| Title: | Interference of plant volatiles on pheromone receptor neurons of male Grapholita molesta (Lepidoptera: Tortricidae) |
| Author(s): | Ammagarahalli B; Gemeno C; |
| Address: | "University of Lleida, Department of Crop and Forest Sciences, Av. Alcalde Rovira Roure 191, 25198 Lleida, Spain. Electronic address: nnnbyrareddy20@gmail.com. University of Lleida, Department of Crop and Forest Sciences, Av. Alcalde Rovira Roure 191, 25198 Lleida, Spain. Electronic address: cesar.gemeno@pvcf.udl.cat" |
| DOI: | 10.1016/j.jinsphys.2015.07.009 |
| ISSN/ISBN: | 1879-1611 (Electronic) 0022-1910 (Linking) |
| Abstract: | "In moths, sex pheromone components are detected by pheromone-specific olfactory receptor neurons (ph-ORNs) housed in sensilla trichodea in the male antennae. In Grapholita molesta, ph-ORNs are highly sensitive and specific to the individual sex pheromone components, and thus help in the detection and discrimination of the unique conspecific pheromone blend. Plant odors interspersed with a sub-optimal pheromone dose are reported to increase male moth attraction. To determine if the behavioral synergism of pheromone and plant odors starts at the ph-ORN level, single sensillum recordings were performed on Z8-12:Ac and E8-12:Ac ph-ORNs (Z-ORNs and E-ORNs, respectively) stimulated with pheromone-plant volatile mixtures. First, biologically meaningful plant-volatile doses were determined by recording the response of plant-specific ORNs housed in sensilla auricillica and trichodea to several plant odorants. This exploration provided a first glance at plant ORNs in this species. Then, using these plant volatile doses, we found that the spontaneous activity of ph-ORNs was not affected by the stimulation with plant volatiles, but that a binary mixture of sex pheromone and plant odorants resulted in a small (about 15%), dose-independent, but statistically significant, reduction in the spike frequency of Z-ORNs with respect to stimulation with Z8-12:Ac alone. The response of E-ORNs to a combination of E8-12:Ac and plant volatiles was not different from E8-12:Ac alone. We argue that the small inhibition of Z-ORNs caused by physiologically realistic plant volatile doses is probably not fully responsible for the observed behavioral synergism of pheromone and plant odors" |
| Keywords: | "Animals Arthropod Antennae/*metabolism Male Malus/chemistry Moths/*physiology Odorants Olfactory Receptor Neurons/*physiology Pheromones/*metabolism Prunus persica/chemistry Receptors, Pheromone/*physiology Sensilla/metabolism Volatile Organic Compounds/*;" |
| Notes: | "MedlineAmmagarahalli, Byrappa Gemeno, Cesar eng Research Support, Non-U.S. Gov't England 2015/07/19 J Insect Physiol. 2015 Oct; 81:118-28. doi: 10.1016/j.jinsphys.2015.07.009. Epub 2015 Jul 16" |
