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: It shows minimum, optimum and maximum temperatures. Between the C 3 and C 4 plants, while the former species have optimal rates from 20-26°C, the latter species may show optimal rates from 35-40°C. Similarly, temperature also influences the light (optimum, 30-35°C) and dark respiration (optimum 40-45°C). Factor # 2. Carbon Dioxide Concentrations: ADVERTISEMENTS: Nearly 0.032% by volume of carbon dioxide is present in the atmosphere and at this low level it acts as a limiting factor. Under laboratory conditions when light and temperature are not limiting factors, increase in CO 2 concentration in the atmosphere from 0.03% to 0.3-1% raises rate of photosynthesis. With the further increase in the concentration of CO 2 progressively the rate of carbon assimilation increases slightly and then it becomes independent of CO 2 concentration. Thereafter, it remains constant over a wide range of CO 2 concentrations.