TY - JOUR
T1 - Identification and functional characterization of sex pheromone receptors in beet armyworm Spodoptera exigua (Hubner)
AU - Liu, Chengcheng
AU - Liu, Yang
AU - Walker, William
AU - Dong, Shuanglin
AU - Wang, Guirong
PY - 2013
Y1 - 2013
N2 - In moths, males can detect a distinct blend of several pheromone components by specialized olfactory receptor neurons (ORNs) on the antennae. Four candidate pheromone receptors (PR) with seven transmembrane domains were identified by homology cloning from the antennae of Spodoptera exigua (Sexi). Phylogenetic analyses reveal that all four odorant receptors (OR) belong to pheromone receptor subtypes. Expression patterns revealed that PRs were male-specific in the antenna except for SexiOR11, which was female antenna-biased. Functional analyses of these PRs were conducted using heterologous expression in Xenopus oocytes. SexiOR13 and SexiOR16 were all broadly activated by multiple pheromone components. SexiOR13 responded robustly to the critical pheromone component, Z9, E12-14:OAc and the minor pheromone component, Z9-14:OAc at a concentration of 10(-4) M. Dose-response studies indicate that SexiOR13 was approximately 4 times more sensitive to Z9,E12-14:OAc (EC50 = 3.158 x 10(-6) M) compared to Z9-14:OAc (EC50 = 1.203 x 10(-5) M). While, SexiOR16 responded robustly to the secondary pheromone component Z9-14:OH with high sensitivity (EC50 = 9.690 x 10(-7) M). However, similar tests of the five pheromones with SexiOR6 and SexiOR11 failed to elicit any response. These results provide basic knowledge to further advance research on the molecular mechanisms of pheromone reception. (C) 2013 Elsevier Ltd. All rights reserved.
AB - In moths, males can detect a distinct blend of several pheromone components by specialized olfactory receptor neurons (ORNs) on the antennae. Four candidate pheromone receptors (PR) with seven transmembrane domains were identified by homology cloning from the antennae of Spodoptera exigua (Sexi). Phylogenetic analyses reveal that all four odorant receptors (OR) belong to pheromone receptor subtypes. Expression patterns revealed that PRs were male-specific in the antenna except for SexiOR11, which was female antenna-biased. Functional analyses of these PRs were conducted using heterologous expression in Xenopus oocytes. SexiOR13 and SexiOR16 were all broadly activated by multiple pheromone components. SexiOR13 responded robustly to the critical pheromone component, Z9, E12-14:OAc and the minor pheromone component, Z9-14:OAc at a concentration of 10(-4) M. Dose-response studies indicate that SexiOR13 was approximately 4 times more sensitive to Z9,E12-14:OAc (EC50 = 3.158 x 10(-6) M) compared to Z9-14:OAc (EC50 = 1.203 x 10(-5) M). While, SexiOR16 responded robustly to the secondary pheromone component Z9-14:OH with high sensitivity (EC50 = 9.690 x 10(-7) M). However, similar tests of the five pheromones with SexiOR6 and SexiOR11 failed to elicit any response. These results provide basic knowledge to further advance research on the molecular mechanisms of pheromone reception. (C) 2013 Elsevier Ltd. All rights reserved.
KW - Spodoptera exigua
KW - Pheromone receptor gene
KW - (Z,E)-9,12-tetradecadienyl acetate
KW - (Z)-9-tetradecenol
KW - Xenopus oocytes
KW - Spodoptera exigua
KW - Pheromone receptor gene
KW - (Z,E)-9,12-tetradecadienyl acetate
KW - (Z)-9-tetradecenol
KW - Xenopus oocytes
UR - https://res.slu.se/id/publ/54539
U2 - 10.1016/j.ibmb.2013.05.009
DO - 10.1016/j.ibmb.2013.05.009
M3 - Journal article
C2 - 23751753
SN - 0965-1748
VL - 43
SP - 747
EP - 754
JO - Insect Biochemistry and Molecular Biology
JF - Insect Biochemistry and Molecular Biology
IS - 8
ER -