Fig. 10
- ID
 - ZDB-FIG-140319-22
 - Publication
 - Strähle et al., 1993 - Ultraviolet irradiation impairs epiboly in zebrafish embryos: evidence for a microtubule-dependent mechanism of epiboly
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 Nocodazole, a microtubule-depolymerizing agent, mimics the effect of UV. (A) An untreated embryo at 50% epiboly. A sibling, incubated in 1 μg/ml nocodazole, has reached only 30% epiboly (B). (C,D) Observations made at a later stage, when controls have just completed epiboly. 2 μg/ml of nocodazole caused the blastoderm to pinch off the yolk cell (C), while 1 μg/ml caused severe retardation of epiboly (D). At 12 hours after fertilization, when untreated embryos have long finished epiboly (E), an embryo treated with 0.6 μg/ml has still not closed the blastopore (F, arrowhead). Although epiboly is retarded, a distinct axis has formed, with somitogenesis well underway.  |