Asian Pitcher Plants Observed Using a Clever Trick to Lure Insect Prey Despite Absence of a Brain
ByScientists have found evidence of intelligence in an insect-eating plant in Borneo that apparently has nothing with the semblance of a brain.
According to Reuters, authors of a study published in the journal Proceedings of the Royal Society B said this Asian Pitcher Plant is wired to use changes in the weather to cause its prey to slip down into its trap mechanism. Getting its name for looking like a pitcher of water, the plant's rim can get slippery on its own to cause ants to fall victim.
"Of course a plant is not clever in the human sense - it cannot plot," study lead author Ulrike Bauer, a biologist at the University of Bristol, told Reuters. "However, natural selection is very relentless and will only reward the most successful strategies."
But the plant lures its victims by remaining dry during sun-filled, warm days attracting appointed scouts to gather information about the nectar the plant has. The plant may not consciously turn on its trap, but the concept is clever in allowing a few ants to go free in the hope of trapping many when they return.
"The plant's key trapping surface is extremely slippery when wet but not when dry. For up to eight hours during dry days, these traps are 'switched off' and do not capture any of their insect visitors. At first sight, this is puzzling because natural selection should favor traps that catch as many insects as possible," Bauer said in a press release. "By 'switching off' their traps for part of the day, pitcher plants ensure that scout ants can return safely to the colony and recruit nest-mates to the trap. Later, when the pitcher becomes wet, these followers get caught in one sweep. What looks like a disadvantage at first sight, turns out to be a clever strategy to exploit the recruitment behavior of social insects."