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- W3204989907 abstract "Abstract Butterfly wing scale cells can develop very intricate cuticular nanostructures that interact with light to produce structural colors including silvery hues, but the genetic basis of such nanostructures is mostly unexplored. Here, we first identified that optix is necessary for metallic scale development in the butterfly Bicyclus anynana . We then characterized different subtypes of wildtype metallic silver scales and addressed the function of five genes – apterous A, Ultrabithorax, doublesex, Antennapedia , and optix – in the differentiation of silver scales, at a single-cell resolution, by leveraging crispants that exhibited either ectopic gains or losses of silver scales. Wildtype silver scales were generally rounded and had low amounts of pigmentation, exhibiting a common ultrastructural modification for metallic broadband reflectance, i.e., an undulatory air layer enclosed by an upper and lower lamina. Our results indicated that the varying air layer thickness was the important parameter of the bilaminate scale for producing a broadband reflectance across visible wavelengths. While a single lamina of the appropriate thickness could also produce broadband colors, the bilaminate structure is advantageous as it increases the overall reflectivity. Crispant brown scales differed from wildtype silver scales via the loss of the continuous upper lamina, increased lower lamina thickness, and increased pigmentation. The reverse was seen when brown scales became silver. We identified Antennapedia and optix as high-level regulators in the network differentiating different silver scale subtypes and determining overall cell shape in both sexes. In addition, Antp exhibits a novel, post-embryonic role in the determination of ridge and crossrib orientation." @default.
- W3204989907 created "2021-10-25" @default.
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- W3204989907 date "2021-10-19" @default.
- W3204989907 modified "2023-10-14" @default.
- W3204989907 title "<i>Antennapedia</i> and <i>optix</i> regulate metallic silver wing scale development and cell shape in <i>Bicyclus anynana</i> butterflies" @default.
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- W3204989907 doi "https://doi.org/10.1101/2021.10.19.464939" @default.
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