1. Plant Growth

2. Plant Growth
Trumpet vine

3. Patterns of Growth 1. Annual Germinate, mature & reproduce in one year
E.g. marigolds
petunias

4. Patterns of Growth 2. Biennial
Takes two years to germinate, mature & reproduce
flax
carrots

5. Patterns of Growth 3. Perennial – lives for many years Maple tree
Chrysanthemum

6. Growth in Meristems

7. Meristems
The growing regions of plants
Where cells continually divide

8. Meristematic Tissue
Only type of plant tissue that makes new cells by mitosis
Cells will change into the 3 types of plant cells shortly after division
Location: roots & shoots

9. Meristem Locations

10. Types of Meristems
Apical
Intercalary
Lateral
Axillary

11. Apical Meristems At tips of stems, branches, & roots
Cause plant to grow taller, roots to grow deeper

12. Intercalary Meristems
Location: above the bases of leaves & stems
Allow grass leaves to quickly re-grow after being mowed or grazed

13. Lateral Meristems
Allow stems & roots to increase in diameter (i.e. get thicker)
Vascular cambium – btwn. xylem & phloem, makes vascular tissue
Cork cambium - outside phloem
- Produces cork (e.g. bark of trees)
(dead cells that replace epidermis in woody stems & roots f(x) = protection) -

14. Axillary Meristems
In the joints where leaves attach to the stems

15. Coleus shoot tip
Leaf primordia
Leaf
Apical meristem
Axillary meristem

16. Types of Growth Primary Growth – elongation (stems & roots)
- in all plants
Secondary Growth
- makes the plant thicker
- in all dicots,
but not in all monocots