Horticulture
Plant Cells
Cell Wall
ONLY IN PLANT CELLS
Protection and support
Rigid and stiff: Made of Cellulose
Permeable (allows substances to pass
through)
Cell Membrane
• Protect and support
• Controls materials in and out
• 8 millionths of a mm thick (it would take
12,500 of them stacked to = the thickness
of a piece of paper!!!!!!!)
Nucleus
• Control Center: regulates activities
– Nuclear Membrane: controls materials in
and out
– Chromosomes: thin, rod-shaped, carry on
traits
– Nucleolus: makes ribosomes
Endoplasmic Reticulum
-Carries proteins through the cell
-System of passageways
Ribosomes
• “Protein Factory”
• Carried by the ER through the cell
• Synthesize proteins
Ribosomes
• Synthesize protein
• Carried by the “ER”
Mitochondria
• Supplies Energy to the cell by breaking
down sugars
Cytoplasm
• Organelles exist in “jelly-like” substance
Vacuole
• Stores food, water, waste
• Can be up to 90% of size of cell
• Rigidity/turgor pressure helps plant
stem remain upright
Lysosomes
• Digest food using enzymes
• Rare in plant cells---why???
• Digest old cell parts
Chloroplast
• GREEN
• Trap sunlight, convert to
chemical energy
• Contain Chlorophyll
• Process: Photosynthesis
Organelles Found Only in Plants:
1. Cell Wall
2. Chloroplast
Journal # 3 “Cell Drawings”
2/17/15
Observe and Draw:
1. General Plant Cell
2. Cell with chloroplasts
3. Onion skin with Iodine stain
SHOW ME!!!!!
Use Petri dishes as field of view!!!!
Neat, lableled and colored!!!
*Fill Circle with Field of View
*COLORS!!!
2. Chloroplasts
100x
1.
2.
3.
4.
5.
Journal # 3 Plant Cells
Prepare a stained onion skin slide and
sketch.
Prepare elodea “A” and sketch
Prepare elodea “B” and sketch
Sketch and Label a general Plant Cell.
Sketch and label a cell with chloroplasts.
(4 and 5 are prepared slides)