cell Biol
18:692–697. doi:10.1016/j.ceb.2006.09.002
Stern CD (2005) Neural induction: old problem, new findings, yet more questions. Development
132:2007–2021. doi:10.1242/dev.01794
6 Vertebrate Axial Patterning: From Egg to Asymmetry