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Fig. 4 | BMC Evolutionary Biology

Fig. 4

From: The pivotal role of aristaless in development and evolution of diverse antennal morphologies in moths and butterflies

Fig. 4

Regulation of al expression by WNT and Notch signalings in the B. mori antenna. (a-a”) An arm-depleted antennal primordium stained by the anti-Al (magenta) and Arm (green) antibodies. (a’, a”) Magnification of the region boxed by a broken line in (a). Only Al staining channel is shown in (a”). Al signals are not detected (bracket) in arm-depleted region (judged by the absence of the anti-Arm signals and surrounded by white line). (b-b”) An Notch-depleted antennal primordium stained by the anti-Al (magenta) and Notch (green) antibodies. (b’, b”) Magnification of the region boxed by a broken line in (b). Only Al staining channel is shown in (b”). In Notch-depleted region (judged by the absence of the anti-Notch signals and surrounded by white line), ectopic Al staining signals are detected in the region dorsal to (arrowheads) and between (open arrowheads) the normal Al expression domains. Note that the ectopic Al signals are not observed in the ventral region (asterisk). Arrows in (a”) and (b”) indicate the normal Al expression. (c, d) Notch-depleted adult antennae showing severe (c) and mild (d) phenotypes. Note that neighboring branches are fused in several regions in (d). (e) Possible regulatory interaction of al with Dll, WNT signaling and Notch signaling. Scale bar in (a”) represents 200 μm in (a, b) and 50 μm in (a’, a”, b’, b”). Scale bar in (d) represents 500 μm in (c, d)

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