Chronic and Acute Oral Administration of Caffeine Enhance Performance of Olfactory Learning in Crickets
- PMID: 32729714
- DOI: 10.2108/zs190133
Chronic and Acute Oral Administration of Caffeine Enhance Performance of Olfactory Learning in Crickets
Abstract
Crickets were arbitrarily fed a caffeine-containing diet during their lifetime or were orally administered caffeine in solution once during the conditioning session. These chronically or acutely treated crickets were used to test whether there were positive effects of caffeine on their learning performance. The effects of chronic exposure to caffeine on crickets' growth were also examined by measuring their body weight and counting the number of adults that emerged from larvae. Chronic treatment with relatively high concentrations of caffeine (5 mg/g and 0.5 mg/g in the diet) impaired the growth of crickets. Mortality was higher with 5 mg/g caffeine, and the survivors could not attain the final molt (eclosion). Body weight gain and eclosion rate were also negatively influenced in the group fed 0.5 mg/g caffeine. The olfactory learning paradigm was used to examine the effects of chronic caffeine treatment. Of the caffeine concentrations tested (0.5 µg/g to 0.5 mg/g), significant improvement in long-term memory (LTM) formation was observed only with 50 µg/g caffeine. Acute effects on olfactory learning were examined after oral administration of 0.1 nM to 10 µM caffeine solutions during the conditioning session. Administration of caffeine ≥ 1 nM consistently resulted in a significant improvement in LTM formation. These results suggest that chronic exposure to caffeine enhances learning performance in crickets at a specific dose (50 µg/g in the diet), although it inhibits their growth at higher doses (≥ 0.5 mg/g). In contrast, acute oral administration of caffeine in naive crickets may enhance their learning performance even at a very low (nanomolar) concentration.
Keywords: acute; caffeine; chronic; cricket; growth; olfactory learning.
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References
-
- Andretic R, Kim YC, Jones FS, Han KA, Greenspan RJ (2008) <italic>Drosophila</italic> D1 dopamine receptor mediates caffeine-induced arousal. Proc Natl Acad Sci USA 105: 20392–20397
-
- Apostolopoulou AA, Köhn S, Stehle B, Lutz M, Wüst A, Mazija L, et al. (2016) Caffeine taste signaling in <italic>Drosophila</italic> larvae. Front Cell Neurosci 10: 193
-
- Ashihara H, Sano H, Crozier A (2008) Caffeine and related purine alkaloids: biosynthesis, catabolism, function and genetic engineering. Phytochemistry 69: 841–856
-
- Azeez OM (2017) Comparative plant resistance in fifty-five tea accessions, <italic>Camellia sinensis</italic> L., in Ibadan, South West, Nigeria. J Biopest 10: 146–153
-
- Bernays EA, Oppenheim S, Chapman RF, Kwon H, Gould F (2000) Taste sensitivity of insect herbivores to deterrents is greater in specialists than in generalists: a behavioral test of the hypothesis with two closely related caterpillars. J Chem Ecol 26: 547–563
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