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The Leaf LEAVES: Function: Photosynthesis (food production for - PowerPoint PPT Presentation

The Leaf LEAVES: Function: Photosynthesis (food production for the whole plant). Transpiration Blade: Flat expanded area Petiole: stalk that connects leaf blade to stem, and transports materials Simple Leaf Compound Leaf


  1. The Leaf

  2. LEAVES:  Function: Photosynthesis (food production for the whole plant).  Transpiration  Blade: Flat expanded area  Petiole: stalk that connects leaf blade to stem, and transports materials

  3. Simple Leaf Compound Leaf

  4. The Leaf Arrangement

  5. Typical Dicot Leaf

  6. Modified leaves

  7. Modified leaves Dune grass leaf with highly developed sclerenchyma

  8. Modified leaves Water lily leaf with highly developed spongy parenchyma

  9. The leaves have been completely modified into a cactuses thorns.

  10. American Beech leaves Maple leaves Sassafras leaves

  11. Northern Red oak White Oak Pignut hickory Flowering Dogwood

  12. Photosynthesis 1. Definition PHOTO = produced by light SYNTHESIS = manufacturing. PHOTOSYNTHESIS is the process whereby plants, algae and some bacteria, use the energy of the sun to synthesize organic compounds ( sugars ) from inorganic compounds ( CO 2 and water ).

  13. 2. General Equation of Photosynthesis. Carbon Dioxide + Water+ Light Glucose + O2 CO 2 + H 2 O+Light C 6 H 12 O 6 + O 2 + H 2 O pigments, enzymes

  14. 3. Where?

  15. Chlorophyll a is the primary photosynthetic pigment that drives photosynthesis. Accessory pigments absorb at different wavelengths, extending the range of light useful for photosynthesis.

  16. WHY IS PHOTOSYNTHESIS SO IMPORTANT? PHOTOSYNTHESIS is one of the most • important biological process on earth! Provides the oxygen we breathe • Consumes much of the CO 2 • Food • Energy • Fibers and materials •

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