Modulation of the sex pheromone detection by nutritional and hormonal signals in a male insect

Journal of Experimental Biology, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 16, 2025

As in other animals, insects can modulate their odor-guided behaviors, especially sexual behavior, according to environmental and physiological factors such as the individual's nutritional state. This behavioral flexibility results from modifications of olfactory pathways under control hormones. Most studies have focused on central modulation system less attention has been paid peripheral system. To understand how inputs influence detection sex pheromones insects, we turned male moth Agrotis ipsilon for which responsiveness is dependent diet reproductive hormones, juvenile hormone (JH) 20-hydroxyecdysone (20E). We demonstrated that a sugar-rich with sodium increases sensitivity receptor neurons (Z)-7-dodecen-1-yl acetate, major pheromone compound, antennal expression binding protein (PBP2) (OR3). Such also induces overexpression Methoprene-tolerant JH underexpression ecdysone 20E antennae. The diet-induced responses were maintained by treatment Cucurbitacin B, antagonist, but suppressed topic application Precocene, biosynthesis inhibitor. These findings reveal positive state enhances through actions actors moths. More broadly our study provides, first time, neuronal molecular basis dietary-dependent endocrine

Language: Английский

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The Neuropeptide Sulfakinin, a peripheral regulator of insect behavioral switch between mating and foraging

Published: Feb. 14, 2025

Behavioral strategies for foraging and reproduction in the oriental fruit fly ( Bactrocera dorsalis ) are alternative options resource allocation controlled by neuropeptides. Here we show that behavioral switch between is associated with changes antennal sensitivity. Starved flies became more sensitive to food odors while suppressing their response opposite-sex pheromones. The gene encoding sulfakinin receptor 1 SkR1 was significantly upregulated antennae of starved flies, so tested phenotypes null mutants genes skr1 −/− its ligand sk ). In both knockout lines, responses shifted mating mode even when were starved. This suggests signaling via promotes mating. Further analysis mutant revealed sets odorant (OR) differentially expressed. Functional characterization expressed ORs suggested directly suppresses expression respond hormones enhancing detect volatiles. We conclude SkR1, modulating OR expressions leading altered antenna sensitivities, an important component starvation-dependent change.

Language: Английский

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The Neuropeptide Sulfakinin, a peripheral regulator of insect behavioral switch between mating and foraging

Published: April 9, 2025

Behavioral strategies for foraging and reproduction in the oriental fruit fly ( Bactrocera dorsalis ) are alternative options resource allocation controlled by neuropeptides. Here we show that behavioral switch between is associated with changes antennal sensitivity. Starved flies became more sensitive to food odors while suppressing their response opposite-sex pheromones. The gene encoding sulfakinin receptor 1 SkR1 was significantly upregulated antennae of starved flies, so tested phenotypes null mutants genes skr1 -/- its ligand sk ). In both knockout lines, responses shifted mating mode even when were starved. This suggests signaling via promotes mating. Further analysis mutant revealed sets odorant (OR) differentially expressed. Functional characterization expressed ORs suggested directly suppresses expression respond hormones enhancing detect volatiles. We conclude SkR1, modulating OR expressions leading altered antenna sensitivities, an important component starvation-dependent change.

Language: Английский

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The neuropeptide sulfakinin is a peripheral regulator of insect behavioral switch between mating and foraging

eLife, Journal Year: 2025, Volume and Issue: 13

Published: May 2, 2025

Behavioral strategies for foraging and reproduction in the oriental fruit fly ( Bactrocera dorsalis ) are alternative options resource allocation controlled by neuropeptides. Here, we show that behavioral switch between is associated with changes antennal sensitivity. Starved flies became more sensitive to food odors while suppressing their response opposite-sex pheromones. The gene encoding sulfakinin receptor 1 SkR1 was significantly upregulated antennae of starved flies, so tested phenotypes null mutants genes skr1 –/– its ligand sk ). In both knockout lines, responses shifted mating mode even when were starved. This suggests signaling via promotes mating. Further analysis mutant revealed sets odorant (OR) differentially expressed. Functional characterization expressed ORs suggested directly suppresses expression respond hormones enhancing detect volatiles. We conclude SkR1, modulating OR expressions leading altered antenna sensitivities, an important component starvation-dependent change.

