1. III.LIMITING FACTORS IN PLANT GROWTH Light Temperature Carbon Dioxide

2. 6CO 2 + 12H 2 O + Light energy + Heat (temperature) C 6 H 12 O 6 + 6 O 2 + 6 H 2 O Photosynthesis

3. Photosynthesis Temperature, CO 2, Light Intensity Fig 1. Fig 3. Fig 2.

4. Carbohydrate Light, Temperature, CO 2 Fig 4.Fig 5.

5. Respiration C 6 H 12 O 6 + O 2 CO 2 + H 2 O + ATP

6. Respiration & Photosynthesis Fig 6.Fig 7. Fig 8.

8. Compensation Point Fig 8. Fig 9. Fig 11.Fig 10.

9. Light intensity increase Carbohydrate produced Photosynthesis Temperature & Carbon dioxide constant

10. Carbon dioxide increase Carbohydrate produced Photosynthesis Temperature & Light intensity constant

11. Temperature increase Carbohydrate produced Photosynthesis Light intensity & Carbon dioxide constant

12. Carbon dioxide increase Carbohydrate produced Photosynthesis Temperature constant Low light intensity Medium light intensity High light intensity

13. Light intensity increase Carbohydrate produced Photosynthesis Temp 70 & 85; CO2 340 ppm Temp 70; CO2 1300 ppm Temp 85; CO2 1300 ppm A BC

14. Temperature increase Carbohydrate metabolized Respiration

15. Light intentsity Carbohydrate produced or metabolized Photosynthesis Respiration Constant temperature Light saturation point Light compenation point

16. Temperature increase Carbohydrate metabolized or produced Photosynthesis Respiration Compensation point Apparent photosynthesis

17. Temperature increase Carbohydrate metabolized or produced Photosynthesis Respiration Compensation points Top leaf Middle leaf Bottom leaf

18. Temperature increase Carbohydrate metabolized or produced Photosynthesis Respiration Compensation points High light Low light

19. Temperature increase Carbohydrate metabolized or produced Photosynthesis Respiration Compensation points High CO2 Low CO2

20. Temperature increase Carbohydrate metabolized or produced

21. Light intensity increase Carbohydrate produced Photosynthesis Temp 70 & 85; CO2 340 ppm Temp 70; CO2 1300 ppm Temp 85; CO2 1300 ppm A B C

22. III.LIMITING FACTORS IN PLANT GROWTH A. Compensation Point 1. Low light vs. high light 2. Low CO2 vs. high CO2 3. Sunny day vs. cloudy day 4. Summer vs. winter B. Light Intensity vs. Temperature C. Light vs. Carbon Dioxide D. Light vs. Temperature vs. –Carbon Dioxide