Question

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Question : Explain all types of growth dependent movements or tropic movements in plants.


a). Geotropic movements
b). Photo tropic movements
c). Hydrotropic movements
d). chemotropic movements





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Answer 1

Answer:

These can be classified again into 5 types. They are:

Phototropism (light)

Geotropism (gravity)

Hydrotropism (water )

Chemotropism (chemicals)

Thigmotropism (touch)

Phototropism – It is the movement of plants in response to light. The shoot system of a plant exhibits this characteristic. The shoot moves towards the light.

Geotropism – It is the movement of a plant part towards the soil. This is a characteristic of the root system. The roots always move in the direction of the earth’s gravity.

Hydrotropism– It is the movement of a plant towards the water. The stimulus here is water.

Chemotropism – It is the movement of plants in response to a chemical stimulus. A classic example of this type of movement is the growth of the pollen tube towards the ovule, during fertilization, in a flower.

Thigmotropism – It is a directional movement in plants in response to touch. For e.g. the plant tendrils climb around any support which they touch.

Explanation:

please mark as BRAINLIST

Answer 2

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GEOTROPIC MOVEMENTS

•These types of movements are termed under directional growth, Geotropic movement means movement towards the earth.

For example - The movement of roots show positive geotropism whereas the movement of shoot shows negative geotropism.

PHOTOTROPIC MOVEMENT

•The movement(growth) towards the sun's light is known as photo tropic movement(It can be some other source of light as well).

For example - Some plants like sunflower shows movement and growth in direction of sunlight.

HYDROTROPIC MOVEMENT

• The movement(growth) towards the water is known as hydrotropic movement.

For example - Roots shows positive hydrotropism.Or you can also understand by the fact that roots always bends in direction of water.

CHEMOTROPIC MOVEMENT

• The movement in the direction of chemicals is known as chemotropic movement.

For example - The movement and growth of pollen tube towards the ovary to fuse with the egg for fertilization.