Uptake And Transport Of Mineral Nutrients
Chapter Name : Transport In Plants |
Sub Topic Code : 103_11_11_05_01 |
Topic Name : Uptake And Transport Of Mineral Nutrients |
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Sub Topic Name : Uptake Of Mineral Ions |
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Introduction
Plants absorb minerals through the root hairs by active absorption into the cytoplasm of epidermal cells.
Pre-Requisites:
• Structure of the root hair. • Active and passive transport.
Real Life Question:
Plants get carbon and oxygen through CO2, but how do they get other minerals that they require for growth and survival?
Key Words / FlashCards
| Key Words | Definitions (pref. in our own words) |
|---|---|
| active absorption | Most minerals enter the root by active absorption in the cytoplasm of epidermal cells using energy in the form of ATP. Uptake of ions is partly responsible for water potential gradient in rots and therefore, for uptake of water by osmosis. |
| Specific transport proteins | Present in the membrane of root hair cells. They actively pump ions from the soil into the cytoplasm of the epidermal cells. |
| Transport proteins act as control points | They adjust the quantity and types of solutes that reach the xylem. |
| Suberin layer | Present in the root of endodermis. They actively transport ions in one direction only. |
Learning aids / Gadgets
| Gadgets | How it can be used |
|---|---|
| Encyclopedia and internet. | Try to find which minerals are important for plants and which minerals cause harm to the plants. |
Real life uses :
Plants require various minerals for their growth and survival.
Places to visit :
Biology Laboratory or Google.
Practical examples around us
| Examples | Explainations |
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What you learn in Theory:
Minerals are absorbed by the plant roots through active absorption in the cytoplasm of epidermal cells with the help of membrane proteins.
What you learn in Practice:
How plant roots absorb minerals.