Embryonic developmental process governing the conspicuousness of body stripes and blue tail coloration in the lizard Plestiodon latiscutatus.
Embryonic developmental process governing the conspicuousness of body stripes and blue tail coloration in the lizard Plestiodon latiscutatus.
复制标题
胚胎发育过程控制着蜥蜴 Plestiodon latiscutatus 的明显身体条纹和蓝色尾部着色。
DOI：
10.1111/ede.12214
复制
发表时间：
2017
影响因子：
2.9
通讯作者：
Kuriyama T. and M. Hasegawa
中科院分区：
文献类型：
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作者：
Kuriyama T. and M. Hasegawa
身体条纹和鲜艳的蓝色尾巴颜色的组合在不同的蜥蜴家族中独立进化。要了解如何以及何时蜥蜴开发这种着色，我们显微镜下比较了两个岛屿人口ofPlestiodon latiscutatus，表现出条纹和蓝色的尾巴或不明显的条纹和蓝色尾的青少年，根据新确定的12个正常发育阶段的胚胎，从产卵后不久，就在孵化前的色素细胞的胚胎发育。我们专注于黑色素细胞的作用，在身体条纹和虹膜形态类型的作用，在蓝色尾巴着色的程度。黑色素细胞密度在黑色背景区域的蜥蜴与生动的条纹比蜥蜴与单调的条纹。虹膜细胞开始填充尚未被黑色素细胞占据的真皮空间，这导致条纹中的虹膜细胞密度高于条纹间区域。我们还发现，在第11阶段，在尾部的特定区域出现了具有反射蓝色结构着色的薄血小板的虹膜细胞。出壳后，尾部出现虹膜柄的位置与前棕、绿色尾和后蓝尾的分界区相吻合。
The combination of body stripes and vivid blue tail color has independently evolved in different lizard families. To understand how and when lizards developed this coloration, we microscopically compared the embryonic development of pigment cells in two island populations ofPlestiodon latiscutatusthat exhibit either striped and blue tailed or inconspicuously striped and blue tailed juveniles, based on the newly determined 12 normal developmental stages of embryos from shortly after egg laying to just before hatching. We focus on the role of the melanophores in the body stripe and the role of iridophore morphotypes in the extent of blue tail coloration. The melanophore density in the black background region was higher in lizards with vivid stripes than in lizards with drab stripes. Iridophores started to fill the dermal space that was not yet occupied by melanophores, which resulted in a higher iridophore density in stripes than in the inter‐stripe regions. We also discovered that iridophores with thin platelets reflecting blue structural coloration appeared at a specific region in the tail at stage 11. The position of the tail where iridophores emerged coincided with the boundary area separating anterior brown and green colored tail from posterior blue colored tail after hatching.