1. Plant Tissues and Organs

2. Fig. 38.6

3. Modular construction of a shoot

4. Basic Plant Morphology
TISSUES- a group of cells functioning together in some specialized activity
MERISTEMS- a mass of self-perpetuating cells, which are not yet committed to developing into a specialized cell type
Terminal meristems- ends of stems, branches and roots
Axillary meristems- base of leaves, branches
Lateral meristems are parallel to sides of plant parts and increase girth.

5. Meristem types Primary Secondary Apical Meristems Vascular cambium
Cork Cambium

6. Flowering plants have 3 basic tissue types
Dermal
Cover surface of plant
Protection
Ground
Vascular
Conducting tissue

7. Dermal
Epidermis
epidermal cells
Periderm
cork cells

8. Fig a

9. Fig b

10. Fig c

11. Vascular Tissue Xylem Phloem Mostly to conduct water and nutrients
E.g., roots to shoots
Phloem
Mostly to conduct sugars, amino acids, etc.
E.g., leaves to roots or flowers

12. Fig a

13. Fig. 4.6

14. Fig. 4.9

15. Fig b

16. Fig a

17. Fig b

18. Vegetative Organs
Roots
Stems
Leaves

19. Function of roots Anchor the plant Absorb water and minerals from soil
Storage

20. Longitudinal section of roots
Root cap
Zone of cell division
Zone of cell elongation
Zone of maturation

21. Cross section of root
Vascular bundle (Stele) = contains xylem and phloem
Cortex
Epidermis
Root hairs
Absorb water and minerals

22. Fig

23. Fig

24. Function of Stems support leaves to maximize light absorption
part of conduit for transport of water, minerals, and organic solutes
storage

25. Fig a

26. Fig b

27. Woody dicots
Discrete vascular bundles replaced by continuous rings of xylem
Each ring is xylem produced during one growing season
Vascular cambium

28. Fig. 38.7a

29. Fig. 38.7b

30. Stems: Secondary growth
Vascular tissue, (xylem) makes up the bulk of the stem
Form tree rings

31. Fig

32. Fig a

33. Fig b

34. Fig c

35. Function of leaves
Main photosynthetic structure

36. Leaf parts
Blade
Petiole
Pair of stipules

37. Fig

38. Fig. 38.8

39. Fig

40. Fig