1. Plant Parts
Tuesday, March 13

2. What are the parts of a plant?
Node: swollen part of stem where buds form (leaves or stems grow here) Cotyledons: leaves formed at first node (cotyledonary node)

4. What are the parts of a plant?
Epicotyl: all of plant formed above cotyledonary node Internode: stem tissue between nodes

5. What are the types of stems?
1) Woody Stem: trees, shrubs, woody perennials 2) Grass Stem: hollow or filled 3) Herbaceous Stem: like woody but softer (clover, alfalfa) 4) Modified Stem:

6. Types of Modified Stems
Bulbs: (onion)
Tubers: (potato)
Stolons: above ground runner (strawberry)
Rhizomes: below ground runners (field bindweed or creeping jenny)

7. What are buds?
special tissue on stems that can grow into new plant parts
buds are described according to:

8. Buds 1) structures into which they grow 2) where buds appear on stem
-Vegetative: leaves or stems
-Floral: flowers
-Mixed: both
2) where buds appear on stem
-Apical: tips of stems
-if floral = bush
-if vegetative = vine
-Axillary: where leaf joins stem
-Adventitious: near wounds
3) How buds are arranged

9. Bud Arrangements Alternate (alfalfa) Opposite (beans)
Whorled (not common)

10. What is Apical Dominance?
apical bud tries to make plant grow taller or longer
if we remove apical bud, we remove the apical dominance

11. What is the difference between a simple leaf and a compound leaf?
simple leaf = 2 parts
(leaf blade and petiole)

12. What is the difference between a simple leaf and a compound leaf?
Compound leaf: leaf blade divided into leaflets

13. What are the different types of compound leaves?
Palmately compound

14. What are the different types of compound leaves?
Pinately compound

15. What are the different types of compound leaves?
Trifoliate (alfalfa)

16. What is the Hypocotyl?
part of the plant below the cotyledonary node

17. What purpose does the hypocotyl serve?
1) anchor plant 2) absorb water & nutrients 3) store food

18. What are the types of root systems?
-Taproot: one main root, has no nodes
(carrot, evergreen, kochia)
-Fibrous root: many nodes, branching root system (grasses)

19. To help prevent soil erosion, which root system would be best?
Fibrous

20. What are the parts of a grass plant?
Leaves = Sheath is the part of leaf that wraps around the stem
Joints = internodes
Culm = stems

21. Grass Plant Parts
Tillers = branches, all branch from the base of the plant
Crown = union of roots and stem
Jointing stage = stems elongate rapidly