Spatial distribution of opsin-encoding mRNAs in the tiered larval retinas of the sunburst diving beetle Thermonectus marmoratus (Coleoptera: Dytiscidae).

The Journal of Experimental Biology
Srdjan MaksimovicElke K Buschbeck

Abstract

Larvae of the sunburst diving beetle, Thermonectus marmoratus, have a cluster of six stemmata (E1-6) and one eye patch on each side of the head. Each eye has two retinas: a distal retina that is closer to the lens, and a proximal retina that lies directly underneath. The distal retinas of E1 and E2 are made of a dorsal and a ventral stack of at least twelve photoreceptor layers. Could this arrangement be used to compensate for lens chromatic aberration, with shorter wavelengths detected by the distal layers and longer wavelengths by the proximal layers? To answer this question we molecularly identified opsins and their expression patterns in these eyes. We found three opsin-encoding genes. The distal retinas of all six eyes express long-wavelength opsin (TmLW) mRNA, whereas the proximal retinas express ultraviolet opsin (TmUV I) mRNA. In the proximal retinas of E1 and E2, the TmUV I mRNA is expressed only in the dorsal stack. A second ultraviolet opsin mRNA (TmUV II), is expressed in the proximal retinas of E1 and E2 (both stacks). The finding that longer-wavelength opsins are expressed distally to shorter-wavelength opsins makes it unlikely that this retinal arrangement is used to compensate for lens chromatic aberration. In a...Continue Reading

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Citations

Sep 28, 2014·Journal of Comparative Physiology. A, Neuroethology, Sensory, Neural, and Behavioral Physiology·Annette Stowasser, Elke K Buschbeck
Sep 12, 2015·Journal of Comparative Physiology. A, Neuroethology, Sensory, Neural, and Behavioral Physiology·Shannon Werner, Elke K Buschbeck
Aug 10, 2010·Current Biology : CB·Annette StowasserElke K Buschbeck
Jun 13, 2015·Royal Society Open Science·Simon M TierneyAndrew D Austin
Oct 11, 2017·Integrative and Comparative Biology·Aaron L StahlElke K Buschbeck
Dec 16, 2016·The Journal of Experimental Biology·Marisano JamesElke K Buschbeck
Sep 23, 2016·The Journal of Experimental Biology·Thomas W Cronin, Michael J Bok
Oct 3, 2020·Development Genes and Evolution·Meng WuMarkus Friedrich
Oct 14, 2011·The Journal of Experimental Biology·Srdjan MaksimovicElke K Buschbeck
Nov 30, 2010·The Journal of Experimental Biology·Premraj RajkumarJohn E Layne
Jan 31, 2014·The Journal of Experimental Biology·Kevin BlandElke K Buschbeck

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