Horticulture

Plant Cells

Cell WallONLY IN PLANT CELLSProtection 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 Wall2.Chloroplast

Journal # 3 “Cell Drawings”2/24/14

Observe and Draw:1. General Plant Cell2. Cell with chloroplasts3. Onion skin with Iodine

stainSHOW ME!!!!!

Use Petri dishes as field of view!!!!

Neat, lableled and colored!!!

*Fill Circle with Field of View*COLORS!!!

2. Chloroplasts

100x

Journal # 3 Plant Cells1.Prepare a stained onion skin slide and sketch.2.Prepare elodea “A” and sketch3.Prepare elodea “B” and sketch4.Sketch and Label a general Plant Cell.5.Sketch and label a cell with chloroplasts.

(4 and 5 are prepared slides)