1. Transport in Plant What you would learn?
The transport structures of plants.
How substances move in plants.
How water enters the plants.
How water move against gravity.

2. Vascular Tissues A system of transport vessels in plants.
Composed of xylem and phloem.
How do you think I made these purple leaves.
How do u think I dye the leaves?
Water would be absorbed from the roots, up to the stems and finally to the leaves.
This experiment shows that movement of substances up from the roots to the leaves.
At the same time, during ps, glucose would be produced and sugar would be transported to different part of the plants as well.
Today we are going to learn how are water being absorbed through the roots in to the plants. It movements up the plant and finally to the leaves.
Transverse section of a typical
Dicotyledonous plant stem.

3. Vascular tissues extends from the roots
through the stem
to the leaves.

4. Xylem tissues Long, hollow cylindrical tubes.
Dead -> little resistance to water flow.
Conducts water and dissolved mineral salts from roots to stem and leaves.

5. Xylem tissues Wall are lined with lignin.
Lignin -> tough and hard substance.
Deposited in spiral, ring, pit.
Provides mechanical support for the plants.
Refer to t

6. Phloem tissue
Transport manufactured food (amino acid and sucrose) from the green parts to other parts of the plant.
 Translocation
Sieve tubes and companion cells.
Summary

7. Sieve tube Columns of elongated thin-walled living cells.
Degenerated protoplasm.
Cells separated by cross wall known as sieve plates.
Holes rapid flow of sugars through the tubes. -
Analogy
A patient suffering from cancer  he needs a caretaker to take care of him.
Sieve plates

8. Companion cells
Provides nutrients and help sieve tubes cells to transport food.
Numerous mitochondria to provide energy to load sugars from the mesophyll tissue into the sieve tubes.
Energy needed -> Active transport

9. Arrangement of vascular tissues in stems
What do you notice about the arrangement of vascular tissues in the stem?
All these are the vascular tissues?
What can u say abt the arragement?
Which one is xylem? Which one is phloem?
Xylems are long hollow tubes

10. Vascular Tissues in Stems.
Xylem and phloem grouped together to give vascular bundles.
Arranged in a ring around the pith.
Epidermis
(covered with cuticle)
Cortex
Emphasis that phloems is always at the outside
What is the function of a cuticle
Phloem
(near to the ‘outside’)
Xylem
Pith

11. Vascular bundles Cambium Xylem Phloem
Divided and differentiate to form new xylem and phloem tissue
Cambium
Phloem

12. Arrangement of vascular tissues in roots
What do you notice about the arrangement of vascular tissues in the stem?
where are the vascular tissues?
Recognise the hollow tubes?
What are they -> xylem
Where do u think is the phloem?

13. vascular tissues in roots
Xylem and phloem alternate to each other.
Not grouped in bundles.
Phloem
Xylem

14. Structure of roots Root hair Epidermis / piliferous layer Cuticle?
Cortex
do they have cuticle ?
Why not?
What is the function of the cortex?
Rest for 2 min

15. Is this from root, stem or leaf?
How do you

16. Is this from root, stem or leaf?
B -

17. Identify X & Y x y

19. Studying the movement of water through a plant

20. Studying of movement of sugars from leaves to other parts
Using aphids
Using carbon-14 isotopes.
Using ring experiment

21. Ringing experiment Why is there swelling above the cut region?
Removing of bark would remove phloem.
Accumulation of food substances would cause swelling above the cut region.

22. Pg 179
Test Yourself