Plant hormones

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  • Created by: Thabisa18
  • Created on: 03-07-23 10:44
What are plant hormones?
Plant hormones, also known as phytohormones or plant growth regulators, are naturally occurring chemical substances that regulate various physiological processes in plants.
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How are plant hormones produced and transported?
Plant hormones are produced in specific plant tissues or organs and are transported to target sites within the plant.
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What are the functions of plant hormones?
Plant hormones regulate growth, development, and responses to environmental stimuli. They control processes such as cell division, cell elongation, differentiation, flowering, fruit ripening, ageing, and responses to light, gravity, and stress.
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Name three important plant hormones.
The three important plant hormones are auxins, gibberellins, and abscisic acid.
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What are the functions of auxins?
Auxins regulate cell elongation, cell division, and differentiation. They also promote apical dominance and control tropic responses, such as phototropism and gravitropism.
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What are the functions of gibberellins?
Gibberellins promote stem elongation, seed germination, and flowering. They also regulate fruit development and break seed dormancy.
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What are the functions of abscisic acid?
Abscisic acid inhibits seed germination and regulates stomatal closure. It also plays a role in promoting dormancy and stress responses in plants.
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What is the primary role of auxins in plants?
Auxins promote the elongation of cells, causing them to become longer.
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Where do auxins originate in plants?
Auxins originate from the growing tips of both roots and shoots.
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How do auxins affect cell wall elasticity?
Auxins are responsible for maintaining cell wall elasticity in plants.
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What is the result of the presence of auxins in plants?
The presence of auxins leads to an increased length of roots and shoots, contributing to the overall growth of the plant.
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Do auxins have consistent effects throughout all parts of a plant and across different plant species?
No, the effects of auxins can vary across different parts of a plant and among various plant species.
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What is the role of abscisic acid (ABA) in plants?
Abscisic acid plays a vital role in several physiological processes, particularly in response to environmental stresses and regulation of plant growth and development.
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What are the functions of abscisic acid?
Abscisic acid functions as a crucial regulator of plant responses to environmental stresses, water regulation, seed dormancy and germination, growth inhibition, and gene expression.
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How does abscisic acid help plants adapt to challenging conditions?
Abscisic acid enables plants to adapt and survive under challenging conditions by conserving water, modulating growth, and activating stress response pathways.
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What is the primary effect of gibberellins on plant growth?
Gibberellins induce both cell division and cell elongation, resulting in vertical growth of the plant, making it taller.
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Where are gibberellins primarily produced in plants?
Gibberellins are primarily produced in the young tissues of the shoot and developing seeds.
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How are gibberellins transported throughout the plant?
Gibberellins are transported throughout the plant via the xylem and phloem.
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Card 2

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How are plant hormones produced and transported?

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Plant hormones are produced in specific plant tissues or organs and are transported to target sites within the plant.

Card 3

Front

What are the functions of plant hormones?

Back

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Card 4

Front

Name three important plant hormones.

Back

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Card 5

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What are the functions of auxins?

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