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. 2022 Sep 21;11:e77643. doi: 10.7554/eLife.77643

Figure 5. Lateral horn pathway contributes to the expression of polyamine attraction.

(A) In vivo whole brain lightfield calcium imaging upon stimulation with putrescine or vinegar (nsyb-Gal4; UAS-GCaMP6m). Putrescine and vinegar activate different areas in the lateral horn (LH, dotted line). (B) Electron microscopy (EM)-based reconstruction showing projection neurons (PN) innervating the VC5 glomerulus. (C) VC5 PNad (pink) innervates the LH and the mushroom body (MB). (D) T-maze behavioral screen at restrictive temperature at test (30 °C) of candidate LHONs in mated females reveals that two LHON types are required for full attraction to putrescine. ‘empty x shi’ represents the control group and stands for pBDPGAL4;UAS-shits1, the Gal4 vector used to generate all MB-Gal4 lines without an expression driving enhancer. One-way Anova, Bonferroni corrected; p-values: *:<0.05.

Figure 5.

Figure 5—figure supplement 1. Projection neuron and lateral horn neuron connectivity.

Figure 5—figure supplement 1.

(A) Trans-TANGO experiment reveals projection neurons (PNs) connecting the VC5 glomerulus to mushroom body (calyx) and lateral horn (LH). Grey, anti-Ncad stains neuropil, green, anti-GFP shows expression in IR76b neurons (IR76b>mCD8 GFP), magenta, anti-dsred stains expression of trans-TANGO mediated expression of dsRed in synaptically connected neurons including PNs. (B) Trans-TANGO experiment reveals projection neurons (PNs) connecting the VC5 glomerulus to mushroom body (calyx) and lateral horn (LH). Grey, anti-Ncad stains neuropil, green, anti-GFP shows expression in IR76b neurons (IR41a>mCD8 GFP), magenta, anti-dsred stains expression of trans-TANGO mediated expression of dsRed in synaptically connected neurons including PNs. (B’) Higher magnification of images shown in (B). (C) NeuPrint-generated connectome of VC5 adPN and its synaptic connections to the LHON AD1b2. (D) EM-Reconstruction. LHON aSP-g receives input from the DA1 PN. Note that the DA glomerulus is responds to the pheromone cVA. (E) mCD8-GFP expression driven by Split-Gal4 lines L1538. (F) mCD8-GFP expression driven by Split-Gal4 lines L1539. (G) mCD8-GFP expression driven by Split-Gal4 lines L1779. (H) NeuPrint-generated connectome between VC5/polyamine sensitive ORNs and PAM-β’1. (I) NeuPrint-generated connectome between VC5/polyamine sensitive ORNs and PAM-β’1.