Plant -Water Relations
Chapter Name : Transport In Plants |
Sub Topic Code : 103_11_11_02_04 |
Topic Name : Plant -Water Relations |
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Sub Topic Name : Imbibition |
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Introduction
It is a special type of diffusion where water is absorbed by parts of the plant such as seedlings and wood causing them to increase in the size.
Pre-Requisites:
• Parts of the plant. • Diffusion process.
Activity:
Sow a seed initially placed in water and a dry seed in the soil. See which seed shoots out first and study the effect of imbibition on seed germination.
Real Life Question:
In rainy season, what causes the wooden door to swell making it difficult to open or close?
Key Words / FlashCards
| Key Words | Definitions (pref. in our own words) |
|---|---|
| Imbibition | It is the uptake of water along the concentration gradient by the solid part of the plant such as seed and wood. |
| Pressure due to imbibition | Causes the seedlings to emerge out of the soil into the open. |
| Water potential gradient | Essential between the liquid and the absorbent for imbibition. |
Learning aids / Gadgets
| Gadgets | How it can be used |
|---|---|
| Dry Seeds | Take some dry seeds of any plant and put in water for long time. Look out for the swelling of the seed due to intake of water by seed |
Real life uses :
Imbibitions is necessary for germination of seed and hence, for the growth of the plant.
Places to visit :
Garden, farm, etc.
Practical examples around us
| Examples | Explainations |
|---|
What you learn in Theory:
Uptake of water by seeds and wood through the process called as imbibition.
What you learn in Practice:
How seeds intake water and germinate.