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Opsins and cell fatein the DrosophilaBolwig organ: trickylessons in homologyinference Markus Friedrich2008 год

Opsins and cell fate in the Drosophila Bolwig organ: tricky lessons in homology inference
review

Страница публикацииПубликация в OpenAlex
Аннотация: Abstract The Drosophila Bolwig organs are small photoreceptor bundles that facilitate the phototactic behavior of the larva. Comparative literature suggests that these highly reduced visual organs share evolutionary ancestry with the adult compound eye. A recent molecular genetic study produced the first detailed account of the mechanisms controlling differential opsin expression and photoreceptor subtype determination in these enigmatic eyes of the Drosophila larva. Here, the evolutionary implications are examined, taking into account the dynamic diversification of opsin genes and the spatial regulation of opsin homolog expression in other insects. It is concluded that, consistent with their common evolutionary roots, the Drosophila larval and adult eyes use the same mechanisms for the regulation of opsin expression and photoreceptor cell fate specification. Strikingly, the structurally highly derived Bolwig organs retained a more ancestral state of opsin expression and regulation. Inconspicuous in size, the Drosophila larval eyes deliver useful lessons in the reconstruction of homology between neuronal cell types with gene expression data, and on the conservative nature of gene regulatory network evolution during the emergence of novel organs from ancestral templates. BioEssays 30:980–993, 2008. © 2008 Wiley Periodicals, Inc.
Год издания: 2008
Авторы: Markus Friedrich
Издательство: Wiley
Источник: BioEssays
Ключевые слова: Neurobiology and Insect Physiology Research, Insect and Arachnid Ecology and Behavior, Circadian rhythm and melatonin
Другие ссылки: BioEssays (HTML)
PubMed (HTML)