Zak P P, Novitskiĭ I Iu, Ostrovskiĭ M A
Zh Evol Biokhim Fiziol. 1981 Sep-Oct;17(5):467-73.
Spectral properties of frog's "red" cones and their mass receptor potential during blue colour adaptation (370--500 nm) have been investigated. The spectral sensitivity maximum depended on the season: in September, frogs had mean lambda max of 572 +/- 4, whereas in December and January-- 553 +/- 4 nm. Low background light resulted in shift of the spectral sensitivity curve to short wavelengths. The background effect did not depend on the wavelength. The shift of spectral sensitivity was accompanied by the increase of LRP to green stimuli and the decrease of LRP to shorter wavelengths. This effect developed not earlier than 5 min after the beginning of light adaptation. The range of the spectral sensitivity maximum shift varied within 575--525 nm, while changes in the amplitude did not exceed 25 nm. The data obtained indicate the shift of spectral sensitivity of "red" cones due to background illumination. This shift is presumably due to ionochromic changes of the visual pigment of the cones. It its turn, chloride redistribution might take place due to light-induced changes in the membrane potential of cells.
研究了青蛙“红色”视锥细胞在蓝色光适应（370 - 500纳米）期间的光谱特性及其群体感受器电位。光谱敏感性最大值取决于季节：9月，青蛙的平均最大波长为572±4纳米，而12月和1月为553±4纳米。低背景光导致光谱敏感性曲线向短波长方向移动。背景效应不依赖于波长。光谱敏感性的移动伴随着对绿色刺激的群体感受器电位增加以及对较短波长的群体感受器电位降低。这种效应在光适应开始后不早于5分钟出现。光谱敏感性最大值移动的范围在575 - 525纳米之间变化，而幅度变化不超过25纳米。所获得的数据表明“红色”视锥细胞的光谱敏感性因背景照明而发生移动。这种移动可能是由于视锥细胞视觉色素的离子变色变化。反过来，由于光诱导的细胞膜电位变化，可能会发生氯离子重新分布。
