The neural substrate of spectral preference in Drosophila

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2008
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Gao, Shuying
Takemura, Shin-ya
Ting, Chun-Yuan
Huang, Songling
Lu, Zhiyuan
Luan, Haojiang
Rister, Jens
Yang, Meiluen
Hong, Sung-Tae
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Neuron. 2008, 60(2), pp. 328-342. ISSN 0896-6273. eISSN 1097-4199. Available under: doi: 10.1016/j.neuron.2008.08.010
Zusammenfassung

Drosophila vision is mediated by inputs from three types of photoreceptor neurons; R1–R6 mediate achromatic motion detection, while R7 and R8 constitute two chromatic channels. Neural circuits for processing chromatic information are not known. Here, we identified the first-order interneurons downstream of the chromatic channels. Serial EM revealed that small-field projection neurons Tm5 and Tm9 receive direct synaptic input from R7 and R8, respectively, and indirect input from R1–R6, qualifying them to function as color-opponent neurons. Wide-field Dm8 amacrine neurons receive input from 13–16 UV-sensing R7s and provide output to projection neurons. Using a combinatorial expression system to manipulate activity in different neuron subtypes, we determined that Dm8 neurons are necessary and sufficient for flies to exhibit phototaxis toward ultraviolet instead of green light. We propose that Dm8 sacrifices spatial resolution for sensitivity by relaying signals from multiple R7s to projection neurons, which then provide output to higher visual centers.

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570 Biowissenschaften, Biologie
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MOLNEURO, SYSNEURO
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ISO 690GAO, Shuying, Shin-ya TAKEMURA, Chun-Yuan TING, Songling HUANG, Zhiyuan LU, Haojiang LUAN, Jens RISTER, Andreas THUM, Meiluen YANG, Sung-Tae HONG, Jing W. WANG, Ward F. ODENWALD, Benjamin H. WHITE, Ian A. MEINERTZHAGEN, Chi-Hon LEE, 2008. The neural substrate of spectral preference in Drosophila. In: Neuron. 2008, 60(2), pp. 328-342. ISSN 0896-6273. eISSN 1097-4199. Available under: doi: 10.1016/j.neuron.2008.08.010
BibTex
@article{Gao2008-10-23neura-17153,
  year={2008},
  doi={10.1016/j.neuron.2008.08.010},
  title={The neural substrate of spectral preference in Drosophila},
  number={2},
  volume={60},
  issn={0896-6273},
  journal={Neuron},
  pages={328--342},
  author={Gao, Shuying and Takemura, Shin-ya and Ting, Chun-Yuan and Huang, Songling and Lu, Zhiyuan and Luan, Haojiang and Rister, Jens and Thum, Andreas and Yang, Meiluen and Hong, Sung-Tae and Wang, Jing W. and Odenwald, Ward F. and White, Benjamin H. and Meinertzhagen, Ian A. and Lee, Chi-Hon}
}
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