A thigmonasty is when a plant senses it is in harms way and moves.
Thigmonasty.
The mimosa plant responds to touch by rapidly closing its leaves when touched, a behavior known as thigmonasty.
Yes, wood sorrel is sensitive to touch. Its leaves fold up or close in response to physical contact or changes in light intensity. This response is known as thigmonasty.
The plant you are referring to is likely the sensitive plant, also known as Mimosa pudica. It responds to touch by folding its leaves inwards, a response known as thigmonasty.
I do not think that it has a specific name for only that. I am not a plant professional but I can tell you that number one; they aren't leaves and number two; It should only be called "the head of the Venus Flytrap closing". It also does not need a capital V since it is not the name of a planet, but the name of a plant (Venus).
The response of the makahiya plant (Mimosa pudica) to stimuli is known as "thigmonasty" or "seismonasty." This phenomenon involves the rapid folding of its leaves and drooping of its stems when touched or disturbed, serving as a defense mechanism against herbivores. This reaction is a form of movement that occurs in response to physical stimuli.
A responsive movement of a plant that is not dependent on the direction of the stimulus is called a non-directional or non-tropic movement. Examples of non-directional movements in plants include thigmonasty (response to touch), nastic movements (response to changes in environmental conditions), and nyctinasty (response to changes in light).
The sensitive plant flower is intriguing due to its unique ability to fold its leaves in response to touch or movement, a phenomenon known as thigmonasty. This plant also has delicate pink flowers and fern-like leaves, making it visually appealing to both botanists and gardeners.
Flowers themselves do not move in the way animals do, but they can exhibit movements such as opening and closing in response to light, a phenomenon known as phototropism. Some flowers may also respond to touch or temperature changes, a process referred to as thigmonasty. Additionally, certain plants can attract pollinators through movements like swaying or changing positions, which aids in reproduction. Overall, while flowers are generally stationary, they can demonstrate various types of movement based on environmental stimuli.
Nastic response occur in a part of a plant that grows towards a non-directional stimulus while Tropic response occur in a part of a plant that grows towards or away from a directional stimulus.
The exact mechanism for this phenomena is still widly unknown. What we do know is that the "mouth" on the plant has little "sensor hairs" that somehow sends a signal that initiates the closing of the trap. The actual closing of the trap is probably a result of a change in turgor pressure within the trap, itself. In other words, the water in the plant is redistributed to fill the trap.
Venus fly trap and the sundew plant (both carnivorous) respond to the touch of their prey. Mimosa pudica (called sensitive plant, touch-me-not, shy plant or tickleme plant) also responds to touch. The cells in the leaf quickly shed water, lose their rigidity and let the leaf droop away from the touch. After a few minutes the leaf returns to normal.