Scientists unravel mystery of Venus flytrap's rapid closure

The Venus flytrap's ability to snap shut on unsuspecting insects in a fraction of a second has long puzzled scientists. Researchers have now identified a key mechanism: the plant can rapidly relax the cell walls of its outer cell layer. This allows the trap to spring shut quickly, a process far faster than typical plant growth. The discovery, published in the journal Science, offers new insights into the biomechanics of this carnivorous plant. Scientists at Aix-Marseille University led the research, using 3D camera setups to observe the plant's actions. They ruled out theories involving water transport between cells, as this process is too slow to explain the trap's speed. The rapid relaxation of cell walls is a novel finding, distinct from the slower processes usually associated with plant movement. This mechanism helps the Venus flytrap avoid wasting energy on non-prey items like pebbles or sand. The plant requires multiple triggers, such as two successive touches of its sensitive hairs, before closing. It only begins digestion when the trapped insect struggles, triggering more hairs and confirming a successful catch. This sophisticated system has intrigued biologists since Charles Darwin's time, who marveled at the plant's speed and efficiency.