Xylem and Phloem, translocation and transpiration in plants
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?- Created by: shirinsh1377
- Created on: 06-06-16 16:14
---> Xylem tissue transport water and mineral ions in solution, they move substances up the plants from roots to the leaves. They use transpiration to do so.
-Xylem vessels are long, tube like substances formed from dead cells.
---> Phloem tissue transport organic substances like sugar, both up and down the plants. They do this through translocation.
-Sieve tube elements are living cells that form the tube for transporting solutes, they have no nucleus and few organelles ...
-Companion cells carry out the living functions for them e.g providing energy for active transport.
-Both of them are mass transport system, they move substances over a large distance.
---> Transpiration: Loss of water from plant surface
- Water evaporates form the leaves.
- This creates tension (this pulls more water into the leaves).
- Water molecules are cohesive…
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