Ultrastructural analysis of throat dermal tissue and chromatophore components in the threespine stickleback (Gasterosteus aculeatus).
Ultrastructural analysis of throat dermal tissue and chromatophore components in the threespine stickleback (Gasterosteus aculeatus).
复制标题
三刺刺鱼（Gasterosteus aculeatus）喉咙真皮组织和色素细胞成分的超微结构分析。
作者：
Anderson CM;Fink T;McKinnon JS
棘鱼是研究婚色演化的重要模式动物，但对婚色的组织学分析却非常缺乏。先前对一种婚色性状的分析表明，类胡萝卜素是产生这种颜色的主要色素，即身体沿着呈橙红色。此外，最近的基因表达研究发现，性别之间和种群之间的喉咙颜色的相关性的变化，提高了表面上类似的着色的机制的变化的可能性。我们用透射电子显微镜（TEM），以探讨颜色的组织学相关性在喉真皮组织的threespine刺鱼从北美西部，内和性别之间，人口，和生态型。超微结构分析显示，类胡萝卜素含红细胞是主要的色素细胞成分与橙红色着色在男性和女性的人群。在喉部组织变暗的个体中，没有明显的橙红色，没有检测到红细胞。黑色素细胞的存在是更具体的人口表达，包括作为唯一的色素细胞成分中检测到的人口较暗的鱼。我们在无色的咽喉组织中没有发现皮肤色素细胞单位。这项工作证实了类胡萝卜素和促红细胞在两性间产生橙红色的重要性，以及黑色素细胞内的黑色素在产生深色的着色中的重要性，但没有揭示具有相似着色的人群之间的广泛组织学差异。
The threespine stickleback (Gasterosteus aculeatus) is an important model for studying the evolution of nuptial coloration, but histological analyses of color are largely lacking. Previous analyses of one nuptial coloration trait, orange-red coloration along the body, have indicated carotenoids are the main pigment producing this color. In addition, recent gene expression studies found variation in the correlates of throat coloration between the sexes and between populations, raising the possibility of variation in the mechanisms underlying superficially similar coloration. We used transmission electron microscopy (TEM) to investigate the histological correlates of color in the throat dermal tissue of threespine stickleback from Western North America, within and between sexes, populations, and ecotypes. Ultrastructural analysis revealed carotenoid-containing erythrophores to be the main chromatophore component associated with orange-red coloration in both males and females across populations. In individuals where some darkening of the throat tissue was present, with no obvious orange-red coloration, erythrophores were not detected. Melanophore presence was more population-specific in expression, including being the only chromatophore component detected in a population of darker fish. We found no dermal chromatophore units within colorless throat tissue. This work confirms the importance of carotenoids and the erythrophore in producing orange-red coloration across sexes, as well as melanin within the melanophore in producing darkened coloration, but does not reveal broad histological differences among populations with similar coloration.
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影响因子：
3.5
作者：
Champ CM;Vorobyev M;Marshall NJ
通讯作者：
Marshall NJ
影响因子：
--
作者：
FOX, H;WHITEAR, M
通讯作者：
WHITEAR, M
影响因子：
2.3
作者：
Anderson，Christopher M.;McKinnon，Jeffrey S.
通讯作者：
McKinnon，Jeffrey S.
影响因子：
2.9
作者：
Greenwood AK;Cech JN;Peichel CL
通讯作者：
Peichel CL
影响因子：
7.8
作者：
BAGNARA, JT;TAYLOR, JD;HADLEY, ME
通讯作者：
HADLEY, ME