Transpiration vs Translocation — Difference (with Table & FAQs)
Transpiration is water loss from leaves into atmosphere. Translocation is movement of food through phloem to all plant parts.
TL;DR: Transpiration is water loss from leaves into atmosphere. Translocation is movement of food through phloem to all plant parts.
Written & reviewed by the Syllab.in Academic Team (CBSE/NCERT subject experts) · Updated
The main difference between Transpiration and Translocation: Transpiration is water loss from leaves into atmosphere. Translocation is movement of food through phloem to all plant parts.
Transpiration vs Translocation — Comparison Table
| Basis | Transpiration | Translocation |
|---|---|---|
| Substance | Water vapor | Sugar and nutrients |
| Vessel | Through leaves into air | Through phloem |
| Direction | Unidirectional, upward and out | Bidirectional, as needed |
| Requires Energy | No, passive process | Yes, active transport |
| Purpose | Cooling, water uptake | Distribution of food |
| Rate | Higher in hot, dry conditions | Constant throughout day |
Key Points
- Transpiration pulls water up from roots
- Translocation distributes photosynthetic products
- Both are essential plant processes
- Transpiration creates water shortage in hot weather
Frequently Asked Questions
What is the difference between transpiration and translocation?
Transpiration is the loss of water vapour from the aerial parts of a plant (mainly the leaves) through stomata. Translocation is the transport of food (sugars made in the leaves) to other parts of the plant through the phloem.
Which tissues are involved in transpiration and translocation?
Transpiration involves water moving up through the xylem and evaporating from the leaves. Translocation moves prepared food through the phloem.
Does translocation move food only downwards?
No. Translocation moves food from the source (leaves) to sinks such as roots, fruits and growing tips — it can travel both upward and downward as the plant needs.