Unconventional ultraviolet sensitivity spectra of Ascalaphus (Insecta,Neuroptera) |
| |
Authors: | F Gribakin E Alekseyev S Shukolyukov M Gogala |
| |
Affiliation: | (1) Russian Academy of Sciences, Sechenov Institute of Evolutionary Physiology and Biochemistry, M. Thorez prospect, 44, 194223 St. Petersburg, Russia;(2) Slovene Museum of Natural History, Lubljana, Slovenia |
| |
Abstract: | The spectral sensitivity of 21 eye preparations of Ascalaphus (Libelluloides) macaronius (Insecta, Neuroptera) has been re-measured using an up-to-date spectral scan method. 1. Dorso-frontal and ventro-lateral eyes have different spectral characteristics with peaks of sensitivity at 329 ± 8 nm (n = 15) and 343 ± 4 nm (n = 5) (P = 0.002), respectively. 2. The absorbance of the visual pigment layer, K, determined from the shape of the spectral sensitivity curves is 1.3 ± 1.8(n = 15) for dorso-frontal eyes and – 1.0 ± 0.3(n = 5) for ventrolateral eyes, thus implying higher selfscreening in the dorso-frontal eyes and narrowing of the spectral sensitivity curves as regards to a template visual pigment in ventro-lateral eyes. 3. Plotting K versus spectral sensitivity peak wavelength max revealed an inverse correlation between these variables with K = 42.5 – 0.126 max at r = 0.88(n = 19). 4. Extracts of ommochromes and carotenoids (Figs. 4 to 6) do not allow to account for the above diversity of optical properties of the Ascalaphus eye (Fig. 7).Abbreviations
SSC
spectral sensitivity curve
-
DF
dorso-frontal eye
-
UV
ultraviolet
-
VL
ventro-lateral eye |
| |
Keywords: | UV visual pigment Spectral sensitivity Compound eye Insects |
本文献已被 SpringerLink 等数据库收录! |
|