Venus flytrap

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News: Scientists have now found the physical mechanism ‌behind the snapping action of the Venus flytrap. 

About Venus flytrap

Venus flytrap
Source: Britannica
  • The Venus flytrap is a small carnivorous ​plant of the sundew family (Droseraceae).
  • Scientific name: Its scientific name is Dionaea muscipula.
  • Native to: It is native to a limited region of North Carolina and South Carolina in U.S.A. 
  • It grows in nutrient-poor environments and supplements its nutrition by capturing ​and digesting insects using snap trap mechanism. 
  • How the snapping mechanism works:
    • The plant uses specialised trigger hairs located on the inner surface of the trap. 
    • When an insect touches these hairs twice within a short period of time, the trap closes.
    • Closure can occur in as little as one-tenth of a second. 
    • When the trap snaps shut, the insect is sealed inside for digestion.
    • After the plant absorbs the nutrient-rich liquid produced by the digestive processes, the trap ​reopens, with the insect’s empty exoskeleton left behind.
  • Findings of the new study
    • The researchers found that the trap closes because the cell walls on the outer surface of the trap suddenly become softer and more flexible (about 30–40% softer).
    • The trap is already under tension, like a compressed spring.
    • When an insect touches the trigger hairs twice, the cell walls soften, releasing the stored tension and causing the trap to snap shut in as little as 0.1 seconds.
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