Maxillary palp glomeruli and ipsilateral projections in the antennal lobe of<Emphasis Type="Italic">Drosophila melanogaster</Emphasis> |
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Authors: | Email author" target="_blank">K?P?RajashekharEmail author V?R?Shamprasad |
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Institution: | (1) Department of Applied Zoology, Mangalore University, 574 199 Mangalore, India;(2) Present address: Max-Planck Institute for Neurobiology, Am Klopferspitz 18a, D-82152 Martinsreid, Germany |
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Abstract: | The antennal lobe was examined by Golgi-silver impregnation to differentiate the glomeruli depending on the source and types
of inputs. Thirty-five of the 43 ‘identified’ olfactory glomeruli were Golgi-silver impregnated in the present study. Seven
glomeruli compared to three, reported previously, were found to be targets of maxillary palp chemosensory neurons. These include
glomeruli VA3, VC2, VM5, VA7m/VA7l of the ventral antennal lobe and DC2, DC3, DM5 of the dorsal antennal lobe. The number
of glomeruli receiving the maxillary palp sensory projections tallies with the number ofDrosophila olfactory receptors (seven) reported to be expressed exclusively in the maxillary palp. Twenty-eight Golgi-impregnated glomeruli
were found to receive input from the antennal nerve. The ratio of glomeruli serving the maxillary palp to those serving the
antenna (∼1:5) matches with the ratio ofDrosophila olfactory receptors expressed in these two olfactory organs respectively. In addition to glomerulus V, glomeruli VP1-3, VL1,
VL2a/2p and VC3m/3l were found to receive ipsilateral projections. Thus, additional ipsilateral glomeruli have been identified. |
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Keywords: | Antennal lobe Drosophila glomeruli olfaction |
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