Podcast
Questions and Answers
What is the primary function of the root cap?
What is the primary function of the root cap?
The primary function of the root cap is to protect the growing tip of the root as it pushes through the soil, and to secrete mucilage to reduce friction.
In which root region are cells actively dividing to increase root length?
In which root region are cells actively dividing to increase root length?
The meristematic region is where active cell division occurs to increase root length.
What role does the zone of elongation play in root growth?
What role does the zone of elongation play in root growth?
The zone of elongation is where cells elongate to increase root length and help the root penetrate deeper into the soil.
What is the significance of root hairs that develop in the zone of maturation?
What is the significance of root hairs that develop in the zone of maturation?
What is the main function of the cortex tissue in the root?
What is the main function of the cortex tissue in the root?
What is the purpose of the Casparian strip found in the endodermis?
What is the purpose of the Casparian strip found in the endodermis?
What is the function of the pericycle layer within the root?
What is the function of the pericycle layer within the root?
What is the difference in function between xylem and phloem within the root's vascular bundle?
What is the difference in function between xylem and phloem within the root's vascular bundle?
Flashcards
Epidermis
Epidermis
The outermost layer of the root, protecting it and absorbing water and minerals through root hairs.
Cortex
Cortex
A layer of cells inside the epidermis, storing food and transporting water and nutrients to the vascular tissue.
Endodermis
Endodermis
The innermost layer of the cortex, regulating the flow of water and nutrients into the vascular tissue with a waxy barrier.
Pericycle
Pericycle
Signup and view all the flashcards
Vascular Bundle
Vascular Bundle
Signup and view all the flashcards
Root Cap
Root Cap
Signup and view all the flashcards
Meristematic Region
Meristematic Region
Signup and view all the flashcards
Zone of Elongation
Zone of Elongation
Signup and view all the flashcards
Study Notes
Root Internal Structure
- Roots are composed of distinct layers with specialized functions
Root Cap
- Located at the tip of the root
- Protects the growing root tip
- Secretes mucilage to reduce friction
- Constantly replaces damaged cells
Meristematic Region
- Lies just behind the root cap
- Composed of actively dividing cells
- Responsible for the root's growth in length
Zone of Elongation
- Found above the meristematic region
- Responsible for cell elongation
- Facilitates deeper penetration into the soil
Zone of Maturation
- Located above the elongation zone
- Contains specialized cells
- Where root hairs develop to increase surface area for absorption
Internal Tissues
Epidermis
- The outermost layer of cells
- Protects the root
- Provides sites for root hair development for water and mineral absorption
Cortex
- Composed of parenchyma cells with large spaces amidst them
- Lies below the epidermis
- Stores food resources and facilitates the flow of water and nutrients
Endodermis
- The innermost layer of the cortex.
- Tightly packed cells with a Casparian strip
- Regulates the movement of water and solutes into the vascular cylinder
- Prevents backflow of water and solutes
Pericycle
- A thin layer of cells inside the endodermis
- Gives rise to lateral roots
- Contributes to secondary growth in woody roots
Vascular Bundle
- Consists of xylem (water transport) and phloem (nutrient transport)
- Arranged radially in roots.
- Responsible for transporting water and minerals throughout the plant as well as transporting products of photosynthesis
Root Cross-Section
- Organised arrangement of epidermis, cortex, endodermis, pericycle, and vascular bundles is visible.
Studying That Suits You
Use AI to generate personalized quizzes and flashcards to suit your learning preferences.
