Ancestral photoreceptor diversity as the basis of visual behaviour
Ancestral photoreceptor diversity as the basis of visual behaviour
复制标题
DOI：
10.1038/s41559-023-02291-7
复制
发表时间：
2024-01-22
影响因子：
16.8
通讯作者：
Baden，Tom
中科院分区：
文献类型：
--
作者：
Baden，Tom
动物的色觉是基于比较来自不同光感受器的信号。一般认为，处理不同光谱类型的感光器主要用于色觉。在这里，我建议，而不是光感受器是平行的功能通道，差异支持视觉运动程序，如运动视觉行为，猎物捕获和捕食者逃避。颜色视觉可能是这些回路的第二个好处，最初帮助水生脊椎动物视觉导航和分割水下世界。具体来说，我认为祖先脊椎动物的视觉是围绕三个主要系统建立的，包括基于祖先红锥和杆的高分辨率通用灰度系统，以调节视觉身体稳定和导航，基于祖先紫外线锥的高灵敏度专业前景系统，以调节威胁检测和猎物捕获，以及一个基于祖先绿色和蓝色视锥细胞的网络抑制系统，用于调节红色/视杆细胞和紫外线回路。这种祖先的策略可能仍然支撑着今天的视觉，不同的脊椎动物谱系已经调整了它们原来的感光器电路以适应它们不同的视觉生态。
Animal colour vision is based on comparing signals from different photoreceptors. It is generally assumed that processing different spectral types of photoreceptor mainly serves colour vision. Here I propose instead that photoreceptors are parallel feature channels that differentially support visual-motor programmes like motion vision behaviours, prey capture and predator evasion. Colour vision may have emerged as a secondary benefit of these circuits, which originally helped aquatic vertebrates to visually navigate and segment their underwater world. Specifically, I suggest that ancestral vertebrate vision was built around three main systems, including a high-resolution general purpose greyscale system based on ancestral red cones and rods to mediate visual body stabilization and navigation, a high-sensitivity specialized foreground system based on ancestral ultraviolet cones to mediate threat detection and prey capture, and a net-suppressive system based on ancestral green and blue cones for regulating red/rod and ultraviolet circuits. This ancestral strategy probably still underpins vision today, and different vertebrate lineages have since adapted their original photoreceptor circuits to suit their diverse visual ecologies.