Olfactory Detectability of L-Amino Acids in the found Honeybee. The forager honeybee’s intake of proline, a non-essential AA is used by bees as fuel for flight commonly found in nectar. It is modulated by its concentration in solution such that bees preferred concentrations around 6 mM and consumed significantly less of sucrose solution containing 100 mM proline. . Proline is the most dominant amino acid in honey bee hemolymph that is used preferably a suitable metabolic fuel because they possess receptors for L-proline only.
One studied reason is to increase cold-resistance.
Please see attached paper:
http://revistas.inia.es/index.php/sjar/article/viewFile/3842/1905water
On the other hand, L.proline is probably not detected by bees based on olfaction, rather on taste. See for this:
http://www.ncbi.nlm.nih.gov/pubmed/22451525
Best regards.
In the foraging and feeding context, honeybees are likely to detect amino acids through taste rather than olfaction. The size of the olfactory receptor repertoire of honeybees limits their olfactory capabilities in terms of detectability and sensitivity for the odor of amino acids
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