Physicists Decode the Venus Flytrap’s Lightning-Fast Snap
June 15, 8:00 PM
Physicists have explained how the Venus flytrap manages to snap shut in just 0.2 seconds. Earlier theories suggested a hydraulic mechanism, but new research from the French National Centre for Scientific Research (CNRS) reveals that moisture transport actually takes between 30 and 150 seconds. Instead, scientists identified a two-step closing process: the trap actively bends until it reaches a critical tipping point, after which it snaps shut abruptly.
Findings and Experimental Insights
Experiments showed that the movements initiating the closure take about one second, while the actual trap closure lasts only 0.2 seconds. Researchers sliced the traps into thin strips and held them open with a force sensor, allowing them to examine the underlying mechanisms.
- Measurements of cell wall stiffness revealed that the inner walls remained nearly unchanged.
- Outer walls, however, lost roughly 40% of their stiffness, which triggers the rapid closure.
The experiment’s authors noted that 'this is the fastest modulation of wall mechanics ever recorded in plants.'
They also emphasized that 'our experiment reveals a mode of plant motility driven by dynamic tuning of material properties, offering principles for muscle-free, bioinspired actuation.' The findings were published in the journal Science, underscoring their significance for understanding movement mechanisms in plants.
These results could have major implications for biomimicry and the development of new materials that respond to mechanical changes. Studying plant mechanisms may inspire innovations in engineering, particularly in creating adaptive structures and devices. As plant science advances, such discoveries can broaden our understanding of biological processes and their technological applications.