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Class Rules

Class Rules. Punctuality The last person to come into the class later than me will teach the class for 2 minutes on a selected topic by yours truly. Homework to be returned during the first Theory lesson of the week. Cleanliness Courtesy If you need to speak, raise your hands.

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Class Rules

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  1. Class Rules • Punctuality • The last person to come into the class later than me will teach the class for 2 minutes on a selected topic by yours truly. • Homework to be returned during the first Theory lesson of the week. • Cleanliness • Courtesy • If you need to speak, raise your hands. • If someone is speaking, open your ears, and not your mouth. • Consistency • You must always have your notes with you. • Commitment • If you are tasked to do something, I expect it to be done with all your effort.

  2. Plant Nutrition Photosynthesis

  3. Topic Overview Plant Nutrition 5.2 Photosynthesis 5.1Plant Structure & Function 5.3 Leaf Adaptation & Photosynthesis 5.4 Plant Mineral Nutrition 5.1.1 General Plant Anatomy 5.1.2 Leaf Structure and Function 5.1.3 Structural Diversity in Flowering Plants • 5.2.1 The Importance of Photosynthesis • 5.2.2 Essential Conditions for Photosynthesis • 5.2.3 Plant pigments • 5.2.4 Absorption and Action Spectra • 5.2.5 Photosynthesis – The Process • 5.2.6 Fate of the Products of Photosynthesis • 5.2.7 Factors Influencing the Rate of Photosynthesis • 5.2.8 Compensation Point • 5.2.9 Role of Guard Cells • 5.2.10 Water and Carbon Dioxide Uptake 5.3.1 Structural Adaptations 5.3.2 Sun & Shade Leaves • 5.4.1 Nitrates • 5.4.2 Magnesium

  4. Learning Objectives • By the end of the lesson, you should be able to: • Describe the factors that influence stomatal opening. (If time permits) • Describe the formation of carbohydrates and their subsequent storage. • Outline the intake of carbon dioxide and water by plants for photosynthesis.

  5. Factors that Control Stomata Opening

  6. Fate of Photosynthetic Products PHOTOSYNTHESIS 1. Glucose used directly as 2. Sucrose in daylight, excess converted to in darkness, converts back to Glucose formed 3. Starch Reacts with Nitrates & Mineral Salts to form 4. Amino Acids used directly as Amino Acids 5. Proteins excess used as 6. Fats forms

  7. Fate of Photosynthetic Products THE CARBOHYDRATES • Glucose • Cellular Respiration in the leaf • Cellulose Cell Wall • Sucrose • For transport out of the leaf to other storage organs • Starch • For storage directly in the leaf C C C C C C

  8. Fate of Photosynthetic Products PROTEINS & AMINO ACIDS • Amino Acids • For building of protoplasm • Conversion to Proteins for storage. • Proteins • For building new protoplasm.

  9. Fate of Photosynthetic Products FATS & LIPIDS • FATS • For building of protoplasm. • For storage. • For cellular respiration

  10. diastase maltase converted to Starch Maltose Glucose Sucrose for transport erepsin pepsin Proteins Polypeptides Amino Acids Fatty Acids Fats Glycerol Utilizing Stored Products

  11. O2 Photosynthesis: Where Are We Now? 2. Fates of Photosynthetic Products 3. How Mesophyll Cells Import Raw Materials into their Cytoplasm Carbohydrates Proteins Fats 1. How Gaseous Exchange is Controlled chlorophyll Light energy + 12 H2O + 6 CO2 C6H12O6 + 6 O2 + 6 H2O CO2

  12. Water Uptake • From Roots to the Xylem in the Leaves • ..\Transport in Plants\transpiration.swf • From the Xylem in the Leaves to the Mesophyll Cells As photosynthesis proceeds, there is a net consumption of water in the mesophyll cells. This causes the water potential in the mesophyll cells to become more negative. Water from the xylem then enters the mesophyll cells by osmosis. chlorophyll Light energy + 12 H2O + 6 CO2 C6H12O6 + 6 O2 + 6 H2O

  13. Carbon Dioxide Uptake • Photosynthesis lowers [CO2] in the cytoplasm of mesophyll cells. • Thin film of moisture surrounding mesophyll cells now has higher concentration ofdissolved CO2 than cytoplasm. • CO2 diffuses into mesophyll cell cytoplasm down concentration gradient. • Lowers [CO2] in thin film of moisture w.r.t. [CO2] in intercellular air spaces. • CO2 from intercellular air spaces diffuse into thin film of moisture. • Lowers [CO2] in intercellular air spaces wrt atmospheric [CO2] . • Atmospheric CO2 diffuses into intercellular air spaces through stomata. chlorophyll Light energy + 12 H2O + 6 CO2 C6H12O6 + 6 O2 + 6 H2O

  14. PhotosynthesisRap http://www.educationalrap.com/62/photosynthesis.htm

  15. Structural Adaptation for Photosynthesis

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