Age-dependent plasticity of sex pheromone response in the moth, Agrotis ipsilon: Combined effects of octopamine and juvenile hormone

Jarriault, David; Barrozo, Romina B.; Pinto, C.; Greiner, Birgit; Dufour, Marie‐Cécile; Masante-Roca, Ingwild; Gramsbergen, Jan Bert; Anton, Sylvia; Gadenne, Christophe

doi:10.1016/j.yhbeh.2009.04.005

Cited by 42 publications

(58 citation statements)

References 60 publications

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“…For instance, octopamine and dopamine are neuromodulators known to regulate activity both in sensory and central olfactory neurons of insects, in particular following exposure to pheromones (Grosmaître et al, 2001;Dolzer et al, 2001;Perk and Mercer, 2006;Vergoz et al, 2009). Studies on several moth species have revealed that octopamine lowers the behavioural response threshold to pheromone (Linn et al, 1986;Linn et al, 1992) and increases the sensitivity of pheromoneresponsive AL neurons (Jarriault et al, 2009). Interestingly, an octopamine/tyramine receptor is expressed in the ORNs of the noctuid moth Mamestra brassicae (Brigaud et al, 2009), suggesting that biogenic amines target the peripheral olfactory neurons and may participate in regulating their transcriptional or electrical activity.…”

Section: Plasticity Occurs At Multiple Levels Of the Olfactory Pathwaymentioning

confidence: 99%

Experience-dependent modulation of antennal sensitivity and input to antennal lobes in male moths (Spodoptera littoralis) pre-exposed to sex pheromone

Guerrieri

Gemeno

Monsempes

et al. 2012

Journal of Experimental Biology

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SUMMARYSex pheromones are intraspecific olfactory signals emitted by one sex to attract a potential mating partner. Behavioural responses to sex pheromones are generally highly stereotyped. However, they can be modulated by experience, as male moths previously exposed to female sex pheromone respond with a lower threshold upon further detection, even after long delays. Here, we address the question of the neural mechanisms underlying such long-term modulation. As previous work has shown increased responses to pheromone in central olfactory neurons, we asked whether brief exposure to the pheromone increases input activity from olfactory receptor neurons. Males pre-exposed to sex pheromone exhibited increased peripheral sensitivity to the main pheromone component. Among nine antennal genes targeted as putatively involved in pheromone reception, one encoding a pheromone-binding protein showed significant upregulation upon exposure. In the primary olfactory centre (antennal lobe), the neural compartment processing the main pheromone component was enlarged after a brief pheromone exposure, thus suggesting enduring structural changes. We hypothesise that higher peripheral sensitivity following pre-exposure leads to increased input to the antennal lobe, thus contributing to the structural and functional reorganization underlying a stable change in behaviour.

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Section: Plasticity Occurs At Multiple Levels Of the Olfactory Pathwaymentioning

confidence: 99%

Experience-dependent modulation of antennal sensitivity and input to antennal lobes in male moths (Spodoptera littoralis) pre-exposed to sex pheromone

Guerrieri

Gemeno

Monsempes

et al. 2012

Journal of Experimental Biology

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“…For wind tunnel experiments, sex pheromone gland extracts (three female-equivalents) were prepared as described previously (Jarriault et al, 2009a). In the electrophysiological experiments, hexane dilutions in decadic steps of the artificial pheromone blend from 1 pg to 100ng were applied to a filter paper and introduced in a Pasteur pipette.…”

Section: Stimulimentioning

confidence: 99%

“…NaCl containing either 30 mg OA or 10 mg 5-HT (Sigma) in the abdomen (150 mg g -1 or 50 mg g -1 body mass, respectively) before the onset of the scotophase (Jarriault et al, 2009a). Control experiments were performed by injection of NaCl.…”

Section: Pharmacologymentioning

confidence: 99%

“…In A. ipsilon, OA interacts with JH to control the age-dependent plasticity of pheromone responses (Jarriault et al, 2009a). In particular, OA treatments enhance both the behavioural and the central nervous responses to sex pheromone (Jarriault et al, 2009a).…”

Section: Introductionmentioning

confidence: 99%

“…In particular, OA treatments enhance both the behavioural and the central nervous responses to sex pheromone (Jarriault et al, 2009a). In this species, mating could eventually also trigger modulatory actions of biogenic amines that affect pheromone responses of male moths.…”

Section: Introductionmentioning

confidence: 99%

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Mating-induced transient inhibition of responses to sex pheromone in a male moth is not mediated by octopamine or serotonin

Barrozo¹,

Jarriault²,

Simeone³

et al. 2010

Journal of Experimental Biology

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SUMMARYIn the male moth, Agrotis ipsilon, mating induces a transient inhibition of behavioural and central nervous responses to sex pheromone. Newly mated males are not attracted to sex pheromone, and the sensitivity of their antennal lobe (AL) neurons is lower than in virgin males. This rapid transient olfactory inhibition prevents them from re-mating unsuccessfully until they have refilled their sex glands. We hypothesized that this olfactory 'switch off' might be controlled by neuromodulators such as biogenic amines. To test our hypothesis, we studied the effects of octopamine (OA) and serotonin (5-hydroxytryptamine, 5-HT) on the coding properties of pheromone-sensitive AL neurons in virgin and newly mated males. We show that AL neuron sensitivity increased in newly mated males after injection of OA or 5-HT, but only OA treatment affected certain response characteristics of AL neurons in virgin males. Whereas all measured AL neuron response characteristics were different between virgin and newly mated males, amine treatment in newly mated males restored only the latency and spike frequency, but not the duration of excitatory and inhibitory phases, which were initially found in virgin males. Additionally, we investigated the behavioural effects of OA and 5-HT treatments in virgin and mated males. Although OA and 5-HT enhanced the general flight activity of newly mated males, amine treatments did not restore the behavioural pheromone response of mated moths. Altogether, these results show that, although biogenic amines modulate the olfactory system in moths, OA and 5-HT are probably not involved in the post-mating inhibition of responses to sex pheromone in A. ipsilon males.

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Features of floral odor and nectar in the distylous Luculia pinceana (Rubiaceae) promote compatible pollination by hawkmoths

Wang

Chen

2023

Ecology and Evolution

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Age-dependent plasticity of sex pheromone response in the moth, Agrotis ipsilon: Combined effects of octopamine and juvenile hormone

Cited by 42 publications

References 60 publications

Experience-dependent modulation of antennal sensitivity and input to antennal lobes in male moths (Spodoptera littoralis) pre-exposed to sex pheromone

Experience-dependent modulation of antennal sensitivity and input to antennal lobes in male moths (Spodoptera littoralis) pre-exposed to sex pheromone

Mating-induced transient inhibition of responses to sex pheromone in a male moth is not mediated by octopamine or serotonin

Features of floral odor and nectar in the distylous Luculia pinceana (Rubiaceae) promote compatible pollination by hawkmoths

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