What are plant hormones ?

Question

Answer

Plant hormones, also known as phytohormones, are chemicals that regulate plant cell processes. They are signal molecules produced within the plant functioning in extremely low concentrations.

Answer

The hormones present in plants for control and coordination of the plant are called plant hormone or phyto hormones. These hormones are also known as growth regulators. There are 4 types of hormones in which 3 are growth regulators:-
i.. auxins,
ii.. gibberlins and
iii.. cytokinins.

and 1 hormone is called growth inhabitators i.e. they oppose the growth of plants after a particular period of time which is:-
i.. ABA( abscisis acid)

Thank you.. :-)

Answer

Look frnd...

To control n coordinate activities of different parts as well as to provide appropriate response to both internal and external stimuli there is a nervous system in animals.....

bt in case of plants nervous system is nt present...

so In order to participate in molecular reaction... enzyme action transportation of water and minerals....for cell division.... abscission..for growth n development...

.. there must be something similar to nervous system...for coordination...

so that is fulfilled by plant hormones..or phytohormones...

hope this is clear to uh...!

Answer

Answer

Plant hormones are signal molecules produced within plants, that occur in extremely low concentrations. ..

Answer

Auxin,Gibberelin,Cytokinin,and Absasic Acid..

Answer

Hormones produced by plants that control or regulate germination , growth , metabolism and other pshycological activities. Auxins, Cytokinins, Gibberellins, and Abscisic acid are some plant hormone..

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Plant hormones are signal molecules produced within plants, that occur in extremely low concentrations. Plant hormones control all aspects of growth and development, from embryogenesis, the regulation of organ size, pathogen defense, stress tolerance and through to reproductive development.

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Those hormones that help in the growth and development of plants are called plant hormones.
plant hormones are:
1) auxins= it is the plant hormone that help In the cell enlargement and cell differentiation in plants. it also helps in the growth of fruits. this hormone also responsible for phototropism or geo-tropism.
2) giberelins= it's function same as auxins but it functions only In thE presEncE of AuxiNs. it also helps in breaking of dormancy of plant.
3) cyTokiniNs= it's function is to Promote cell differentiation in plants. it also helps in opening of stomata.
4) Absisic acid = it is the only plant hormone that oppose the growth of plant it promotes the closing of stomata.

Answer

Hello kumkum,

Plant hormones are known as phytohormonesin botanical terms. They are chemicals just like animal hormones that help in the growth, development, and functioning of plants. Like animals, plants too are living organisms that function as a unit. They carry out vital biochemical reactions that are required to survive. These biochemical reactions require hormones also known as 'plant growth substances'. These hormones help in the formation of leaves, flowers, stems, fruit, etc. They also help in determining the sex of the flowers, the color of the fruits, and leaves. They help in formation of tissues, respiration, energy production, and even plant longevity and death. Just as hormones are necessary for an animal body to function without any glitches, they too help the green living beings to survive normally. In this article, we shall cover some information related to these secretions and their functions.

Thanks for asking the question, keep learning :)

Answer

Plant hormones are signal molecules produced within plants, that occur in extremely low concentrations. Plant hormones control all aspects of growth and development, from embryogenesis, the regulation of organ size, pathogen defense, stress tolerance and through to reproductive development.

Answer

These are the chemical substances which are responsible for growth of plant.

Answer

Plant hormones are Chemical organic substances synthesized in plants that bring about control and coordination.
Ex :- auxin, gibberellin, cytokinins, ethylene and abscisic acid.

Answer

Organic compounds produced by plants that are capable of influencing the physiographical activities leading to the promotion,inhibition and modification of growth are known as Plant hormones.

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Plant hormones are the chemical substances released by the actively dividing parts of plants such as root tip ,shoot tip germinating seed embryo etc which control and coordinate various physiological and biological activities in plants.
they are of two types
1.growth promoter
2.growth inhibitor

Answer

Plant hormone is a fluid which is secreted within the plant.

Answer

Plant hormones:

Plant hormones, also known as phytohormones, are chemical substances produced by plants that regulate various physiological processes. These hormones play a crucial role in growth, development, and responses to environmental stimuli. They are synthesized in one part of the plant and then transported to target cells or tissues to elicit specific responses.

Types of plant hormones:
There are five major types of plant hormones, each with distinct functions:

1. Auxins:
- Auxins are primarily responsible for cell elongation and apical dominance, which is the inhibition of lateral bud growth.
- They promote the development of roots, control phototropism (response to light), and regulate fruit development.
- The most well-known auxin is indole-3-acetic acid (IAA).

2. Gibberellins:
- Gibberellins are involved in stem elongation, seed germination, and flowering.
- They stimulate cell division and elongation, induce bolting (rapid growth of floral stems), and promote fruit growth.
- Gibberellic acid (GA3) is a commonly used gibberellin.

3. Cytokinins:
- Cytokinins regulate cell division and differentiation, promoting the growth of lateral buds and preventing senescence (aging) in leaves.
- They are involved in apical dominance release, root growth, and the development of chloroplasts.
- The most common cytokinin is zeatin.

4. Abscisic acid (ABA):
- ABA is responsible for stress responses, such as drought tolerance, seed dormancy, and stomatal closure.
- It inhibits growth, promotes leaf senescence, and regulates seed development and dormancy.
- ABA helps plants adapt to unfavorable conditions by conserving water and energy.

5. Ethylene:
- Ethylene is a gaseous hormone involved in fruit ripening, leaf and flower senescence, and responses to mechanical stress.
- It promotes fruit ripening by triggering the production of enzymes that break down cell walls.
- Ethylene also influences the response to pathogens and stimulates the formation of adventitious roots.

Functions of plant hormones:
- Plant hormones regulate various processes, including growth, development, and responses to environmental cues.
- They control cell division, elongation, and differentiation during plant growth.
- Hormones coordinate the development of roots, shoots, leaves, flowers, and fruits.
- They affect seed germination, dormancy, and flowering time.
- Plant hormones play a crucial role in responses to light, gravity, touch, and other environmental stimuli.
- They regulate nutrient uptake, water balance, and stress tolerance.

In conclusion, plant hormones are essential chemical messengers that orchestrate the growth, development, and responses of plants. They work together to ensure proper plant functioning and adaptation to changing environments.

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