Structure and Function The Cell

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Plant Structure and Function(pg. 23-63)

• Cell
• Tissues

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Structure and FunctionThe Cell (p.25-27)

• Cell wall
• Plasmalamella
• Protoplast
• Cytoplasm
• Plasmodesmata
• Organelles

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Structure and FunctionThe Cell (p.25-27)

• Central Vacuole
• Nucleus
• Ribosomes
• Chloroplast
• Mitochondria

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Tissuesp. 26-29

• Undifferentiated tissues- meristems
• site of cell division
• Differentiated tissues -cells gain function
• such as epidermis, phloem, xylem etc.

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A Maple tree is tapped 2 feet off the ground.If
the tree grows at a rate of 6 per year, how long
will it take for the bucket to be 4 feet off the
ground?
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Meristematic Tissues

• 3 Kinds Apical, Intercalary, Secondary
  (cambium)
• Apical meristem
• shoot root tips
• terminal growth

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Meristems

• intercalary meristem
• growing point at base of leaf in grass
• allows mowing without removing growing point

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Meristems

• secondary meristem
• vascular cambium
• produce phloem xylem
• lateral growth, increase in diameter

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What are characteristics of meristematic tissues?

• a. cell division
• b. occurs in shoot and root tips
• c. undifferentiated tissue
• d. All of the above

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Dermal Tissues

• Epidermis
• outermost layer or layers of stems, leaves,
  roots, flowers
• specialized cells
• guard cells stomata, trichomes

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• Guard Cells and Stomata

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Guard Cell and Stomata
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Dermal Tissues

• In woody dicots and gymnosperms the epidermis is
  sloughed off.
• It is replaced by bark/periderm
• cork cambium - meristematic cells

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Vascular Tissues

• conducting tissue
• derived from lateral meristem
• occurs in cylinder or bundles
• phloem - living tissue
• transports assimilates up and down
• xylem - nonliving
• conducts water nutrients
• provides support wood

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Ground Tissues

• Parenchyma - storage, wound healing,
  photosynthesis, edible plant parts
• Cortex and Pith
• Collenchyma, celery
• Sclerenchyma, nuts, pits
• Living, Living, Dead

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Tissue Review

• Meristem
• Apical
• Intercallary
• Secondary
• vascular cambium
• Dermal
• Epidermis
• Guard cells
• Stomata
• Trichomes

• Vascular
• Xylem
• Dead
• Xy high
• Phloem
• Living
• Phlo low (down and up)
• Ground
• Parenchyma living
• Cortex and Pith
• Storage, healing, food
• Collenchyma living- celery
• Sclerenchyma dead - pit