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. 2023 Mar 8;13:3851. doi: 10.1038/s41598-023-30796-5

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© The Author(s) 2023

Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/.

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Olfactory receptor neuron responses. ( a) Example of EAG responses curves from a single bee to all the odours and combinations. The black line below the recording indicates the stimulus presence (2 s). (b) Mean of the normalized response amplitude (± SEM) to different concentrations of geosmin. (c) Mean of the normalized response amplitude (± SEM) to different concentrations of geosmin combined with IAA 10^–3. (d) Mean of the normalized response amplitude (± SEM) to different concentrations of geosmin combined with IAA 10^–1. IAA 10^-x: Isoamyl acetate 10^-x (vol/vol); Geo 10^-x: Geosmin 10^-x (vol/vol); Statistics are from a Friedman test followed by Dunn’s multiple comparisons with Control, IAA3, and IAA1, in B, C, D respectively: ****p < 0.0001; ***p < 0.001; **p < 0.01; *p < 0.05. Individual amplitude responses from all the tested bees (n = 24) are represented in Supplementary Fig. 1.