相关实验视频

Updated: Jan 9, 2026

Electrophysiological Method for Recording Intracellular Voltage Responses of Drosophila Photoreceptors and Interneurons to Light Stimuli In Vivo

Electrophysiological Method for Recording Intracellular Voltage Responses of Drosophila Photoreceptors and Interneurons to Light Stimuli In Vivo

Published on: June 19, 2016

微观结构和转录学揭示了非强制性洞穴居民Oreolalax rhodostigmatus (Megophryidae,Anura) 的快速光诱导的视觉可塑性

Xiuhui Ma^1,2, Xue Zhong^1,2, Tianyang Zhang^1,2

¹School of Animal Science, Guizhou University, Guiyang, Guizhou Province, 550025, China.

|December 6, 2025

概括

头 (Oreolalax rhodostigmatus) 呈现出了显著的适应性视觉可塑性. 长时间暴露于光线会触发视网膜重塑,并调高关键光传导基因,使视力恢复.

科学领域:

进化生物学是进化的生物学.
发育生物学是发展生物学.
感官生物学感官生物学

背景情况:

现型可塑性允许生物适应环境变化.
居住在洞穴中的物种经常表现出视觉退化,但一些非强制性物种可能保持可塑性.
研究了Oreolalax rhodostigmatus幼,以了解视觉可塑性对光的反应.

研究的目的:

为了研究Oreolalax rhodostigmatus幼长时间暴露于光线的形态学,组织学和分子反应.
为了测试视网膜结构重塑和光传导基因上调的假设.
为了确定适应性可塑性是否可逆在这种物种中.

主要方法:

头视网膜的组织学和免疫组织化学分析.
转录形状分析以识别差异表达的基因.
光受体形态和线粒体密度的超结构分析.

主要成果:

暴露在光线下的头显示出加厚的视网膜层和精细的光感受器外部段.
关键的光传导基因被显著上调,而一个洞穴适应基因 (s26) 被下调.
在暴露于光线后,观察到线粒体密度增加和光受体结构改善.

结论:

长时间暴露于光线会导致Oreolalax rhodostigmatus的视觉系统中的可逆结构和分子适应.
这些发现表明,视力恢复的潜在途径被保留了下来,与有义务的洞穴鱼不可逆转的退化不同.
这种适应性可塑性代表了一种平衡节能和功能视觉的策略,以响应环境光线线.

关键词:

俄雷奥拉拉克斯 (Oreolalax rhodostigmatus) 是一种的动物.适应性进化是一种适应性进化.遗传基础遗传基础塑性是一种可塑性.视网膜退化视网膜退化视觉器官视觉器官视觉器官

更多相关视频

Desensitization and Recovery of Crayfish Photoreceptors Upon Delivery of a Light Stimulus

Desensitization and Recovery of Crayfish Photoreceptors Upon Delivery of a Light Stimulus

Published on: November 9, 2019

Electrophysiological Methods for Measuring Photopigment Levels in Drosophila Photoreceptors

Electrophysiological Methods for Measuring Photopigment Levels in Drosophila Photoreceptors

Published on: June 2, 2022

相关概念视频

Channel Rhodopsins

Channel Rhodopsins

Most organisms use photoreceptors to sense and respond to light. Examples of photoreceptors include bacteriorhodopsins and bacteriophytochromes in some bacteria, phytochromes in plants, and rhodopsins in the photoreceptor cells of the vertebral retina. The light-sensitive property of these receptors is because of the bound chromophores, such as bilin in the phytochromes and retinal in the rhodopsins.
Rhodopsins belong to the family of cell surface proteins called G-protein coupled receptors,...

Photoreceptors and Visual Pathways

Photoreceptors and Visual Pathways

At the molecular level, visual signals trigger transformations in photopigment molecules, resulting in changes in the photoreceptor cell's membrane potential. The photon's energy level is denoted by its wavelength, with each specific wavelength of visible light associated with a distinct color. The spectral range of visible light, classified as electromagnetic radiation, spans from 380 to 720 nm. Electromagnetic radiation wavelengths exceeding 720 nm fall under the infrared category,...