Language: Английский

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The Neuropeptide Sulfakinin, a peripheral regulator of insect behavioral switch between mating and foraging

Published: Nov. 1, 2024

Behavioral strategies for foraging and reproduction in the oriental fruit fly ( Bactrocera dorsalis ) are alternative options resource allocation controlled by neuropeptides. Here we show that behavioral switch between is associated with changes antennal sensitivity. Starved flies became more sensitive to food odors while suppressing their response opposite-sex pheromones. The gene encoding sulfakinin receptor 1 SkR1 was significantly upregulated antennae of starved flies, so tested phenotypes null mutants genes skr1 −/− its ligand sk ). In both knockout lines, responses shifted mating mode even when were starved. This suggests signaling via promotes mating. Further analysis mutant revealed sets odorant (OR) differentially expressed. Functional characterization expressed ORs suggested directly suppresses expression respond hormones enhancing detect volatiles. We conclude SkR1, modulating OR expressions leading altered antenna sensitivities, an important component starvation-dependent change.

Language: Английский

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The Neuropeptide Sulfakinin, a peripheral regulator of insect behavioral switch between mating and foraging

bioRxiv (Cold Spring Harbor Laboratory), Journal Year: 2024, Volume and Issue: unknown

Published: July 31, 2024

Abstract Behavioral strategies for foraging and reproduction in the oriental fruit fly ( Bactrocera dorsalis ) are alternative options resource allocation controlled by neuropeptides. Here we show that behavioral switch between is associated with changes antennal sensitivity. Starved flies became more sensitive to food odors while suppressing their response opposite-sex pheromones. The gene encoding sulfakinin receptor 1 SkR1 was significantly upregulated antennae of starved flies, so tested phenotypes null mutants genes skr1 −/− its ligand sk ). In both knockout lines, responses shifted mating mode even when were starved. This suggests signaling via promotes mating. Further analysis mutant revealed sets odorant (OR) differentially expressed. Functional characterization expressed ORs suggested directly suppresses expression respond hormones enhancing detect volatiles. We conclude SkR1, modulating OR expressions leading altered antenna sensitivities, an important component starvation-dependent change.

Language: Английский

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Electroantennographic and behavioral responses of Bactorcera dorsalis (Diptera: Tephritidae) adults to the volatiles of plum fruits

Journal of Economic Entomology, Journal Year: 2024, Volume and Issue: unknown

Published: Oct. 11, 2024

Fruit volatiles play a crucial role in the host localization by oriental fruit fly, Bactrocera dorsalis Hendel (Diptera: Tephritidae). This study focused on identifying from Sanyue plum and Sanhua (Prunus salicina Lindl.), which are 2 varieties of same species, examined their impact behavior B. using Y-olfactometer. A total 35 54 were identified, respectively. Among these, 23 elicited electroantennographic (EAG) responses adults, showing concentration-dependent effects males females. Ethyl butyrate, butyl acetate, hexanoate, ethyl caproate, hexyl acetate significantly attracted compared to liquid paraffin, while nonaldehyde was avoided. There no significant difference behavioral both sexes sorbitol esters, isobutyrate, 1-tetradecene with control paraffin group. Interestingly, (3Z)-C-3-hexenyl females, but not males. The above findings suggest that likely facilitate adults may even aid mate-finding. opens up new avenues for exploring novel plant-based attractants might be value integrated management dorsalis.

Language: Английский

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The Neuropeptide Sulfakinin, a peripheral regulator of insect behavioral switch between mating and foraging

Published: Nov. 1, 2024

Behavioral strategies for foraging and reproduction in the oriental fruit fly (Bactrocera dorsalis) are alternative options resource allocation controlled by neuropeptides. Here, we show that behavioral switch between is associated with changes antennal sensitivity. Starved flies became more sensitive to food odors while suppressing their response opposite-sex pheromones. The gene encoding sulfakinin receptor 1 (SkR1) was significantly upregulated antennae of starved flies, so tested phenotypes null mutants genes (skr1-/-) its ligand (sk-/-). In both knockout lines, responses shifted mating mode even when were starved. This suggests signaling via SkR1 promotes mating. Further analysis mutant revealed sets odorant (OR) differentially expressed. Functional characterization expressed ORs suggested directly suppresses expression respond hormones enhancing detect volatiles. We conclude SkR1, modulating OR expressions leading altered antenna sensitivities, an important component starvation-dependent change.

Language: Английский

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