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NUITFRANCE - Bibliothèque - Fiche bibliographique
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Document " Spectral sensitivity of photoreceptors in insect compound eyes: Comparison of species and methods "
Type de document : |
Articles de revue scientifique |
Thème du document : |
Nuit naturelle - Sens et orientation du vivant |
Groupe biologique : |
Invertébrés terrestres |
Auteur(s) : |
MENZEL R. VENTURA D.F. HERTEL H. DE SOUZA J.M. GREGGERS U.
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Date de publication : |
Mars 1986 |
Langue : |
English/Anglais |
Nom du périodique : |
Journal of Comparative Physiology A |
Précisions : |
Volume 158. Numéro 2. Pages 165-177 |
Lien contenu/source : |
https://link.springer.com/article/10.1007%2FBF0133... |
DOI : |
10.1007/BF01338560 |
Citation courte : |
Menzel et al. (1986) |
Citation complète (format NuitFrance) : |
MENZEL R., VENTURA D.F., HERTEL H., DE SOUZA J.M. & GREGGERS U. (1986). Spectral sensitivity of photoreceptors in insect compound eyes: Comparison of species and methods. Journal of Comparative Physiology A. Volume 158. Numéro 2. Pages 165-177. |
Résumé du document : |
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Three different methods were used to determine the spectral sensitivity of retinula cells in the compound eyes of three species of hymenopteran insects (Apis mellifera, Melipona quadrifasciata, Osmia rufa). The conventional flash method gives the least reliable results. Sensitivity is extremely sensitive to small fluctuations of the resting potential and long lasting changes induced by preceding test flashes. The ramp method, which speeds up a spectral scan to about 1 min and keeps effective illumination constant at every flash, determines S(?) much more reliably. The best results are obtained with the spectral scan method, which provides the experimenter with aS(?) function of high spectral resolution within 20 s. Using this method we demonstrate that the high observed variability inS(?) of individual receptors is the result of the inadequacy of the flash method, which was the only method used in earlier studies.
Double microelectrode experiments and variations of the stimulus conditions reveal that field potentials and return flow of electric current produced by activated neighboring cells have no effect in the bee eye. We conclude that the model of Shaw (1975, 1981) of current flow in the locust and fly eye does not apply to the bee eye. Very rare recordings (about 1%) of UV receptors with hyperpolarizing responses to long wavelength light are interpreted as having a synaptic inhibitory connection to green receptors.
The improvement of spectral measurements of single receptors allows us for the first time to model the spectral input to a color-coding network with great precision.
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Saisie sur NuitFrance par : |
Rosor |
Saisie sur NuitFrance en : |
Octobre 2017 |
Identifiant NuitFrance : |
NF-BIBLI-1743 |
Permalien de la fiche NuitFrance : |
http://www.nuitfrance.fr/?page=donneesdoc&partie=fiche-bibliographique&id_doc=1743 |
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