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Questions and Answers
Which of the following is a definition of plant growth?
What are the stages of plant development?
What are the types of phytohormones?
Which hormone promotes cell division and differentiation in plants?
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Which hormone is responsible for promoting shoot and bud development in plants?
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Which hormone is responsible for initiating the ripening of fruits in plants?
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Which hormone regulates the adaptation to drought in plants?
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Which of the following is the natural auxin?
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What is the effect of auxin called when the shoot grows towards light?
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What is the process of cells developing different forms adapted to specific functions called?
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What is the ability of an individual cell to reconstitute the entire plant part and functions called?
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Which of the following is NOT a physical defense mechanism that plants use against herbivores?
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What is the purpose of PAMP recognition in plants?
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What is the main function of effector triggered immunity in plants?
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What is the difference between PAMP-triggered defense and effector-triggered defense?
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Study Notes
Plant Growth and Development
- Plant growth is the irreversible increase in size of a plant, resulting from cell division and expansion.
- The stages of plant development include:
- Seed germination
- Seedling establishment
- Vegetative growth
- Reproductive growth
- Senescence
Phytohormones
- Phytohormones are plant hormones that regulate plant growth and development.
- Types of phytohormones include:
- Auxins
- Gibberellins
- Cytokinins
- Ethylene
- Abscisic acid
Functions of Phytohormones
- Auxins promote cell division and differentiation in plants.
- Auxins are responsible for promoting shoot and bud development in plants.
- Ethylene is responsible for initiating the ripening of fruits in plants.
- Abscisic acid regulates the adaptation to drought in plants.
Auxin
- Indole-3-acetic acid (IAA) is the natural auxin.
- The effect of auxin when the shoot grows towards light is called phototropism.
Cellular Development
- The process of cells developing different forms adapted to specific functions is called cellular differentiation.
- The ability of an individual cell to reconstitute the entire plant part and functions is called totipotency.
Plant Defense Mechanisms
- Physical defense mechanisms that plants use against herbivores include:
- Spines
- Thorns
- Hairs
- Trichomes
- The exception is: Rhizome (Rhizome is a type of underground stem, not a defense mechanism)
- PAMP recognition in plants is the ability to recognize and respond to pathogen-associated molecular patterns (PAMPs).
- The purpose of PAMP recognition is to trigger an immune response against pathogens.
Plant Immunity
- The main function of effector-triggered immunity in plants is to provide specific resistance to pathogens.
- The difference between PAMP-triggered defense and effector-triggered defense is:
- PAMP-triggered defense is a general defense response against pathogens.
- Effector-triggered defense is a specific defense response against particular pathogens.
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Description
Test Your Knowledge on Plant Growth Regulators and Seed Dormancy
