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
Internode: stem tissue between nodes
What are the types of stems?1) Woody Stem: trees, shrubs,
woody perennials2) Grass Stem: hollow or filled3) Herbaceous Stem: like
woody but softer (clover, alfalfa)4) Modified Stem:
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?
1) transport water, nutrients, sugars
2) support leaves3) store food
What are buds?
• special tissue on stems that can grow into new plant parts
• buds are described according to:
• 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
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 is the difference between a simple leaf and a compound leaf?
• simple leaf = 2 parts (leaf blade and petiole)
Petiole
Leaf
Blade
What is the difference between a simple leaf and a compound leaf?
• Compound leaf: leaf blade divided into leaflets
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?
• Leaves = Sheath is the part of leaf that wraps around the stem
• Joints = internodes• Culm = stems
Grass Plant Parts
• Tillers = branches, all branch from the base of the plant
• Crown = union of roots and stem
• Jointing stage = stems elongate rapidly