Abstract
The egg cortex, though poorly defined (11), is often implicated as an important determinant of morphogenesis in amphibian and mollusc development (13, 14). Recently, for example, Arnold (1) has demonstrated that irradiation of the squid egg cortex with a UV microbeam specifically inhibits development of embryonic eyes and arms. The grey crescent cortical region of the amphibian egg is well known as the organization center for the primary neural axis of the embryo. Pasteels (13), reviewing experiments on amphibian eggs, postulates a yolk-cortex interaction system as a causal factor in establishing the axial organization in the embryo, a view formulated earlier by Dalcq and Pasteels in 1936. Curtis (4, 5) reported the induction of a secondary embryonic axis after transplantation of the grey crescent cortex at the fertilized egg stage in Xenopus. Although his experiments were few in number and have not been repeated, the results support the view of the grey crescent cortex as a site for organization and storage of developmental information.
This research was supported by AEC contract AT (45-1)-2011.
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Grant, P. (1969). Nucleo-Cortical Interactions During Amphibian Development. In: Mizell, M. (eds) Biology of Amphibian Tumors. Recent Results in Cancer Research, vol 1969. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-85791-1_4
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