Testosterone activates sexual dimorphism including male-typical carotenoid but not melanin plumage pigmentation in a female bird
Testosterone activates sexual dimorphism including male-typical carotenoid but not melanin plumage pigmentation in a female bird
复制标题
睾酮激活性别二态性，包括雄性典型的类胡萝卜素，但不激活雌鸟的黑色素羽毛色素沉着
DOI：
10.1242/jeb.135384
复制
发表时间：
2016
影响因子：
2.8
通讯作者：
H. Schwabl
中科院分区：
文献类型：
--
作者：
W. Lindsay;D. G. Barron;M. Webster;H. Schwabl
摘要 在雄性中，通常是睾酮 (T) 激活性选择形态和行为表现的表达，但 T 在调节雌性中类似性状中的作用尚不清楚。在这里，我们将相关数据与两性 T 和促性腺激素释放激素 (GnRH) 操作的结果相结合，以评估 T 在介导红背细尾鹪鹩 (Malurus melanocephalus) 两性二态性颜色和形态中的作用。我们发现：（1）雌性装饰性状（喙颜色变深和背部羽毛呈红色）的自然变异与年龄和循环雄激素滴度呈正相关，（2）雌性有能力响应外源T表达大多数雄性典型特征，包括类胡萝卜素色素的身体羽毛、较短的羽毛、颜色变深的喙和增大的泄殖腔隆起，但是（3）雄性典型特征的产生似乎受到限制黑色素的羽毛，以及（4）婚前蜕皮期间雄激素水平低，可能是因为卵巢产生类固醇的能力低（或黄体生成素敏感性），阻止雌性发育出类似雄性的装饰。因此，雌性似乎保留了激素调节的雄性典型装饰的分子机制，尽管这些机制由于激素信号产生不足而很少被激活。重点文章：雌性红背细尾鹩莺对外源性和内源性睾酮做出反应，表现出雄性典型特征，包括类胡萝卜素色素的羽毛、变黑的喙和增大的精子储存器官，但在产生黑色素色素的羽毛方面受到限制。
ABSTRACT In males it is frequently testosterone (T) that activates the expression of sexually selected morphological and behavioral displays, but the role of T in regulating similar traits in females is less clear. Here, we combine correlational data with results from T and gonadotropin-releasing hormone (GnRH) manipulations in both sexes to assess the role of T in mediating sexually dimorphic coloration and morphology in the red-backed fairy-wren (Malurus melanocephalus). We show that: (1) natural variation in female expression of ornamental traits (darkened bills and red back feathers) is positively associated with age and circulating androgen titres, (2) females have the capacity to express most male-typical traits in response to exogenous T, including carotenoid-pigmented body plumage, shorter feathers, darkened bill and enlarged cloacal protuberance, but (3) appear constrained in production of male-typical melanin-pigmented plumage, and (4) low androgen levels during the pre-nuptial molt, probably because of low ovarian capacity for steroid production (or luteinizing hormone sensitivity), prevent females from developing male-like ornamentation. Thus, females appear to retain molecular mechanisms for hormonally regulated male-typical ornamentation, although these are rarely activated because of insufficient production of the hormonal signal. Highlighted Article: Female red-backed fairy-wrens express male-typical traits in response to exogenous and endogenous testosterone, including carotenoid-pigmented plumage, darkened bill and an enlarged sperm storage organ, but are constrained in production of melanin-pigmented plumage.
HPG 轴反应性的变异来源和雌性鸣禽性类固醇的个体一致升高。
影响因子：
2.7
作者：
Rosvall,KimberlyA;BergeonBurns,ChristineM;Hahn,ThomasP;Ketterson,EllenD
通讯作者：
Ketterson,EllenD
DOI：
10.1098/rstb.2013.0083
发表时间：
2013-12
期刊：
Philosophical Transactions of the Royal Society B: Biological Sciences
影响因子：
--
作者：
K. Rosvall
通讯作者：
K. Rosvall