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Plant Parts. Chapter #3. 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). What are the parts of a plant?. Epicotyl : all of plant formed above cotyledonary node

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plant parts

Plant Parts

Chapter #3

what are the parts of a plant
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)

what are the parts of a plant4
What are the parts of a plant?

Epicotyl: all of plant formed above cotyledonary node

Internode: stem tissue between nodes

what are the types of stems
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:

types of modified stems
Types of Modified Stems
  • Bulbs: (onion)
  • Tubers: (potato)
  • Stolons: above ground runner (strawberry)
  • Rhizomes: below ground runners (field bindweed or creeping jenny)
what are the functions of stems
What are the functions of stems?

1) transport water, nutrients, sugars

2) support leaves

3) store food

what are buds
What are buds?
  • special tissue on stems that can grow into new plant parts
  • buds are described according to:
slide9
1) structures into which they grow
    • -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
bud arrangements
Bud Arrangements
  • Alternate (alfalfa)
  • Opposite (beans)
  • Whorled (not common)
what is apical dominance
What is Apical Dominance?
  • apical bud tries to make plant grow taller or longer
  • if we remove apical bud, we remove the apical dominance
what are leaves
What are leaves?
  • undergo photosynthesis, exchange gases
what is the difference between a simple leaf and a compound leaf
What is the difference between a simple leaf and a compound leaf?
  • simple leaf = 2 parts (leaf blade and petiole)
what is the difference between a simple leaf and a compound leaf14
What is the difference between a simple leaf and a compound leaf?
  • Compound leaf: leaf blade divided into leaflets
what is the hypocotyl
What is the Hypocotyl?
  • part of the plant below the cotyledonary node
what purpose does the hypocotyl serve
What purpose does the hypocotyl serve?

1) anchor plant

2) absorb water & nutrients

3) store food

what are the types of root systems
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)

what are the parts of a grass plant
What are the parts of a grass plant?
  • Leaves = Sheath is the part of leaf that wraps around the stem
  • Joints = internodes
  • Culm = stems
grass plant parts
Grass Plant Parts
  • Tillers = branches, all branch from the base of the plant
  • Crown = union of roots and stem
  • Jointing stage = stems elongate rapidly
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