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Plant Physiology <ul><li>Three Main Processes: </li><ul><li>Photosynthesis
Respiration
Transpiration </li></ul></ul>
Photosynthesis <ul><li>A plants ability to manufacture its own food (energy)
a plant requires: </li><ul><li>energy from sunlight,
carbon dioxide from the air
water from the soil </li></ul></ul>
Photosynthesis <ul><li>The only cells that can carry out photosynthesis are in the mesophyll layer of leaves and stems
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Plant physiology

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Plant physiology

  1. 1. Plant Physiology <ul><li>Three Main Processes: </li><ul><li>Photosynthesis
  2. 2. Respiration
  3. 3. Transpiration </li></ul></ul>
  4. 4. Photosynthesis <ul><li>A plants ability to manufacture its own food (energy)
  5. 5. a plant requires: </li><ul><li>energy from sunlight,
  6. 6. carbon dioxide from the air
  7. 7. water from the soil </li></ul></ul>
  8. 8. Photosynthesis <ul><li>The only cells that can carry out photosynthesis are in the mesophyll layer of leaves and stems
  9. 9. The green pigment, chlorophyll, that is found in the chloroplasts of these cells traps light energy
  10. 10. Creates energy in the form of carbohydrates that are stored in plant cells
  11. 11. This energy allows the plants to carry out metabolic functions such as growth and reproduction. </li></ul>
  12. 12. Respiration <ul><li>Carbohydrates made during photosynthesis are converted to energy.
  13. 13. Energy is used in the process of building new tissues or growth of the plant.
  14. 14. The chemical process is called oxidation. It is similar to the burning of wood or coal to produce heat. </li></ul>
  15. 15. Photosynthesis & Respiration <ul><li>Chemical reactions are opposites
  16. 16. Photosynthesis
  17. 17. Respiration
  18. 18. Photosynthesis is a building process </li><ul><li>Requires energy </li></ul><li>Respiration is a breaking down process </li><ul><li>Releases energy </li></ul></ul>
  19. 19. Comparison <ul><li>Produces food
  20. 20. Energy is stored
  21. 21. Occurs in some cells
  22. 22. Oxygen is released
  23. 23. Water is used
  24. 24. CO2 is used
  25. 25. Occurs in sunlight </li></ul><ul><li>Uses food
  26. 26. Energy is released
  27. 27. Occurs in all cells
  28. 28. Oxygen is used
  29. 29. Water is produced
  30. 30. CO2 is produced
  31. 31. Occurs in light and dark </li></ul>Photosynthesis: Respiration:
  32. 32. Transpiration <ul><li>Transpiration is the process by that a plant loses water, primarily from leaf stomata.
  33. 33. Transpiration involves the use of about 90% of the water that enters the plant through the roots.
  34. 34. The other 10% of the water is used in chemical reactions and in plant tissues.
  35. 35. increase, transpiration increases. As humidity decreases, transpiration increases. </li></ul>
  36. 36. Transpiration purpose <ul><li>Transpiration is necessary for: </li><ul><li>Mineral transport from the soil to the plant parts
  37. 37. Cooling of plant parts through evaporation,
  38. 38. Movement of sugars and plant chemicals,
  39. 39. Maintenance of turgor pressure. </li></ul></ul>

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