| Autor: |
Sieriebriennikov B; Department of Biology, New York University, New York, NY 10003, USA.; Department of Biochemistry and Molecular Pharmacology, New York University School of Medicine, New York, NY 10016, USA.; Department of Biology, University of Florida, Gainesville, FL 32611, USA., Sieber KR; Department of Biology, University of Florida, Gainesville, FL 32611, USA.; Center for Smell and Taste, University of Florida, Gainesville, FL 32610, USA., Kolumba O; Department of Biology, New York University, New York, NY 10003, USA.; New York University Abu Dhabi, Abu Dhabi, United Arab Emirates., Mlejnek J; Department of Biology, New York University, New York, NY 10003, USA., Jafari S; Department of Biology, New York University, New York, NY 10003, USA., Yan H; Department of Biology, University of Florida, Gainesville, FL 32611, USA.; Center for Smell and Taste, University of Florida, Gainesville, FL 32610, USA. |
| Abstrakt: |
Olfaction is essential for complex social behavior in insects. To discriminate complex social cues, ants evolved an expanded number of odorant receptor ( Or ) genes. Mutations in the obligate odorant co-receptor gene orco lead to the loss of ~80% of the antennal lobe glomeruli in the jumping ant Harpegnathos saltator . However, the cellular mechanism remains unclear. Here, we demonstrate massive apoptosis of odorant receptor neurons (ORNs) in the mid to late stages of pupal development, possibly due to ER stress in the absence of Orco. Further bulk and single-nucleus transcriptome analysis shows that, although most orco -expressing ORNs die in orco mutants, a small proportion of them survive: They express ionotropic receptor ( Ir ) genes that form IR complexes. In addition, we found that some Or genes are expressed in mechanosensory neurons and nonneuronal cells, possibly due to leaky regulation from nearby non- Or genes. Our findings provide a comprehensive overview of ORN development and Or expression in H. saltator . |
