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Light - avoidance - mediating photoreceptors tile the Drosophila larval body wall

机译：避光-介导的感光体平铺果蝇幼虫体壁

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摘要

眼睛外的光感应在很多动物中普遍存在,通常局限于专门的器官.但现在,果蝇幼虫的整个体壁被发现覆盖着能够感应蓝光和紫外线的神经树突,它们是其幼虫的先天避光行为所必需的.这些神经元所用的光传导机制与其他果蝇光受体分子截然不同,但却与在线虫神经元中所发现的一个系统相似.%Photoreceptors for visual perception, phototaxis or light avoidance are typically clustered in eyes or related structures such as the Bolwig organ of Drosophila larvae. Unexpectedly, we found that the class IV dendritic arborization neurons of Drosophila melanogaster larvae respond to ultraviolet, violet and blue light, and are major mediators of light avoidance, particularly at high intensities. These class IV dendritic arborization neurons, which are present in every body segment, have dendrites tiling the larval body wall nearly completely without redundancy. Dendritic illumination activates class IV dendritic arborization neurons. These novel photoreceptors use phototransduction machinery distinct from other photoreceptors in Drosophila and enable larvae to sense light exposure over their entire bodies and move out of danger.
机译：眼睛外的光感应在很多动物中普遍存在,通常局限于专门的器官.但现在,果蝇幼虫的整个体壁被发现覆盖着能够感应蓝光和紫外线的神经树突,它们是其幼虫的先天避光行为所必需的.这些神经元所用的光传导机制与其他果蝇光受体分子截然不同,但却与在线虫神经元中所发现的一个系统相似.%Photoreceptors for visual perception, phototaxis or light avoidance are typically clustered in eyes or related structures such as the Bolwig organ of Drosophila larvae. Unexpectedly, we found that the class IV dendritic arborization neurons of Drosophila melanogaster larvae respond to ultraviolet, violet and blue light, and are major mediators of light avoidance, particularly at high intensities. These class IV dendritic arborization neurons, which are present in every body segment, have dendrites tiling the larval body wall nearly completely without redundancy. Dendritic illumination activates class IV dendritic arborization neurons. These novel photoreceptors use phototransduction machinery distinct from other photoreceptors in Drosophila and enable larvae to sense light exposure over their entire bodies and move out of danger.

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  • 来源
    《Nature》 |2010年第7326期|p.921-926ⅲ|共7页
  • 作者

    Yang Xiang; Quan Yuan; Nina Vogt; Loren L. Looger; Lily Yeh Jan; Yuh Nung Jan;

  • 作者单位

    Howard Hughes Medical Institute, Departments of Physiology, Biochemistry, and Biophysics, University of California San Francisco, San Francisco, California 94158, USA;

    rnHoward Hughes Medical Institute, Departments of Physiology, Biochemistry, and Biophysics, University of California San Francisco, San Francisco, California 94158, USA;

    rnCenterfor Developmental Genetics New York University New York, New York 10003, USA;

    rnHoward Hughes Medical Institute, Janelia Farm Research Campus, Ashburn, Virginia 20147, USA;

    rnHoward Hughes Medical Institute, Departments of Physiology, Biochemistry, and Biophysics, University of California San Francisco, San Francisco, California 94158, USA;

    rnHoward Hughes Medical Institute, Departments of Physiology, Biochemistry, and Biophysics, University of California San Francisco, San Francisco, California 94158, USA;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);美国《化学文摘》(CA);
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