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锯缘青蟹复眼的单一感受系统

杨雄里, 郑微云, 柴敏娟, 范天行

中国科学院上海生理研究所. 上海；厦门大学海洋系. 福建

摘要

锯缘青蟹视网膜电图的暗视光谱敏感曲线的峰值在500nm 左右,与视紫红(λ_(max)=510nm)的吸收光谱吻合得很好。其波形和振幅-强度曲线与刺激波长无关,均符合单变量原理。在蓝或绿背景光明适应时,长波段的相对光谱敏感性增高。红光明适应未能抑制这种增高,表明它并非是由于对长波敏感的感受系统的存在。在校正了屏蔽色素的选择性吸收特性后,长波段光谱敏感性与暗视时十分接近,提示该现象可能系明适应造成的色素迁移所致。该文结果表明,锯缘青蟹的复眼仅具有单一的感受系统。

关键词： 光谱敏感性; 屏蔽色素; 颜色光适应; 甲壳类复眼

Single receptor system in the compound eye of crabs (Scylla serrata)

Yang Xiongli, Zheng Weiyun, Chai Mingjun, Fan Tienxing

Shanghai Institute of Plysiology, Academia Sinica. Shanghai, China；Department of Oceanography, Amoy University. Fujian, China

Abstract

Scotopic spectral sensitivity curves of the ERG of crabs (Scylla serrata) peaked around 500 nm, and showed a fairly good agreement with the absorption curve of a rhodopsin with #lambda#_(max)=510nm. Both waveform and response amplitude versus intensity relationship of the ERG were independent of the wavelength of stimuli, and hence followed the Univariance Principle. Under conditions of selective chromatic adaptation, relative sensitivity was elevated in the long-wavelength regiom of the spectrum (≧540 nm.). The elevated sensitivity remained even when, the eye was exposed to bright red backgrounds. This fact indicated that the phenomenon was not contributed by another long-wavelength sensitive receptor system. After correcting the effect of selective absorption of screening pigment, relative sensitivity was found to be close to the scotopic one in the long-wavelength region. This suggested that the elevated sensitivity in the long-wavelength region might result from migration of screening pigment during light adaptation. It is therefore concluded that the eye of crabs has only a single type of receptor system.

Key words: Spectral sensitivity;Screening pigment;Chromatic adaptation;Compound eye of crustacean

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引用本文：

杨雄里, 郑微云, 柴敏娟, 范天行. 锯缘青蟹复眼的单一感受系统[J]. 生理学报 1985; 37 (1): .

Yang Xiongli, Zheng Weiyun, Chai Mingjun, Fan Tienxing. Single receptor system in the compound eye of crabs (Scylla serrata). Acta Physiol Sin 1985; 37 (1): (in Chinese with English abstract).