Wavelength-dependent effects of light on magnetic compass orientation in Drosophila melanogaster
- 276 Downloads
Wildtype Oregon-R Drosophila melanogaster were trained in the ambient magnetic field to a horizontal gradient of 365 nm light emanating from one of the 4 cardinal compass directions and were subsequently tested in a visually-symmetrical, radial 8-arm maze in which the magnetic field alignment could be varied. When tested under 365 nm light, flies exhibited consistent magnetic compass orientation in the direction from which light had emanated in training.
When the data were analyzed by sex, males exhibited a strong and consistent magnetic compass response while females were randomly oriented with respect to the magnetic field.
When tested under 500 nm light of the same quantal flux, females were again randomly oriented with respect to the magnetic field, while males exhibited a 90° clockwise shift in magnetic compass orientation relative to the trained direction.
This wavelength-dependent shift in the direction of magnetic compass orientation suggests that Drosophila may utilize a light-dependent magnetic compass similar to that demonstrated previously in an amphibian. However, the data do not exclude the alternative hypothesis that a change in the wavelength of light has a non-specific effect on the flies' behavior, i.e., causing the flies to exhibit a different form of magnetic orientation behavior.
Key wordsDrosophila Photoreception Magnetoreception Magnetic compass orientation Geomagnetic field
Unable to display preview. Download preview PDF.
- Arendse MC (1978) Magnetic field detection is distinct from light detection in the invertebrates Tenebrio and Talitrus. Nature 274:358–362Google Scholar
- Arendse MC, Vrins JCM (1975) Magnetic orientation and its relation to photic orientation in Tenebrio molitor L. (Coleoptera, Tenebrionidae). Netherlands J Zool 25(4): 407–437Google Scholar
- Batschelet E (1981) Circular statistics in biology. Academic Press, London New YorkGoogle Scholar
- Feiler R, Harris WA, Kirschfeld K, Wehrhahn C, Zuker CS (1988) Targeted misexpression of a Drosophila opsin gene leads to altered visual function. Nature 333:737–741Google Scholar
- Feiler R, Bjornson R, Kirschfeld K, Mismer D, Rubin GM, Smith DP, Socolich M, Zuker CS (submitted) Ectopic expression of ultraviolet-rhodopsins in the blue photoreceptor cells of Drosophila: visual physiology and photochemistry of transgenic animals. J NeurosciGoogle Scholar
- Harris WA, Stark WS, Walker JA (1976) Genetic dissection of the photoreceptor system in the compound eye of Drosophila melanogaster. J Physiol (Lond) 256:414–439Google Scholar
- Kirschfeld K, Franceschini N, Minke B (1977) Evidence for a sensitizing pigment in fly photoreceptors. Nature 269:386–390Google Scholar
- Kirschfeld K, Feiler R, Hardie R, Vogt D, Franceschini N (1983) The sensitizing pigment in fly photoreceptors. Properties and candidates. Biophys Struct Mech 10:81–92Google Scholar
- Kirschfeld K, Hardie R, Lenz G, Vogt K (1988a) The pigment system of the photoreceptor 7 yellow in the fly, a complex photoreceptor. J Comp Physiol A 162:421–433Google Scholar
- Kirschfeld K, Feiler R, Vogt K (1988b) Evidence for a sensitizing pigment in the ocellar photoreceptors of the fly (Musca, Calliphora). J Comp Physiol A 163:421–423Google Scholar
- Kirschvink JL, Jones DS, MacFadden BJ (1985) Magnetite biomineralization and magnetoreception in organisms: a new biomagnetism. Plenum Press, New YorkGoogle Scholar
- Leask MJM (1977) A physicochemical mechanism for magnetic field detection by migrating birds and homing pigeons. Nature 267:144–145Google Scholar
- Merritt R, Prucell C, Stroink G (1983) Uniform magnetic field produced by three, four, and five square coils. Rev Sci Instrum 54:879–882Google Scholar
- Olcese J, Reuss S, Semm P (1988) Geomagnetic field detection in rodents. Life Sci 42:605–613Google Scholar
- Phillips JB (1986) Two magnetoreception pathways in a migratory salamander. Science 233:765–767Google Scholar
- Phillips JB (1986) Magnetic compass orientation in the Eastern red-spotted newt (Notophthalmus viridescens). J Comp Physiol A 158:103–109Google Scholar
- Phillips JB (1987) Specialized visual receptors respond to magnetic field alignment in the blowfly (Calliphora vicina). Soc Neurosci Abstr 13:397Google Scholar
- Phillips JB, Borland SC (1992) Behavioral evidence for the use of a light-dependent magnetoreception mechanism by a vertebrate. Nature 359:142–144Google Scholar
- Schulten K (1982) Magnetic field effects in chemistry and biology. Adv Solid State Phys 22:61–83Google Scholar
- Semm P, Demaine C (1986) Neurophysiological properties of magnetic cells in the pigeon's visual system. J Comp Physiol A 159:619–625Google Scholar
- Semm P, Nohr D, Demaine C, Wiltschko W (1984) Neural basis of the magnetic compass: Interactions of visual, magnetic and vestibular inputs in the pigeon's brain. J Comp Physiol A 155:283–288Google Scholar
- Stark WS (1977) Sensitivity and adaption in R7, an ultraviolet photoreceptor in the Drosophila retina. J Comp Physiol 115:47–59Google Scholar
- Wiltschko W, Wiltschko R (1972) Magnetic compass of European robins. Science 176:62–64Google Scholar
- Zuker CS, Mismer D, Hardy R, Rubin GM (1988) Ectopic expression of a minor Drosophila opsin in the major photoreceptor cell class: Distinguishing the role of primary receptor and cellular context. Cell 55:475–482Google Scholar