Figure 2.

Plant odorants inhibit the pheromone-induced activity in the cumulus region of the antennal lobe. Relative fluorescence changes in the cumulus region of the antennal lobe upon stimulation with Z11-16:Ald (10 μg, gray bar), or with the plant odorant indicated [1:10 (v/v) diluted in mineral oil, colored bars] or with a mix of both (striped bars). Data represent the mean response including the standard error of mean (SEM) based on 5–10 H. virescens males. ΔF/F [%] values have been normalized for each individual over all odors and glomeruli by setting the maximum response to 1. All plant odorants except isoamyl acetate significantly reduce the pheromone-induced response in the cumulus (^**p < 0.01; ANOVA followed by Dunnett Multiple Comparisons Test).