REGIONAL DISTRIBUTION OF [H-3] 2-DEOXYGLU COSE UPTAKE IN THE WORKER HONEYBEE ANTENNAL LOBE

The study of the regional distribution of [H-3] 2-deoxyglucose uptake in response to an odour stimulation, or to an odourless air flow, has allowed the determination of a global scheme of differential quantitat ive incorporation in four compartments of the antennal lobe. Three of them can be ranked in decreasing order of quantity of radioactivity up take : the peripheral region of the lobe which is always the highest l abelled area, the external part of the coarse neuropile and the glomer uli, mainly their cortical Layer. The fourth compartment including the inter-glomerular spaces and the outer margins of the glomeruli exhibi ts a variable labelling, always higher than inside the glomeruli. The location of the labelling in the glial cells and/or in the neurons is discussed in the general context of odour processing.