Bitter stimuli modulate the feeding decision of a blood-sucking insect via two sensory inputs
The gustatory system of animals is involved in food quality assessment and controls the feeding decision of an individual confronted with a potential alimentary source. Triatomines are haematophagous insects that feed on vertebrate blood. Once they reach a potential host, they walk over the host ski...
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2014
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| Acceso en línea: | https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00220949_v217_n20_p3708_Pontes http://hdl.handle.net/20.500.12110/paper_00220949_v217_n20_p3708_Pontes |
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paper:paper_00220949_v217_n20_p3708_Pontes2023-06-08T14:45:37Z Bitter stimuli modulate the feeding decision of a blood-sucking insect via two sensory inputs Bitter Blood-sucking Feeding behavior Plasticity Taste sensilla Animalia Hexapoda Vertebrata alkaloid benzyl alcohol derivative glucoside salicin animal animal behavior antenna (organ) drug effects eating electrophysiology feeding behavior inhibition (psychology) larva parasite physiology Rhodnius sensillum taste ultrastructure Alkaloids Animals Arthropod Antennae Behavior, Animal Benzyl Alcohols Eating Electrophysiological Processes Feeding Behavior Glucosides Inhibition (Psychology) Larva Parasites Rhodnius Sensilla Taste The gustatory system of animals is involved in food quality assessment and controls the feeding decision of an individual confronted with a potential alimentary source. Triatomines are haematophagous insects that feed on vertebrate blood. Once they reach a potential host, they walk over the host skin searching for an adequate site to pierce. Then, they insert their stylets and take a first sampling gorge to decide whether food is acceptable. Our work reveals that the presence of bitter compounds inhibits the feeding behavior of these bugs. Firstly, triatomines decreased their feeding behavior if substrates spread with quinine or caffeine were detected by external receptors localized exclusively in the antennae. Morphological inspections along with electrophysiological recordings revealed the existence of four gustatory sensilla located in the tip of the antenna that respond to both bitter tastants. The absence of these bitter detectors by antennal ablation reversed the observed feeding inhibition evoked by bitter compounds. Secondly, once triatomines pumped the first volume of food with bitter compounds (quinine, caffeine, berberine, salicin), a decrease in their feeding behavior was observed. Morphological inspections revealed the existence of eight gustatory sensilla located in the pharynx that might be responsible for the internal bitter detection. Finally, we found that a brief pre-exposure to bitter compounds negatively modulates the motivation of bugs to feed on an appetitive solution. Results presented here highlight the relevance of bitter taste perception in the modulation of the feeding behavior of a blood-sucking insect. ©2014. Published by The Company of Biologists Ltd. 2014 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00220949_v217_n20_p3708_Pontes http://hdl.handle.net/20.500.12110/paper_00220949_v217_n20_p3708_Pontes |
| institution |
Universidad de Buenos Aires |
| institution_str |
I-28 |
| repository_str |
R-134 |
| collection |
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) |
| topic |
Bitter Blood-sucking Feeding behavior Plasticity Taste sensilla Animalia Hexapoda Vertebrata alkaloid benzyl alcohol derivative glucoside salicin animal animal behavior antenna (organ) drug effects eating electrophysiology feeding behavior inhibition (psychology) larva parasite physiology Rhodnius sensillum taste ultrastructure Alkaloids Animals Arthropod Antennae Behavior, Animal Benzyl Alcohols Eating Electrophysiological Processes Feeding Behavior Glucosides Inhibition (Psychology) Larva Parasites Rhodnius Sensilla Taste |
| spellingShingle |
Bitter Blood-sucking Feeding behavior Plasticity Taste sensilla Animalia Hexapoda Vertebrata alkaloid benzyl alcohol derivative glucoside salicin animal animal behavior antenna (organ) drug effects eating electrophysiology feeding behavior inhibition (psychology) larva parasite physiology Rhodnius sensillum taste ultrastructure Alkaloids Animals Arthropod Antennae Behavior, Animal Benzyl Alcohols Eating Electrophysiological Processes Feeding Behavior Glucosides Inhibition (Psychology) Larva Parasites Rhodnius Sensilla Taste Bitter stimuli modulate the feeding decision of a blood-sucking insect via two sensory inputs |
| topic_facet |
Bitter Blood-sucking Feeding behavior Plasticity Taste sensilla Animalia Hexapoda Vertebrata alkaloid benzyl alcohol derivative glucoside salicin animal animal behavior antenna (organ) drug effects eating electrophysiology feeding behavior inhibition (psychology) larva parasite physiology Rhodnius sensillum taste ultrastructure Alkaloids Animals Arthropod Antennae Behavior, Animal Benzyl Alcohols Eating Electrophysiological Processes Feeding Behavior Glucosides Inhibition (Psychology) Larva Parasites Rhodnius Sensilla Taste |
| description |
The gustatory system of animals is involved in food quality assessment and controls the feeding decision of an individual confronted with a potential alimentary source. Triatomines are haematophagous insects that feed on vertebrate blood. Once they reach a potential host, they walk over the host skin searching for an adequate site to pierce. Then, they insert their stylets and take a first sampling gorge to decide whether food is acceptable. Our work reveals that the presence of bitter compounds inhibits the feeding behavior of these bugs. Firstly, triatomines decreased their feeding behavior if substrates spread with quinine or caffeine were detected by external receptors localized exclusively in the antennae. Morphological inspections along with electrophysiological recordings revealed the existence of four gustatory sensilla located in the tip of the antenna that respond to both bitter tastants. The absence of these bitter detectors by antennal ablation reversed the observed feeding inhibition evoked by bitter compounds. Secondly, once triatomines pumped the first volume of food with bitter compounds (quinine, caffeine, berberine, salicin), a decrease in their feeding behavior was observed. Morphological inspections revealed the existence of eight gustatory sensilla located in the pharynx that might be responsible for the internal bitter detection. Finally, we found that a brief pre-exposure to bitter compounds negatively modulates the motivation of bugs to feed on an appetitive solution. Results presented here highlight the relevance of bitter taste perception in the modulation of the feeding behavior of a blood-sucking insect. ©2014. Published by The Company of Biologists Ltd. |
| title |
Bitter stimuli modulate the feeding decision of a blood-sucking insect via two sensory inputs |
| title_short |
Bitter stimuli modulate the feeding decision of a blood-sucking insect via two sensory inputs |
| title_full |
Bitter stimuli modulate the feeding decision of a blood-sucking insect via two sensory inputs |
| title_fullStr |
Bitter stimuli modulate the feeding decision of a blood-sucking insect via two sensory inputs |
| title_full_unstemmed |
Bitter stimuli modulate the feeding decision of a blood-sucking insect via two sensory inputs |
| title_sort |
bitter stimuli modulate the feeding decision of a blood-sucking insect via two sensory inputs |
| publishDate |
2014 |
| url |
https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00220949_v217_n20_p3708_Pontes http://hdl.handle.net/20.500.12110/paper_00220949_v217_n20_p3708_Pontes |
| _version_ |
1768546193850236928 |