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. 2014 Mar 5;3:e01440. doi: 10.7554/eLife.01440

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Copyright © 2014, Rosenberg et al

This article is distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use and redistribution provided that the original author and source are credited.

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Figure 7. — (A) Blastoderm embryo with two double-segment periodicity stripes of Nv hairy expression. Note that stripe 2 is broader and stronger than stripe 1. (B) Blastoderm embryo showing four double-segment periodicity stripes of expression plus an anterior accumulation of Nv hairy transcripts (arrowhead). (C) Dorsal view of embryo as in (B), illustrating the dorsal anterior expression (arrowhead) that is activated in the same pattern as the anterior domain of Nv tailless (Lynch et al., 2006). (D) Blastoderm embryo with strong anterior and dorsal anterior expression of Nv hairy and five pair-rule stripes. (E) Dorsal view of embryo as in (D) with increased dorsal anterior expression of Nv hairy, and the anterior spreading of expression from the anterior of double-segment pair-rule stripe 1. (F) Blastoderm embryo with expanding anterior domain (line), five double-segment ‘pair-rule’ stripes, and two additional stripes coming up. Note that the anterior domain between stripe 1 and the anterior pole is becoming more continuous in expression. (G) Dorsolateral view of embryo as in (F) highlighting the dorsal anterior expression. Stripe 2 is still wider than other stripes. Stripe 6 appears to be of single-segment periodicity. (H) Early gastrula embryo exhibiting a non-homogenous but largely continuous anterior cap of Nv hairy expression (that includes stripe 1). Four additional double-segment stripes and three single-segment stripes (two derived from stripe 6) are now evident. (I) Dorsal view of embryo slightly older than embryo in (H) showing the nearly continuous head domain, and the apparent splitting of stripe 1 within that domain. Double-segment stripes are thinning. (J) Dorsolateral view of extending germ-band embryo. Head domain is continuous (line). Stripes 1–7 have single-segment periodicity, are of non-uniform strength; stripe eight appears darker and broader. (K) Germ-band extending embryo with a continuous head domain (line) and eight discrete stripes. (L) Dorsolateral view of germ-band extending embryo. Stripe 8 is expanded into a wedge abutting the pole cells, and the anterior domain is expanding to include stripe 2. (M) Germ-band extension embryo with expanding anterior domain, that extends to include stripe 3 (arrowhead). Posterior domain is expanded. (N) Dorsolateral view of embryo as in (M) showing further expansion of posterior stripe 8 domain (line). (O) Germ-band-retracted embryo exhibiting ubiquitous staining with striated expression evident.

DOI: http://dx.doi.org/10.7554/eLife.01440.016

Figure 7—figure supplement 1. — (A) Blastoderm embryo with two double-segment periodicity stripes of Nv hairy expression. Note that stripe 2 is broader and stronger than stripe 1. (B) Blastoderm embryo showing four double-segment periodicity stripes of expression plus an anterior accumulation of Nv hairy transcripts (arrowhead). (C) Dorsal view of embryo as in (B), illustrating the dorsal anterior expression (arrowhead) that is activated in the same pattern as the anterior domain of Nv tailless (Lynch et al., 2006). (D) Blastoderm embryo with strong anterior and dorsal anterior expression of Nv hairy and five pair-rule stripes. (E) Dorsal view of embryo as in (D) with increased dorsal anterior expression of Nv hairy, and the anterior spreading of expression from the anterior of double-segment pair-rule stripe 1. (F) Blastoderm embryo with expanding anterior domain (line), five double-segment ‘pair-rule’ stripes, and two additional stripes coming up. Note that the anterior domain between stripe 1 and the anterior pole is becoming more continuous in expression. (G) Dorsolateral view of embryo as in (F) highlighting the dorsal anterior expression. Stripe 2 is still wider than other stripes. Stripe 6 appears to be of single-segment periodicity. (H) Early gastrula embryo exhibiting a non-homogenous but largely continuous anterior cap of Nv hairy expression (that includes stripe 1). Four additional double-segment stripes and three single-segment stripes (two derived from stripe 6) are now evident. (I) Dorsal view of embryo slightly older than embryo in (H) showing the nearly continuous head domain, and the apparent splitting of stripe 1 within that domain. Double-segment stripes are thinning. (J) Dorsolateral view of extending germ-band embryo. Head domain is continuous (line). Stripes 1–7 have single-segment periodicity, are of non-uniform strength; stripe eight appears darker and broader. (K) Germ-band extending embryo with a continuous head domain (line) and eight discrete stripes. (L) Dorsolateral view of germ-band extending embryo. Stripe 8 is expanded into a wedge abutting the pole cells, and the anterior domain is expanding to include stripe 2. (M) Germ-band extension embryo with expanding anterior domain, that extends to include stripe 3 (arrowhead). Posterior domain is expanded. (N) Dorsolateral view of embryo as in (M) showing further expansion of posterior stripe 8 domain (line). (O) Germ-band-retracted embryo exhibiting ubiquitous staining with striated expression evident.

DOI: http://dx.doi.org/10.7554/eLife.01440.016