Factors necessary for photosynthesis

  • Created by: portia
  • Created on: 25-04-17 11:46

Factors affecting rate of photosynthesis

  • main factors affecting rate of photosynthesis are
    • light intensity and wavelength, temperature and carbon dioxide concentration
  • at constant temperature, rate of photosynthesis varies with light intensity, initially increasing as light intensity increases, but at higher light intensities the rate reaches a plateau
  • at high light intensity the rate of photosynthesis increases as temperature is increased over a limited range, at low light intensity, increasing temperature has little effect on the rate
  • From research we know that photochemical reactions are not generally affected by temperature. These two results illustrate two important things;
    • temperature affects the rate of photosynthesis so there must be two sets of reactions in full process of photosynthesis; a light dependent photochemical stage and a light independent, temperature dependent stage
    • the concept of limiting factors

Limiting Factors

  • rate of a process which depends on a series of reactions is limited by the slowest reaction in the series
  • the rate will be limited by…


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