Electrophysiological responses of thermo- and hygroreceptor neurons from antennal dome-shaped sen- 32 silla of the carabid beetle Pterostichus oblongopunctatus to different levels of steady temperature ranging 33 from 20 to 35 C and rapid step-changes in it were measured and analysed at both constant relative and 34 absolute ambient air humidity conditions. It appeared that both hygroreceptor neurons respond to tem- 35 perature which means that they are bimodal. For the first time in arthropods, the ability of antennal dry 36 and moist neurons to produce high temperature induced spike bursts is documented. Burstiness of the 37 spike trains is temperature dependent and increases with temperature increase. Threshold temperatures 38 at which the two neurons switch from regular spiking to spike bursting are lower compared to that of the 39 cold neuron, differ and approximately coincide with the upper limit of preferred temperatures of the spe- 40 cies. We emphasise that, in contrast to various sensory systems studied, the hygroreceptor neurons of P. 41 oblongopunctatus have stable and continuous burst trains, no temporal information is encoded in the tim- 42 ing of the bursts. We hypothesise that temperature dependent spike bursts produced by the antennal 43 thermo- and hygroreceptor neurons may be responsible for detection of noxious high temperatures 44 important in behavioural thermoregulation of carabid beetles.

Nurme, K., Merivee, E., Must, A., Sibul, I., Muzzi, M., DI GIULIO, A., et al. (2015). Responses of the antennal bimodal hygroreceptor neurons to innocuous and noxious high temperatures in the carabid beetle, Pterostichus oblongopunctatus. JOURNAL OF INSECT PHYSIOLOGY, 81, 1-13 [10.1016/j.jinsphys.2015.06.010].

Responses of the antennal bimodal hygroreceptor neurons to innocuous and noxious high temperatures in the carabid beetle, Pterostichus oblongopunctatus

DI GIULIO, ANDREA;
2015-01-01

Abstract

Electrophysiological responses of thermo- and hygroreceptor neurons from antennal dome-shaped sen- 32 silla of the carabid beetle Pterostichus oblongopunctatus to different levels of steady temperature ranging 33 from 20 to 35 C and rapid step-changes in it were measured and analysed at both constant relative and 34 absolute ambient air humidity conditions. It appeared that both hygroreceptor neurons respond to tem- 35 perature which means that they are bimodal. For the first time in arthropods, the ability of antennal dry 36 and moist neurons to produce high temperature induced spike bursts is documented. Burstiness of the 37 spike trains is temperature dependent and increases with temperature increase. Threshold temperatures 38 at which the two neurons switch from regular spiking to spike bursting are lower compared to that of the 39 cold neuron, differ and approximately coincide with the upper limit of preferred temperatures of the spe- 40 cies. We emphasise that, in contrast to various sensory systems studied, the hygroreceptor neurons of P. 41 oblongopunctatus have stable and continuous burst trains, no temporal information is encoded in the tim- 42 ing of the bursts. We hypothesise that temperature dependent spike bursts produced by the antennal 43 thermo- and hygroreceptor neurons may be responsible for detection of noxious high temperatures 44 important in behavioural thermoregulation of carabid beetles.
2015
Nurme, K., Merivee, E., Must, A., Sibul, I., Muzzi, M., DI GIULIO, A., et al. (2015). Responses of the antennal bimodal hygroreceptor neurons to innocuous and noxious high temperatures in the carabid beetle, Pterostichus oblongopunctatus. JOURNAL OF INSECT PHYSIOLOGY, 81, 1-13 [10.1016/j.jinsphys.2015.06.010].
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11590/117198
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