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Light-dependent magnetic compass orientation in amphibians and insects: candidate receptors and candidate molecular mechanisms

Författare:
Publiceringsår: 2010
Språk: Engelska
Sidor: S241-S256
Publikation/Tidskrift/Serie: Journal of the Royal Society - Interface
Volym: 7
Dokumenttyp: Artikel
Förlag: Royal Society

Sammanfattning

Magnetic compass orientation by amphibians, and some insects, is mediated by a light-dependent magnetoreception mechanism. Cryptochrome photopigments, best known for their role in circadian rhythms, are proposed to mediate such responses. In this paper, we explore light-dependent properties of magnetic sensing at three levels: (i) behavioural (wavelength-dependent effects of light on magnetic compass orientation), (ii) physiological (photoreceptors/photopigment systems with properties suggesting a role in magnetoreception), and (iii) molecular (cryptochrome-based and non-cryptochrome-based signalling pathways that are compatible with behavioural responses). Our goal is to identify photoreceptors and signalling pathways that are likely to play a specialized role in magnetoreception in order to definitively answer the question of whether the effects of light on magnetic compass orientation are mediated by a light-dependent magnetoreception mechanism, or instead are due to input from a non-light-dependent (e. g. magnetite-based) magnetoreception mechanism that secondarily interacts with other light-dependent processes.

Disputation

Nyckelord

  • Biology and Life Sciences
  • magnetic compass
  • compound eye
  • pineal
  • cryptochrome
  • magnetoreception
  • photoreception

Övriga

Published
Yes
  • ISSN: 1742-5689

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