| Title: | Comparison of male antennal morphology and sensilla physiology for sex pheromone olfactory sensing between sibling moth species: Ectropis grisescens and Ectropis obliqua (Geometridae) |
| Author(s): | Jing L; Zhaoqun L; Zongxiu L; Xiaoming C; Lei B; Zhaojun X; Chen Z; |
| Address: | "Research Center of Agricultural Products Quality Safety, Tea Research Institute, Chinese Academy of Agricultural Sciences, Hangzhou, Xihu District, China" |
| Journal Title: | Arch Insect Biochem Physiol |
| ISSN/ISBN: | 1520-6327 (Electronic) 0739-4462 (Linking) |
| Abstract: | "Ectropis grisescens and Ectropis obliqua (Lepidoptera: Geometridae) are sibling pest species that co-occur on tea plants. The sex pheromone components of both species contain (Z,Z,Z)-3,6,9-octadecatriene and (Z,Z)-3,9-cis-6,7-epoxy-octadecadiene. E. obliqua has (Z,Z)-3,9-cis-6,7-epoxy-nonadecadiene as an additional sex pheromone component, which ensures reproductive segregation between the two species. To ascertain the detection mechanism of olfactory organs for sex pheromone components of E. grisescens and E. obliqua, we applied scanning electron microscopy and single sensillum recording to compare antennal morphology and sensillum physiology in the two species. There was no apparent morphological difference between the antennae of the two species. Both species responded similarly to all three sex pheromone components, including, E. obliqua specific component. The distribution patterns of antennal sensilla trichodea differed between the two species. Sex pheromone olfactory sensing in these sibling species appears to be determined by the density of different types of olfactory sensing neurons. Dose-dependent responses of sensilla trichodea type 1 to (Z,Z)-3,9-cis-6,7-epoxy-octadecadiene, the most abundant component, showed an 'all or none' pattern and the other two components showed sigmoidal dose-response curves with a half threshold of 10(-4) (dilution equal to the concentration of 10 mug/mul). These results suggest that the major sex pheromone component functions as an on-off controller while secondary components function as modulators during olfactory transmission to the primary olfactory center" |
| Keywords: | "Animals Arthropod Antennae/*ultrastructure Male Microscopy, Electron, Scanning Moths/*physiology/ultrastructure Reproductive Isolation Sensilla/*drug effects Sex Attractants/chemistry/*pharmacology Smell/physiology Species Specificity olfactory sensing ne;" |
| Notes: | "MedlineJing, Liu Zhaoqun, Li Zongxiu, Luo Xiaoming, Cai Lei, Bian Zhaojun, Xin Chen, Zongmao eng 31701795/National Natural Science Foundation of China/ 1610212018011/Central Public-interest Scientific Institution Basal Research Fund/ Comparative Study 2019/03/15 Arch Insect Biochem Physiol. 2019 May; 101(1):e21545. doi: 10.1002/arch.21545. Epub 2019 Mar 14" |
