Definition of Tropism in Plants and Kinds

Definition of Tropism in Plants and Kinds - Plants we often do not realize can move. Like other living things, plants can also choose how they move.

Definition of Tropism in Plants and Kinds

There are several movements in plants, one of which is the movement of tropism. Tropism in plants can be explained as follows:

Definition of Tropism

The definition of motion tropism is a movement in plants that move with the influence of the direction of the stimulus that is obtained. This movement has two movements, namely positive tropism and negative tropism.

Positive tropism is the movement of plants in which the direction of motion approaches and approaches the source of the stimulus. Negative tropism is the movement of plants in the direction of motion away from the source of the stimulus.

Types of Tropism

This movement is divided into several types. To get to know the various types, it will be explained as follows:

1. Geotropism

Geotropism is a movement of tropism that occurs due to stimulation from Earth's gravity. Gravity received by plants from the earth as it is today shows the growth of geotropism. The growth of geotropism is received both positive and negative sides.

This positive geotropism movement can be seen in plant roots that penetrate the soil downwards. Negative geotropism movement can be seen when looking at the growth of plant stems that rise upwards.

2. Phototropism

Phototropism is a movement of tropism that occurs due to stimulation from light. The upper part of the plant that is often exposed to sunlight has a positive phototropism effect.

While the roots of these plants that are not exposed to light have a negative phototropism effect. However, even though it has a negative phototropism impact, the roots of the plants grow quickly due to the distribution of auxin that descends from the tree trunk down to the roots.

3. Thigmotropism

Thigmotropism is a tropism movement that occurs due to tactile stimulation. This movement occurs in some plants such as sweet potatoes, grapes and other types of climbing plants.

The elongated tendrils hit the touched object and have a growth effect on plant cells The part that is touched becomes slower and shorter compared to the part that is not affected touch. And as a result of the touch, the part will curve following the object that touches it.

4. Chemotropism

Chemotropism is a tropism movement that occurs due to chemical stimuli. This stimulus is present when root movement becomes accumulated and when the growth of pollen ducts that will go to the ovary when multiplying fertilization.

5. Hydrotropism

Hydrotropism is a movement of tropism that occurs due to stimulation from water. This stimulation will cause plant parts to approach the water like roots moving to approach water.

That's the explanation about Definition of Tropism in Plants and Kinds which has been explained about knowledge. Plants that move in tropism have many kinds that have been separated and differentiated according to the type of stimulus they receive and the impact is different. Hope it's useful

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