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

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Presentation transcript:

III.LIMITING FACTORS IN PLANT GROWTH Light Temperature Carbon Dioxide

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

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

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

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

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

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

Light intensity increase Carbohydrate produced Photosynthesis Temperature & Carbon dioxide constant

Carbon dioxide increase Carbohydrate produced Photosynthesis Temperature & Light intensity constant

Temperature increase Carbohydrate produced Photosynthesis Light intensity & Carbon dioxide constant

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

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

Temperature increase Carbohydrate metabolized Respiration

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

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

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

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

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

Temperature increase Carbohydrate metabolized or produced

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

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