1. Introduction to Horticulture PLSC 2100 Mr. Warnick
Stems
Introduction to Horticulture
PLSC 2100
Mr. Warnick

2. At the completion of this unit students will be able to:
A. Describe

3. Growth of stems increase plant
WIDTH
AND
Height

4. Stem Functions 1. Conducts water and minerals from soil to leaves
2. Conducts manufactured food from leaves to other plant parts
3. Produces leaves and displays them to light
4. Supports leaves, flowers and fruit
5. Stores food reserves in some plants—potato, asparagus, cabbage hearts, etc.

5. Modified Stems
Not all stems grow above ground

6. Rhizome An underground stem that grows horizontally.
It may grow adventitious roots and stems to develop as a separate plant examples include iris and wild ginger.

7. Tuber Is an enlarged part of a stem that grows underground.
A tuber can develop into a separate plant. -examples include potatoes and yams.

8. Tendril
Is a threadlike leafless growth on a stem that attaches itself around other stems and objects.
Tendrils typically grow in a spiral shape. After attaching itself, it holds the stem in position.
Vines and climbing plants often have tendrils. -examples include sweet peas and cucumbers.

9. Stolon
Is an above ground stem that grows horizontally and propagates new plants. -examples include strawberries

10. Bulb
Is an underground food-storage organ consisting of flattened, fleshy stem-like leaves with roots on the lower side examples of bulbs are onions

11. Corm
Is a food storage structure at the end of a stem that grows underground.
It is an enlarged or swollen stem base examples include gladiolus and crocus.

12. XYLEM
Water goes up

13. Phloem
Sugars go down

16. Review

17. Monocot vs. Dicot

18. Monocot vs. Dicot

19. Monocot vs. Dicot

20. Taproot or Fibrous root

21. Taproot or Fibrous root?

22. Taproot or Fibrous root?

23. Taproot or Fibrous root?

24. Taproot or Fibrous root?

25. What is this?
Stomata

26. Bulb

27. Tendril

28. Rhizome

29. Stolon

30. Corm

31. Tuber