Podcast
Questions and Answers
What is the primary function of auxins in plants?
What is the primary function of auxins in plants?
- They promote plant growth. (correct)
- They enhance leaf abscission.
- They decrease flowering rates.
- They inhibit root growth.
In which of the following applications are auxins NOT typically used?
In which of the following applications are auxins NOT typically used?
- Initiating rooting in stem cuttings.
- Promoting flowering in pineapples.
- Preventing premature leaf drop.
- Stimulating excessive fruit drop. (correct)
What effect does the removal of the apical bud have on lateral buds?
What effect does the removal of the apical bud have on lateral buds?
- It stimulates lateral bud development. (correct)
- It prevents lateral bud growth.
- It initiates flowering in lateral buds.
- It causes lateral buds to wilt.
Which of the following auxins is a synthetic compound?
Which of the following auxins is a synthetic compound?
Apical dominance primarily affects which part of the plant?
Apical dominance primarily affects which part of the plant?
Which statement correctly describes the role of auxins in plant growth?
Which statement correctly describes the role of auxins in plant growth?
What is the primary source of auxins in higher plants?
What is the primary source of auxins in higher plants?
Which of the following characteristics is NOT associated with auxins?
Which of the following characteristics is NOT associated with auxins?
How does the removal of the apical bud affect the lateral buds?
How does the removal of the apical bud affect the lateral buds?
Which auxin is representative of a synthetic compound used in horticulture?
Which auxin is representative of a synthetic compound used in horticulture?
In what way do auxins contribute to preventing premature fruit drop?
In what way do auxins contribute to preventing premature fruit drop?
What phenomenon describes the inhibition of lateral bud growth by the apical bud?
What phenomenon describes the inhibition of lateral bud growth by the apical bud?
Which of the following is a common application of auxins in agriculture?
Which of the following is a common application of auxins in agriculture?
Flashcards
Auxin function
Auxin function
Auxins promote plant growth and are involved in various agricultural and horticultural applications.
Apical dominance
Apical dominance
The main stem inhibiting the growth of side stems, a common growth pattern in plants.
Auxin example
Auxin example
Indole-3-acetic acid (IAA) is a common auxin.
Auxin application
Auxin application
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Apical Dominance removal
Apical Dominance removal
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What are auxins?
What are auxins?
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What is IAA?
What is IAA?
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What are some other examples of auxins?
What are some other examples of auxins?
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How are auxins used in agriculture?
How are auxins used in agriculture?
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What is apical dominance?
What is apical dominance?
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How does removing the apical bud affect lateral buds?
How does removing the apical bud affect lateral buds?
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What is the benefit of removing the apical bud?
What is the benefit of removing the apical bud?
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Why does apical dominance occur?
Why does apical dominance occur?
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Study Notes
Plant Growth Regulators - Auxins
- Auxins are plant hormones, derived from the Greek word "auxein" meaning "to grow".
- Indole-3-acetic acid (IAA) is a naturally occurring auxin, used in plant growth regulation.
- Other natural and synthetic compounds are also classified as auxins.
- Auxins are primarily produced in stem and root tips.
- They migrate to other areas of the plant to exert their effects.
- Indole butyric acid (IBA) is an example of a naturally occurring auxin.
- Synthetic auxins include naphthalene acetic acid (NAA) and 2,4-D (2,4-dichlorophenoxyacetic acid).
- Auxins are widely used in agriculture and horticulture.
- They are used to initiate root development in stem cuttings.
- Applications include promoting flowering in pineapples.
- Preventing premature fruit and leaf drop.
- Promoting the abscission (falling off) of older leaves and fruits.
Plant Growth Regulators - Apical Dominance
- Apical dominance is a phenomenon where the main stem/bud inhibits the growth of side buds/branches.
- Removal of the apical bud (decapitation) can lead to the growth of lateral/side buds.
- This process is frequently used in horticulture (e.g., tea plantations, hedge-making).
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