VISUAL LEARNING IN A PHOTORECEPTOR DEGENERATION MUTANT OF DROSOPHILA-MELANOGASTER
VISUAL LEARNING IN A PHOTORECEPTOR DEGENERATION MUTANT OF DROSOPHILA-MELANOGASTER
复制标题
DOI：
10.1007/bf00611923
复制
发表时间：
1978-01-01
期刊：
影响因子：
--
通讯作者：
REICHERT, H
中科院分区：
文献类型：
--
作者：
BICKER, G;REICHERT, H
人口D。黑腹果蝇野生型（菌株CS）和具有功能失活的小网膜细胞R1-6的光感受器突变体rdgB可以被调节以避免不同强度的406 nm光，其已经与厌恶刺激（摇动）配对。一般视觉学习能力不受rdgB突变的影响，这意味着可调节的强度辨别可以由视网膜受体R7和R8介导。尽管rdgB突变体在低于0.015W的强度阈值时没有显示出可调节的强度区分。m-2时，野生型和突变体都可以被调节为在较高强度下辨别小至0.5 log单位的强度差异。实验中，2个光谱不同的刺激（399 nm和512 nm）empolyed，显示条件作用的rdgB突变体和野生型依赖于给定的组合强度值。这些实验符合野生型区分波长和强度的预期。对于rdgB苍蝇来说，没有发现存在颜色歧视的积极证据。
Populations of D. melanogaster wildtype (strain CS) and of the photoreceptor mutant rdgB with functionally inactivated retinula cells R1-6 could be conditioned to avoid different intensities of a 406 nm light, which had been paired with aversive stimulation (shaking). General visual learning ability is not impaired by the rdgB mutation implying that conditionable intensity discrimination can be mediated by retinal receptors R7 and R8. Although the rdgB mutant shows no conditionable intensity discrimination below an intensity threshold of 0.015 W .cntdot. m-2, both the wildtype and the mutant could be conditioned to discriminate intensity differences as small as 0.5 log units at higher intensities. Experiments in which 2 spectrally different stimuli (399 nm and 512 nm) are empolyed, show that conditioning effects for the rdgB mutant and for the wildtype are dependent on the given combinations of intensity values. These experiments are in accordance with the expectation that the wildtype discriminates wavelengths and intensities. For rdgB flies no positive evidence for the existence of color discrimination could be found.