VISUAL PIGMENTS, OIL DROPLETS AND SPECTRAL SENSITIVITY OF PIGEON
VISUAL PIGMENTS, OIL DROPLETS AND SPECTRAL SENSITIVITY OF PIGEON
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DOI：
10.1016/0042-6989(77)90147-x
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发表时间：
1977-01-01
期刊：
影响因子：
1.8
通讯作者：
BOWMAKER, JK
中科院分区：
文献类型：
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作者：
BOWMAKER, JK
用显微分光光度计测定了信鸽（Columba livia）感受器中的油滴和视色素，结果表明信鸽感受器中至少存在5种油滴和4种视色素。油滴起到了截止滤光片的作用，其50%透射的波长取决于它们来自视网膜的哪个区域，但位于600和610，560和570，470和554，470和476以及低于430 nm之间，并有效地切断了低于这些波长的光。视杆受体含有λ max [最大吸收波长]为503 nm的视紫红质。主导视锥视色素具有λ max 567 nm，并且在双视锥的两个成员和3种类型的单视锥中发现。另外两种类型的单视锥含有绿色吸收颜料（λ max约515 nm），另一种类型的单视锥含有蓝色吸收颜料（λ max约460 nm）。从油滴的透射特性和视锥细胞视色素的吸收光谱，每个锥细胞类型的有效光谱灵敏度的推导和直接相关的视网膜和视顶盖中的孤立单位的光谱灵敏度和整体的明视灵敏度的鸽子作为测量行为和电生理。
Microspectrophotometer measurements of the oil droplets and visual pigments in the receptors of the pigeon [Columba livia] demonstrated the presence of at least 5 types of oil droplet and 4 visual pigments. The oil droplets acted as cut-off filters, their wavelengths of 50% transmission varying depending from which area of the retina they came, but lying between 600 and 610, 560 and 570, 470 and 554, 470 and 476 and below 430 nm, and effectively cutting off light below these wavelengths. The rod receptors contained a rhodopsin with .lambda.max [wavelength of maximum absorption] 503 nm. The dominant cone visual pigment had .lambda.max 567 nm and was found in both members of the double cone and 3 types of single cones. Two further types of single cone contain a green-absorbing pigment (.lambda.max about 515 nm) and another type of single cone a blue-absorbing pigment (.lambda.max about 460 nm). From the transmission characteristics of the oil droplets and the absorbance spectra of the cone visual pigments, the effective spectral sensitivities of each cone type was derived and directly related to the spectral sensitivities of isolated units in the retina and optic tectum and to the overall photopic sensitivity of the pigeon as measured behaviorally and electrophysiologically.