ISSN:
1432-041X
Keywords:
Ultraviolet irradiation
;
Amphibian
;
Grey crescent
;
Embryology
Source:
Springer Online Journal Archives 1860-2000
Topics:
Biology
Notes:
Summary Work by others has shown that ultraviolet (UV) irradiation of the vegetal half of the uncleaved frog egg causes defects in neural development. We find that the earliest effect of irradiation ofRana pipiens eggs is to prevent grey crescent formation, the first indication of dorso-ventral polarization of the egg. The UV effect on the grey crescent and on neural development shows similarities in timing, dose-responses, and reversal by cold. We suggest that the UV effect on neural morphogenesis may be caused by the inhibition of cortical-cytoplasmic movement involved in grey crescent formation.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF00848569
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