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Figure 8 | EvoDevo

Figure 8

From: Cap’n’collar differentiates the mandible from the maxilla in the beetle Tribolium castaneum

Figure 8

Tc-Dfd knockdown results in the loss of Tc-prd expression in the embryonic mandibular and maxillary segments. Tc-Dfd patterns the endites of the mandibular and maxillary segments. The mandibular segment appendage is marked with an arrowhead. The maxillary endites are marked with arrows in wild-type embryos (A,B). The labial endites are marked with white arrowheads. (A) Expression of Tc-prd (blue) and Tc-Dfd (red) in a wild-type germ band extending embryo. Tc-prd is expressed in the developing endites of the mandible and maxilla. Tc-Dfd is expressed in the mandibular and maxillary segments. (B) Expression of Tc-prd (red) and Tc-Dll (blue) in a wild-type germ band extending embryo. Tc-prd is expressed in the mandible, maxillary and labial appendages. Tc-Dll is expressed in the lacinea endite lobe. There is no Tc-Dll expression in the mandible (arrowhead). (C,D) Expression of Tc-prd (red) and Tc-Dll (blue) in a Tc-DfdRNAi germ band extending embryo. (C) The mandible has been transformed into an ectopic antenna, which expresses Tc-Dll (arrowhead) and lacks Tc-prd expression. There is no endite and no Tc-prd expression (asterisk) in the maxilla. The labial appendage has an endite (white arrowhead) marked with Tc-prd expression. (D) Enlargement of the maxilla and labial appendage shown in (C).

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