相关实验视频
Updated: Jun 3, 2025

08:34
Automated Charting of the Visual Space of Housefly Compound Eyes
Published on: March 31, 2022
1.8K
深度保护与昆虫眼地面规划中的新性和创新相辅相成
Ke Gao1, Antoine Donati1, Julia Ainsworth1
1Department of Cell & Developmental Biology, School of Biological Sciences, University of California San Diego, La Jolla, CA 92093.
概括
昆虫的复合眼共享了一个保存的发育程序,一个"昆虫眼睛的基本规划",尽管视觉能力不同. 对这个古老蓝图的修改推动了物种间不同眼睛形状和功能的演化.
科学领域:
- 发展生物学 发展生物学
- 进化生物学 进化生物学
- 昆虫学 昆虫学是一门学科.
背景情况:
- 昆虫的复合眼睛在形式和功能上表现出了显著的多样性.
- 不同物种的昆虫眼睛的潜在遗传机制和发育模式在很大程度上是未知的.
研究的目的:
- 为了研究远处的昆虫物种是否使用类似或不同的眼睛模式机制.
- 为了确定导致昆虫眼睛形状和功能多样性的遗传变化.
主要方法:
- 对转录因子表达 (Prospero,Spalt,Defective proventriculus) 的比较分析以确定光受体同质性.
- 在各种昆虫物种 (,蝶,,甲虫) 中进行基因淘汰 (CRISPR/Cas9) 和淘汰 (RNAi) 实验.
- 在视网膜发育过程中检查保存的信号通路 (EGFR,Sevenless).
主要成果:
- 均的发育程序在各种昆虫物种的视网膜上有模式,包括,蚊子,蝶,,甲虫,黄蜂,蜜蜂和.
- 特定的转录因子 (Pros,Sal,Dve) 标志着同类的光受体类型.
- EGFR和Sevenless信号通路对于光受体的招募至关重要,在不同物种的依赖方面存在差异.
- 一个保存的"昆虫眼地面图"存在于早期的ommatidia模式中,在物种特异性修改之前.
结论:
- 昆虫的视网膜发育遵循一个高度保存的类型阶段,这表明了古代的"昆虫眼的地面图".
- 昆虫眼睛的多样化源于对该地面图的修改,包括地面图的修改,非静态模式和专业区域.
- 在建立地面图之后的发展分歧解释了昆虫视觉系统的巨大多样性.
相关概念视频
Anatomy of the Eyeball
5.9K
The eye is a spherical, hollow structure composed of three tissue layers. The outer layer — the fibrous tunic, comprises the sclera — a white structure — and the cornea, which is transparent. The sclera encompasses some of the ocular surface, most of which is not visible. However, the 'white of the eye' is distinctively visible in humans compared to other species. The cornea, a clear covering at the front of the eye, enables light penetration. The eye's middle...
5.9K
Osmoregulation in Insects
16.1K
Malpighian tubules are specialized structures found in the digestive systems of many arthropods, including most insects, that handle excretion and osmoregulation. The tubules are typically arranged in pairs and have a convoluted structure that increases their surface area.
16.1K
Focusing of Light in the Eye
2.5K
Light rays enter the eye through the cornea, a transparent dome-shaped tissue that is the eye's outermost layer. The cornea bends or refracts, light rays traveling to the pupil. The shape of the cornea determines how much of the light is bent and whether the image will be focused correctly on the retina at the back of the eye. Once the light has passed through both refraction layers, it converges into a single focal point onto a small area. This is where photoreceptors start transforming...
2.5K
Vision
52.9K
Vision is the result of light being detected and transduced into neural signals by the retina of the eye. This information is then further analyzed and interpreted by the brain. First, light enters the front of the eye and is focused by the cornea and lens onto the retina—a thin sheet of neural tissue lining the back of the eye. Because of refraction through the convex lens of the eye, images are projected onto the retina upside-down and reversed.
52.9K
Accessory Structures of the Eye
1.5K
Optical perception, or vision, is an extraordinary sense dependent on converting light signals received via the ocular organs. These organs, known as eyes, are securely positioned within the bony cavities of the skull, called orbits. The orbits serve a dual purpose: a protective shield for the ocular globes and a stable attachment point for the soft ocular tissues. The eye's external protective mechanisms include the eyelids, which are edged with lashes that act as a barrier against foreign...
1.5K

