NO INHIBITORY EFFECT ON RECEPTOR NEURON ACTIVITY BY SULFUR ANALOGS OFTHE SEX-PHEROMONE COMPONENT (Z)-5-DECENYL ACETATE IN THE TURNIP MOTH,AGROTIS-SEGETUM (LEPIDOPTERA, NOCTUIDAE)
Bs. Hansson et al., NO INHIBITORY EFFECT ON RECEPTOR NEURON ACTIVITY BY SULFUR ANALOGS OFTHE SEX-PHEROMONE COMPONENT (Z)-5-DECENYL ACETATE IN THE TURNIP MOTH,AGROTIS-SEGETUM (LEPIDOPTERA, NOCTUIDAE), Physiological entomology, 21(4), 1996, pp. 275-282
Olfactory responses from the entire antenna and from single antennal s
ensilla of the male turnip moth, Agrotis segetum (Lepidoptea: Noctuida
e Schiff.), were recorded after stimulation of the antenna with the se
x pheromone component, (Z)-5-decenyl acetate (Z5-10:OAc), and three su
lphur analogues of this compound. Adaptation of olfactory receptor neu
rones tuned to Z5-10:OAc was investigated after pre-exposure of these
receptor neurones to the key stimulus and to the three sulphur analogu
es. Both electro-antennographic and single sensillum recordings reveal
ed that the sulphur analogues had a significantly decreased effect com
pared to the natural stimulus. The pre-exposure experiments demonstrat
ed that no further inhibition of neural activity was observed than cou
ld be expected from receptor neurone adaptation. Earlier reports, desc
ribing sulphur analogues as possible hyperagonists acting on moth pher
omone receptor neurones, are not supported by the present study.