青春期激素是必要的,以配对形象性磁盘形成与昆虫的营养在昆虫
J W Truman1, K Hiruma, J P Allee
1Department of Biology, University of Washington, Seattle, WA 98195-1800, USA. jwt@u.washington.edu
Science (New York, N.Y.)
|June 3, 2006
概括
饥饿的烟草角虫幼虫在没有青春激素的情况下生长成像盘,揭示了其抑制生长的作用. 这一发现对于理解昆虫的发育和变形至关重要.
科学领域:
- 发育生物学是发展生物学.
- 昆虫生理学 昆虫生理学
- 内分泌学 在内分泌学.
背景情况:
- 饥饿的Manduca sexta幼虫中的幼虫和形状组织由于营养缺乏和荷尔蒙调节而停止生长.
- 众所周知,青春激素 (JH) 抑制了昆虫中形状盘的生长和发育.
研究的目的:
- 调查营养依赖信号和青少年激素在饥饿期间调节形状盘生长中的独特作用.
- 为了阐明青年激素抑制形象性盘形态发生的机制,独立于ecdysteroids.
主要方法:
- 在Manduca sexta幼虫的实验性饥饿中.
- 青春激素的应用和去除.
- 在不同的条件下观察和分析影像性圆盘的形成和生长.
主要成果:
- 在饥饿的幼虫中,由于缺乏依赖营养的信号和JH抑制,虚盘无法生长.
- 青春激素的缺失使得即使在严重饥饿的情况下,形象性盘的生长也可能发生.
- 青春期激素被证实可以抑制盘形态发生所需的内在信号,独立于ecdysteroids.
结论:
- 青春激素积极抑制形象性磁盘生长,将内在生长需求与营养可用性分开.
- 在早期形态发生过程中,营养依赖和内在生长信号都对正常成年人体型至关重要.
- 这项研究阐明了昆虫发育和转型中的营养和激素之间的复杂相互作用.
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