The rate of photosynthesis process is affected by several external ( enviromental) internal factor, these factors are Temperature Light Water Carbon dioxide 1. Light The ultimate source of light for photosynthesis is solar radiation. Out of total solar energy reaching to the earth, only a very small portion ( about 2%) is used in photosynthesis. Light varies in intensity, quality ( wavelength ) and duration. Under low light intensity the rate of photosynthesis is also low. At very high light intensity the photosynthesis is decreased due to photo oxidation of constituents. The quality or wavelength of light also affect photosynthesis. For eg. Green pigment chlorophyll mostly absorb blue and red light they reflect green light. Therefore photosynthesis is high in blue or red light and very low in green light 2. Temperature The rate of photosynthesis increase by increase in temperature upto 40°C. Above 40°C there is decrease in photosynthesis process. Similarly low temperature also st...
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