Plant Nutrition

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Plant Nutrition

  1. 1. plant nutrition Hasimah Azit
  2. 2. Nutrients Essential: required for the plant life cycle Macro- (large amounts) carbon, oxygen, hydrogen, nitrogen, sulfur, phosphorus, potassium, calcium, magnesium
  3. 3. chlorine, iron, boron, manganese, zinc, copper, molybdenum, nickel Micro- (small amounts) cofactors of enzyme action
  4. 4. Soil <ul><li>Determines plant growth & variety </li></ul><ul><li>Composition/ horizons : </li></ul><ul><ul><li>topsoil (rock particles, living organisms, humus-partially decayed organic material) </li></ul></ul><ul><ul><li>loams (equal amounts of sand, silt, and clay) </li></ul></ul>
  5. 5. List the importance of macronutrient and micronutrient for healthy plant growth
  6. 6. Deficiency
  7. 8. Nitrogen deficiency
  8. 10. Potassium deficiency
  9. 11. Ferum deficiency
  10. 12. Manganese deficiency
  11. 13. photosynthesis Photosynthesis is the process by which organisms convert solar energy to chemical energy
  12. 14. History of photosynthesis
  13. 15. Leaves organization
  14. 20. What conclusion can you make from these picture?
  15. 21. How the leaves are arranged to maximize exposure to light?
  16. 22. Leaf structure
  17. 26. chloroplast
  18. 27. Stoma
  19. 28. Draw and label the cross section of the leaf
  20. 29. Chloroplast Contain green pigment called chlorophyll to absorb light
  21. 30. High density of the chloroplast in palisade mesophyll.
  22. 33. <ul><li>Xylem : </li></ul><ul><ul><li>Transport water absorb by root to the leaf </li></ul></ul><ul><li>Phloem : </li></ul><ul><ul><li>Transport organic material produce by photosynthesis from the leaf </li></ul></ul>Veins
  23. 34. Stomata and guard cell
  24. 36. Gas exchange <ul><li>Carbon dioxide from atmosphere diffuses into the leaf </li></ul><ul><li>Oxygen diffuses out </li></ul><ul><li>The opening controlled by guard cell </li></ul>
  25. 42. How the plant from different habitat adapted to carry out photosynthesis? <ul><li>Desert plant problems: </li></ul><ul><ul><li>Too dry – not enough water </li></ul></ul><ul><ul><li>Too hot – so much sunlight/ loss of water </li></ul></ul><ul><ul><ul><li>Succulent stem – store water </li></ul></ul></ul><ul><ul><ul><li>Less / no leaves – less transpiration </li></ul></ul></ul><ul><ul><ul><li>Sunken stomata – less transpiration </li></ul></ul></ul><ul><li>Water plant problems: </li></ul><ul><ul><li>Too much water </li></ul></ul><ul><ul><li>Not enough light </li></ul></ul><ul><ul><ul><li>Big wide spread leaves </li></ul></ul></ul><ul><ul><ul><li>Float </li></ul></ul></ul><ul><ul><ul><li>Stomata on top </li></ul></ul></ul>
  26. 43. <ul><li>1.10 Understanding photosynthesisA student is able to: </li></ul><ul><li>Describe the development that leads to the discovery of photosynthesis </li></ul><ul><li>State the substances required and the substances produced from photosynthesis </li></ul><ul><li>Draw and label the cross-section of a leaf </li></ul><ul><li>State the function of each part of the leaf with respect to photosynthesis </li></ul><ul><li>Explain how plants from different habitats are adapted to carry out photosynthesis </li></ul><ul><li>1.11 Understanding the mechanism of photosynthesisA student is able to: </li></ul><ul><li>Identify parts of chloroplast related to photosynthesis </li></ul><ul><li>Explain the light and dark reactions of photosynthesis, compare and contrast, relate both the reactions </li></ul><ul><li>Write the equation representing the proses of photosynthesis </li></ul><ul><li>1.12 Synthesising factors affecting photosynthesisA student is able to: </li></ul><ul><li>Identify factors affecting the rate of photosynthesis </li></ul><ul><li>Identify the factor that limits the rate of photosynthesis at different light intensity </li></ul><ul><li>Explain the effects of temperature and concentration of carbon dioxide on the rate of photosynthesis </li></ul><ul><li>Explain the difference in the rate of photosynthesis in plants throughout the day based on the changes in light intensiy and temperature </li></ul><ul><li>Explain some ways of meeting the need of increasing the productivity of crops </li></ul><ul><li>1.13 Practising a caring attitude towards plantsA student is able to: </li></ul><ul><li>Tell why we need to take good care of plants </li></ul><ul><li>Identify cases of mishandling or destruction of plants </li></ul><ul><li>1.14 Understanding the technology used in food productionA student is able to: </li></ul><ul><li>Explain the need for improving the quality and quantity of food </li></ul><ul><li>Explain the effort to diversify food production </li></ul><ul><li>Explain ways to improve the quality and quantity of food production in the country </li></ul>
  27. 44. the mechanism of photosynthesis Photosynthesis occurs in chloroplast Two stages: light reaction – need light – in grana dark reaction – happen in light or dark – in stroma
  28. 45. Light reaction <ul><li>Occurs only in the presence of light, in grana </li></ul><ul><li>Chlorophyll captures light and become exited </li></ul><ul><li>Electron leaves the chlorophyll. </li></ul><ul><li>Light energy causes the water molecules to split into hydrogen ions and hydroxyl ions </li></ul><ul><ul><ul><li>Photolysis of water </li></ul></ul></ul><ul><li>Hydrogen ion receives electron from chlorophyll and become atom </li></ul><ul><li>Hydroxyl ion gives electron to chlorophyll. </li></ul>
  29. 46. water hydrogen ion + hydroxide ion chlorophyll chlorphyll + electron
  30. 47. hydrogen ion + electron hydrogen atom hydroxide - electron water + oxygen
  31. 48. water H + OH + - chlorophyll H [atom] e chlorophyll + e H O + O 2 2
  32. 49. ATP and hydrogen atom move to the stroma <ul><li>Hydrogen atom will react with carbon dioxide to form sugar </li></ul><ul><li>Photosynthetic enzyme involves </li></ul><ul><li>[CH 2 O] is the basic unit for glucose </li></ul>
  33. 50. carbon fixation in the stroma sugar ( CHO) + H O H atom + CO 2 2
  34. 51. photosynthesis reaction: carbon dioxyde + water glucose + oxygen
  35. 52. <ul><li>6 H 2 O + 6 CO 2 </li></ul><ul><li> C 6 H 12 O 6 </li></ul>
  36. 53. Discuss the differences light reaction and dark reaction:
  37. 54. Design an experiment!
  38. 55. Factors Affecting Photosynthesis Light intensity Concentration of carbon dioxide Temperature
  39. 56. Improving food production group discussion and presentation: <ul><li>Diversify food production </li></ul><ul><li>Improve quality </li></ul><ul><li>Improve quantity </li></ul>

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