Thigmotropism (Gr. Tigma - Touch, Trope - Turn)

Thigmotropism (from the Greek words "tigma" - touch and "trope" - turn) is a change in the orientation of the body in response to touch. This phenomenon is widespread in the plant kingdom and can be observed in many plants, including trees, shrubs, grasses and other plants.

Thigmotropism is one of many types of movement, also called tactile movements, which are the body's responses to various forms of stimulation. In the case of thigmotropism, the stimulus is a touch or light mechanical stimulus that causes a change in the orientation of the organism.

In many plants, thigmotropism is an important mechanism that allows them to respond to changing environmental conditions. For example, when a tree leaf touches a nearby plant or other object, it can change its orientation to make the most of available light and resources. In some cases, thigmotropism can also help the plant protect itself from pests or avoid damage from animals that might try to eat it.

The mechanism of thigmotropism in plants is associated with a change in the direction of movement of a stimulus within the body. When touched or otherwise mechanically stimulated, the plant produces special chemicals that cause a change in the direction of movement within the cells. This, in turn, leads to a change in the shape and direction of cell growth, which leads to a change in the orientation of the organism as a whole.

In conclusion, thigmotropism is an important phenomenon in the plant kingdom that allows plants to adapt to changing environmental conditions. The mechanism of thigmotropism is associated with a change in the direction of movement of a stimulus within plant cells and can lead to significant changes in the orientation and shape of the plant.