Overview
- A paper published June 11 in Science reports that the Venus flytrap initiates its sub-second snap by rapidly softening the cell walls of the outer epidermis, which releases pre-stored elastic stress and lets the lobes flip shut.
- The team used high-speed imaging, tiny mechanical probes, tissue slicing and water injections to separate geometry, timing and material changes and to test competing ideas about closure.
- Direct measurements showed water redistribution across the trap takes about 30–60 seconds, making simple hydraulic swelling too slow to explain the observed sub-second movement under the tested conditions.
- The study leaves the molecular trigger for the fast cell-wall softening unresolved and several plant physiologists have questioned whether other fast water-transport modes or multi-step mechanisms were fully excluded.
- Beyond settling a long-standing mechanical question, the result suggests a muscle-free actuation principle that could inspire soft robotics and smart materials while also renewing interest in the flytrap’s biology and conservation.