Geotropism (Gr. Gea - Earth, Tropos - Turn)

Geotropism (from the Greek "Gea" - Earth and "Tropos" - Rotation) is the property of plants to grow in the direction of gravity. Plants exhibit different forms of geotropism depending on whether they grow up or down.

When growing upward, geotropism is called negative, and when growing downward, it is called positive. Negative geotropism occurs when the stem of a plant grows upward, against the direction of gravity. In this case, the stem is in a constant state of tension until it reaches the highest point of its growth, where it is free to unfold and begin mature growth.

Positive geotropism occurs when a plant's roots grow downward, in the direction of gravity. This property allows the roots to stay in the soil and receive the necessary nutrients and water.

Geotropism is an important aspect of plant growth as it ensures optimal distribution of nutrients throughout the plant. Without geotropism, plants will not be able to develop normally and will be susceptible to various diseases.

In addition, geotropism plays an important role in the life cycle of plants. For example, the bracts of some plants, such as beans, curl around a support to support the plant and provide it with access to light.

Thus, geotropism is an important factor that affects plant life. It ensures optimal growth and development of plants and also helps them adapt to different environmental conditions.