The allelochemical tannic acid affects the locomotion and feeding behaviour of the pond snail, Lymnaea stagnalis, by inhibiting peripheral pathways
| Autor: | Anna Farkas, Ágnes Vehovszky, Réka Horváth, Károly Elekes, János Győri |
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| Rok vydání: | 2019 |
| Předmět: |
0301 basic medicine
medicine.medical_specialty Sucrose Efferent Lymnaea stagnalis Snail 03 medical and health sciences Cellular and Molecular Neuroscience chemistry.chemical_compound 0302 clinical medicine Developmental Neuroscience Internal medicine biology.animal Tannic acid medicine Animals Lymnaea biology Feeding Aquatic animal Feeding Behavior biology.organism_classification Ganglia Invertebrate Electrophysiology 030104 developmental biology Endocrinology chemistry Allelochemicals Original Article Peripheral pathways Tannins Locomotion 030217 neurology & neurosurgery |
| Zdroj: | Invertebrate Neuroscience |
| ISSN: | 1439-1104 1354-2516 |
| DOI: | 10.1007/s10158-019-0229-7 |
| Popis: | (1) The effect of tannic acid (TA), a dominant component of plant allelochemicals, was investigated on the locomotion and feeding of the pond snail, Lymnaea stagnalis. The effect of TA on the neuronal background underlying feeding activity was also analysed. (2) TA affected the spontaneous locomotion and of juvenile snails in a concentration-dependent way. Low (10 μM) TA concentration resulted in an increased (sliding or swimming) activity compared to the control; meanwhile, high (100 μM) TA concentration inhibited the locomotion of the animals. (3) Low (10 μM) TA concentration increased the frequency of sucrose-evoked feeding of intact animals, whereas high (100 μM) TA concentration resulted in significantly longer feeding latency and decreased feeding rate. The feeding changes proved to be partially irreversible, since after 48 h maintained in clear water, the animals tested in 100 μM TA previously still showed lower feeding rate in sucrose. (4) Electrophysiological experiments on semi-intact preparations showed that application of 100 μM TA to the lip area inhibited the fictive feeding pattern of central neurons, the cellular response to sucrose. (5) On isolated CNS preparation, 100 μM TA applied in the bathing solution, however, failed to inhibit the activation of the central feeding (CPG) interneurons following application of extracellular dopamine. Our results suggest that TA affects both afferent and efferent peripheral functions in Lymnaea. TA reduces feeding activity by primarily blocking feeding sensory pathways, and its negative effect on locomotion may imply sensory pathways and/or ciliary activity. |
| Databáze: | OpenAIRE |
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