What is geotropism?

Question

What is geotropism?

Answer

Geotropism is the directional movement in response to gravity. The roots of the plants always grow downwards in response to gravity. And the stems of the plants grow upwards, away from the pull of gravity. ... So it is a positive Geotropism. . Nd now keep the potted plant in a horizontal position.

Answer

Geotropism is the response given by plants by showing it's growth towards gravity

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The unindirectional movement of plant in response to gravity is called geotropism .

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The growth of parts of plants in respons to the force of gravity. the upword growth of plant shoots is an instance  of negative geotropism., the downword growth of roots is positive geotropism.

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The growth of shoots and roots upward and downward direction respectively in response to the pull of earth or gravity is geotropism .

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The growth of the shoot or root in response to gravity is called geotropism

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Plant's response towards GRAVITY...

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Geotropism is the response by plant in which stimuli is gravity

Answer

Geotropism, also known as gravitropism, is a plant's ability to respond to the force of gravity by growing or moving in a particular direction. It plays a critical role in plant growth and development, allowing plants to adapt and orient themselves correctly in relation to gravity. Geotropism can be either positive or negative, depending on the direction of the plant's growth in response to gravity.

The Mechanism of Geotropism:

The mechanism behind geotropism involves specialized cells called statocytes, which are found in the root cap of plant roots and in the shoot apex of plant stems. These cells contain specialized organelles called statoliths, which are dense starch grains or crystals that settle under the influence of gravity. When a plant is placed horizontally, the statoliths in the statocytes settle at the bottom of the cell due to gravity. This displacement stimulates the release of auxin, a plant hormone that regulates growth and development.

Root Geotropism:

- Positive root geotropism: In response to gravity, the auxin accumulates on the lower side of a horizontally placed root. This accumulation of auxin inhibits cell elongation on the lower side, causing the root to bend downwards towards gravity.
- Negative root geotropism: In some plants, such as floating aquatic plants, the roots display negative geotropism and grow upwards, away from the force of gravity.

Shoot Geotropism:

- Positive shoot geotropism: The shoot apex of a plant displays positive geotropism, growing upwards against the force of gravity. Auxin accumulates on the lower side of the shoot apex, stimulating cell elongation and causing the shoot to grow upwards.
- Negative shoot geotropism: In some cases, such as the growth of tendrils in climbing plants, the shoots display negative geotropism and grow away from gravity. This allows them to reach for support structures and climb upwards.

Importance of Geotropism:

- Anchorage: Positive geotropism in roots ensures that they grow downwards into the soil, providing stability and anchorage for the plant.
- Nutrient uptake: The downward growth of roots maximizes their contact with the soil, allowing for efficient absorption of water and nutrients.
- Phototropism coordination: Geotropism works in conjunction with phototropism (the growth response to light) to ensure that plants grow in the appropriate direction. Roots grow downwards, while shoots grow upwards towards the light source.
- Survival and adaptation: Geotropism helps plants adapt to their environment by allowing them to respond to gravity and position themselves optimally for growth and survival.

In conclusion, geotropism is a fundamental mechanism in plants that enables them to respond to gravity and orient their growth accordingly. This response is crucial for the proper development, anchorage, and adaptation of plants in their environment.

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