昼夜节律的分子基础是白天和夜晚的白斑之间差异
Guiyun Li1, Qian Cui1,2, Shirui Zheng3
1Key Laboratory of Plant Design, CAS Center for Excellence in Molecular Plant Sciences, Chinese Academy of Sciences, Shanghai, China.
iScience
|April 11, 2025
概括
这项研究揭示了Lepidoptera的核心节奏基因,其中关键的代谢基因转移解释了夜间和白天的昆虫行为. 它突出了夜生活物种光传导的昼夜控制的光敏感性.
科学领域:
- 分子生物学分子生物学
- 时间生物学 时间生物学
- 昆虫生态学 昆虫生态学
背景情况:
- 了解夜间和昼间行为的分子基础对于理解昆虫的适应性专业化至关重要.
- 黑色切割虫 (Agrotis ipsilon,BCW) 作为一种模型生物来研究夜生活物种中节律性基因表达.
研究的目的:
- 识别和比较夜间昆虫 (BCW) 和白天昆虫 (君主蝶) 的节奏基因库.
- 阐明昼夜昆虫之间行为模式的分歧的分子基础.
主要方法:
- 产生和分析黑色切割虫 (Agrotis ipsilon) 的每日转录组.
- 黑色虫和君主蝶 (Danaus plexippus) 之间的比较转录基因分析.
- 检查基因表达模式,专注于与代谢相关的和光传导基因.
主要成果:
- 蝶和君主蝶都共享了一组保存的节奏表达基因,这表明蝶中基本的计时机制.
- 在BCW和君主蝶之间观察到与代谢相关的基因的显著相位转移,与它们独特的行为模式相关.
- 在BCW中,光传导基因主要由光敏感性来调节,而不是昼夜控制,与君主蝶的边缘节律性形成鲜明对比.
结论:
- 这项研究为行为特征的演变提供了分子洞察力,区分了夜间和白天的昆虫.
- 代谢基因调节在白天和夜间昆虫行为的分歧中发挥着关键作用.
- 光敏感性,而不是昼夜调节,控制着像黑色虫这样的夜生活昆虫的光传导.
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