Title: 15 Main Factors Affecting Photosynthesis
Headings: 15 Main Factors Affecting Photosynthesis
15 Main Factors Affecting Photosynthesis
Factor # 1. Temperature:
Factor # 2. Carbon Dioxide Concentrations:
Factor # 3. Light:
Factor # 4. Intensity:
Factor # 5. Quality:
Factor # 6. Duration:
Factor # 7. Oxygen:
Factor # 8. Water:
Factor # 9. Mineral Elements:
Factor # 10. Air Pollutants:
Factor # 11. Chemical Compounds:
Factor # 12. Chlorophyll Contents:
Factor # 13. Protoplasmic Factor:
Factor # 14. Accumulation of Carbohydrates:
Factor # 15. Blackman’s Principle of Limiting Factors:
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Content: Factor # 4. Intensity: When CO 2 and temperature are not limiting and light intensities are low, the rate of photosynthesis increases with an increase in its intensity. At a point saturation may be reached, when further increase in light intensity fails to induce increase in photosynthesis. Optimum or saturation intensities may vary with different plant species e.g., C 4 and C 3. C 3 plants become saturated at levels considerably lower than full sunlight but C 4 plants are usually not saturated at full sunlight. When the intensity of light falling on a photosynthesizing organ is increased beyond a certain point, the cells of that organ become vulnerable to chlorophyll catalyzed photo-oxidations. Consequently, these organs begin to consume O 2 instead of CO 2 and CO 2 is released. Photo-oxidation is maximal when O 2 is present or carotenoids are absent or CO 2 concentration is low. Factor # 5.