Reuters - Video

Edition: US | UK | IN | CN | JP

video Eurozone

Protests over anti-Islam film erupt in Belgium
Protests over anti-Islam film erupt in Belgium - 00:47
Market Pulse: Buy Spanish debt when yields near 7%
Market Pulse: Buy Spanish debt when yields near 7% - 05:05
U.S. Morning Call: Investors come down after Fed euphoria
U.S. Morning Call: Investors come down after Fed euphoria - 02:36
Euro crisis watch: Is the pain over?
Euro crisis watch: Is the pain over? - 05:46
Europe Day Ahead: Lingering Spanish doubts halt rally
Europe Day Ahead: Lingering Spanish doubts halt rally - 02:45
Merkel calls for closer coordination
Merkel calls for closer coordination - 01:01
Economy 2012: Tumi CEO says luxury still has growth potential in Asia
Economy 2012: Tumi CEO says luxury still has growth potential in Asia - 05:59
Russia's $5bln bank stake sale
Russia's $5bln bank stake sale - 01:41
Royals go to court over topless pics, Rihanna leads MTV Europe noms
Royals go to court over topless pics, Rihanna leads MTV Europe noms - 01:42
Wall Street rally takes Monday pause
Wall Street rally takes Monday pause - 02:11
U.S. Morning Call: Stock futures signal a continuing drop
U.S. Morning Call: Stock futures signal a continuing drop - 02:36
Greek optimism despite recession
Greek optimism despite recession - 01:08

Caffeine exposure leaves bees buzzing

Tuesday, November 17, 2015 - 01:46

Plants are tricking honey bees into pollinating their flowers by producing caffeine, successfully fooling the flying insects into repeatedly returning, even if their nectar is of poor quality. Jim Drury reports.

▲ Hide Transcript

▶ View Transcript

Many of us need a strong coffee in the morning to get going.....it seems the humble honey bee also finds caffeine compelling. University of Sussex researchers believe plants produce caffeine in their nectar to fool bees into thinking it contains more sugar than it does. The insects will repeatedly visit those flowers, helping the plants maximise pollination. Two false flowers were set up - both containing sucrose and water, but one with caffeine as well. ID numbers were glued on to those bees exposed to caffeine. The bees were then sent back to the hive. SOUNDBITE (English) FRANCIS RATNIEKS, PROFESSOR OF APICULTURE AT THE UNIVERSITY OF SUSSEX, SAYING: "What we found was that caffeine would have the effect of more sugar.....and the one that did have caffeine attracted more bees, but in particular the bees who were foraging made more dances, about four times as many dances." The bees' waggle dance influences the behaviour of others in the hive. Many bees were directed to revisit sites where caffeinated nectar was previously found, even after the feeder ran dry. The team thinks plants may be lacing their nectar so they can pass off sub-standard forage. SOUNDBITE (English) FRANCIS RATNIEKS, PROFESSOR OF APICULTURE AT THE UNIVERSITY OF SUSSEX, SAYING: "What the caffeine is doing is the plant manipulating the bee in a way that is good for the plant, but not so good for the bee because the bee is kind of being tricked into thinking that the nectar is of a higher quality - that is it has more sugar than it really does." It's a reminder that, although mutually dependent, the interests of plants and pollinators can conflict. By giving the honey bees a caffeine buzz, it seems that plants are leading them a merry dance.

Press CTRL+C (Windows), CMD+C (Mac), or long-press the URL below on your mobile device to copy the code

Close

Caffeine exposure leaves bees buzzing

Tuesday, November 17, 2015 - 01:46