Sunday, 20 May 2018

What gives bees their sweet tooth?



Date:  May 10, 2018
Source:  Newcastle University

Scientists have discovered bees linger on a flower, emptying it of nectar, because they have sugar-sensing taste neurons which work together to prolong the pleasure of the sweetness.

Newcastle University researchers report that the bees' taste neurons found on their proboscis -- their mouthparts -- fire intense signals for up to 10 seconds -- much longer than the taste neurons found in other insects.

Bees visit flowers to obtain nectar, a sugary solution, which they eat to feed their colony and to fuel their flight. Bees can taste sugars on their proboscis and when in contact with food, taste neurons on the proboscis are activated signalling the presence of food.

Publishing in Current Biology, the researchers report that the neurons that specifically respond to sugar exhibit a very intense activation, which persists up to 10 seconds.

While these neurons exhibit intense activity, the bee will remain feeding at the same sugar source. Only when this activity declines does the bee remove its proboscis to enable it to try a further feeding point.


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