How does chemical coordination occurs in plant? Explain with the help of three example?

Question

Answer

Answer

Control and coordination

in

plants

is performed by chemical substances known as

plant

hormones or phytohormones. The synthesis and action of phytohormones are greatly influenced by external stimuli.

Plants

respond to photoperiodic stimulus by specialized pigment present in very small quantity called phytochrome.

For example, auxins and gibberellins. Gibberellins help in growth of the stem. Abscisic acid, another plant hormone, inhibits growth in plants.

Answer

Coordination in plants means the ability to use different parts of the plant together which is smooth and efficient. This coordination in plants is possible due to the major role played by the plant hormones.

There are four different types of plant hormones that are responsible for control and coordination in plants and they are:

Auxins
Gibberellins
Cytokiins
Abscisic acid
Also, these hormones are responsible for growth of plants in three different stages:

Cell division
Cell enlargement
Cell differentiation
Chemical coordination occurs in plants with the help of fluids secreted in plants known as phytohormones or plant hormones. These hormones regulate the growth of the plants. For example auxin is responsible for the growth of the plants and cytokinin helps in cell division in the fast growing part of the plant such as plant hormones.

Answer

Answer

Plant hormones bring about chemical coordination in plants. They are synthesized away from the site of their action and then are diffused there.

Different plants hormones are responsible for growth, development and tropic responses. For example, auxin, cytokinins and gibberellins are growth hormones, ethylene is fruit ripening hormone while abscisic acid is growth inhibitory hormone

Answer

Explanation:Chemical coordination occurs in plants with the help of fluids secreted in plants known as phytohormones or plant hormones. ... For example auxin is responsible for the growth of the plants and cytokinin helps in cell division in the fast growing part of the plant such as plant hormones.

Answer

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Answer

Chemical coordination occurs in plant with plant hormones. Plant hormones are synthesized at places away from where they act and diffuse to the area of action. Different plant hormones help to coordinate growth and development

*For example, auxins and gibberellins. Gibberellins help in growth of the stem. Abscisic acid, another plant hormone, inhibits growth in plant

Answer

Chemical coordination occurs in plants with the help of fluids secreted in plants known as plant hormones or phytohormones.

For example,

1. Auxins are responsible for the growth of the plant. They also promote cell enlargement and cell differentiation.

2. Gibberellins promote cell enlargement and cell differentiation in the presence of auxin. It also help in breaking the dormancy in seeds and buds. It promote the growth in fruits.

3. Cytokinins help in cell division. It delays the ageing in leaves. It promotes the opening of stomata.

4. Abscisic acid promotes the dormancy in seeds and buds. It promotes the closing of stomata and falling of leaves. It inhibits growth, and reverses the growth promoting effects of auxins and gibberellins. It's effects include wilting of leaves.

5. Ethylene promotes the falling of leaves, ripening of fruits, and helps in breaking bud dormancy.

Answer

Chemical Coordination in Plants

Chemical coordination in plants refers to the control and regulation of various physiological processes through the production and transport of chemical substances known as plant hormones or phytohormones. These hormones play a crucial role in coordinating growth, development, and response to environmental stimuli in plants. Here are three examples of how chemical coordination occurs in plants:

1. Abscisic Acid (ABA) and Seed Dormancy:
- Abscisic acid is a plant hormone that regulates seed dormancy, preventing premature germination under unfavorable conditions.
- ABA is synthesized in mature seeds and inhibits the production of enzymes necessary for germination.
- When environmental conditions are favorable, such as adequate moisture and temperature, the levels of ABA decrease, allowing germination to occur.

2. Auxins and Apical Dominance:
- Auxins are plant hormones responsible for various growth processes, including apical dominance.
- Apical dominance refers to the inhibition of lateral bud growth by the apical bud.
- The apical bud produces high levels of auxins, which move downward and inhibit the growth of lateral buds.
- This ensures that the plant's energy is primarily directed towards upward growth rather than lateral branching.

3. Ethylene and Fruit Ripening:
- Ethylene is a gaseous plant hormone that regulates fruit ripening.
- It is produced in high concentrations during ripening and promotes various physiological and biochemical changes in the fruit.
- These changes include softening, color development, and the production of aroma compounds.
- Ethylene also accelerates the ripening process in nearby fruits, leading to synchronized ripening in a cluster or bunch of fruits.

Overall, chemical coordination in plants involves the production, transport, and response to various plant hormones, which regulate important processes such as seed dormancy, growth, and development, as well as responses to environmental stimuli. These hormones enable plants to adapt and survive in their surroundings, ensuring optimal growth and reproduction.

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