Fig. 1: Responses of AmelOR136 and AmelOR109 to pheromonal blends and individual compounds recorded using calcium imaging (ΔF/F0).

A, D Mean response intensity of AmelOR136 (A, n = 27 individuals) and AmelOR109 (D, n = 20 individuals) in response to the presentation of different pheromonal blends: aggregation pheromone (orange), alarm pheromone (green), brood pheromone (blue), queen mandibular pheromone (QMP, brown), queen retinue pheromone (QRP, pink), and waggle dance pheromone (grey) blends. Alarm pheromone (***p < 0.001) and QMP, QRP and aggregation blends significantly activate AmelOR136 in comparison to the air control (*p < 0.01), whereas all blends activate AmelOR109 (***p < 0.001). B, E Time course of odor-evoked responses (average of 27 individuals for AmelOR136 and 20 individuals for AmelOR109) to the presentation of the 6 pheromonal blends (blue bar) for AmelOR136 B and for AmelOR109 E ± SEM. C, F Mean response of AmelOR136 (C, n = 11) and for AmelOR109 (F, n = 20) to the presentation of the individual pheromonal compounds tested at 1000 µg. Only isopentyl acetate (IPA), 9-hydroxy-(E)-2-decenoic acid (9-HDA) and 10-hydroxy-2-decenoic acid (10-HDA) significantly activate AmelOR136 (C, *p < 0.05), whereas AmelOR109 is activated by several odorants (F, *p < 0.05, **p < 0.01, ***p < 0.001).