Venus Flytrap's Snap: Cell Walls Soften to Trap Prey

Researchers have identified the precise physical mechanism enabling the Venus flytrap to snap shut. For over a century, scientists believed water redistribution was responsible. However, recent experiments reveal that the trap's rapid closure, which can occur in as little as one-tenth of a second, is driven by a swift softening of the cell walls in the trap's outer layer. This softening releases stored internal stresses, causing the trap to bend and close.

The findings, published recently in the journal Science, challenge long-held hypotheses. The Venus flytrap, native to the Carolinas in the United States, supplements its nutrient-poor diet by capturing insects. This new understanding of its mechanics, which involves actively tuning material stiffness, could inspire future developments in soft robotics and smart materials.