Download App
Google Android
Apple iOS
Huawei
English
English
Malay
Guest
Login
Register
Home
Quiz
Battle
Practice
Class
Classes List
Timetable
Assignments
Learn
Learning Hub
Quick Notes
Videos
Experiments
Textbooks
Login
Register
Download App
Google Android
Apple iOS
Huawei
EN
MS
Learn
Quick Notes
List
Organs of Water Uptake and Mineral Salts
Organ for Water and Mineral Salts Uptake
3.2
Organ for Water and Mineral Salts Uptake
The Important of Root
Rroots are involved directly in plant growth.
Organ of mineral and water uptake in root.
There are two main functions of roots:
Provide support and strength to anchor the plant in the soil.
Absorb water and mineral salts from the soil and transport them to the stem and leaves.
The External Structure of Roots and Their Functions
Structures
Functions
Root collar
Part of the root connected to the base of the plant stem.
Root hairs
Adapted from epidermal cells of the roots.
Increases the total surface area of the roots to increase the uptake of water and mineral salts.
Root cap
Located at the tip of the root.
Protects the root from damage when going through the soil.
The Internal Structure of Roots and Their Function
Structures
Function
Epidermis
Epidermal cells are closely arranged.
Thin cell walls and water-permeable cell membranes facilitate water movement in the roots.
There are epidermal cells which form root hairs by elongating towards lateral sides from the outer walls.
Root hair cells are not layered with cuticle to allow water absorption.
The root hair cells also have big vacuoles to store water and mineral salts to increase water absorption.
Cortex
Cortex is located under the epidermal layer.
Has thin cell walls, facilitating water movement in the roots.
The cells are loosely arranged to facilitate gaseous exchange.
Most of the cortex consists of parenchyma cells.
Endodermis
Separating layer between cortex and vascular cylinder.
Endodermal cells are closely arranged and one cell thick.
Most of the endodermal cells have suberin or lignin thickening at the walls which form Casparian strips.
Endodermis allows water and mineral salts absorbed from the soil to enter the vascular cylinder, but not air bubbles.
Vascular cylinder
Vascular cylinder is the root core that consists of xylem and phloem tissues surrounded by one cell thick pericycle cell tissues.
Pericycle is involved in secondary growth and the formation of lateral roots.
Usually, xylem and phloem tissues are arranged in a star-shaped pattern.
Xylem tissue transports water and mineral salts, whereas phloem tissue transports organic substances such as sucrose and plant hormone.
Organ for Water and Mineral Salts Uptake
3.2
Organ for Water and Mineral Salts Uptake
The Important of Root
Rroots are involved directly in plant growth.
Organ of mineral and water uptake in root.
There are two main functions of roots:
Provide support and strength to anchor the plant in the soil.
Absorb water and mineral salts from the soil and transport them to the stem and leaves.
The External Structure of Roots and Their Functions
Structures
Functions
Root collar
Part of the root connected to the base of the plant stem.
Root hairs
Adapted from epidermal cells of the roots.
Increases the total surface area of the roots to increase the uptake of water and mineral salts.
Root cap
Located at the tip of the root.
Protects the root from damage when going through the soil.
The Internal Structure of Roots and Their Function
Structures
Function
Epidermis
Epidermal cells are closely arranged.
Thin cell walls and water-permeable cell membranes facilitate water movement in the roots.
There are epidermal cells which form root hairs by elongating towards lateral sides from the outer walls.
Root hair cells are not layered with cuticle to allow water absorption.
The root hair cells also have big vacuoles to store water and mineral salts to increase water absorption.
Cortex
Cortex is located under the epidermal layer.
Has thin cell walls, facilitating water movement in the roots.
The cells are loosely arranged to facilitate gaseous exchange.
Most of the cortex consists of parenchyma cells.
Endodermis
Separating layer between cortex and vascular cylinder.
Endodermal cells are closely arranged and one cell thick.
Most of the endodermal cells have suberin or lignin thickening at the walls which form Casparian strips.
Endodermis allows water and mineral salts absorbed from the soil to enter the vascular cylinder, but not air bubbles.
Vascular cylinder
Vascular cylinder is the root core that consists of xylem and phloem tissues surrounded by one cell thick pericycle cell tissues.
Pericycle is involved in secondary growth and the formation of lateral roots.
Usually, xylem and phloem tissues are arranged in a star-shaped pattern.
Xylem tissue transports water and mineral salts, whereas phloem tissue transports organic substances such as sucrose and plant hormone.
Chapter : Nutrition in Plants
Topic : Organs of Water Uptake and Mineral Salts
Form 5
Biology
View all notes for Biology Form 5
Related notes
Main Inorganic Nutrients
Diversity in Plant Nutrition
Organisation of Plant tissue
Meristematic Tissues and Growth
Growth Curves
Leaf Structure
Main Organ for Gaseous Exchange
Main Organ for Transpiration
Main Organ for Photosynthesis
Compensation Point
Report this note
Homework Help
Get your homework done with live tutors’ help
Learn more
Register for a free Pandai account now
Edit content
×
Loading...
Quiz
Videos
Notes
Account