Title: [Explained] Factors Affecting Photosynthesis
Headings: [Explained] Factors Affecting Photosynthesis
[Explained] Factors Affecting Photosynthesis
Light
Carbon Dioxide Concentration
Temperature
Water

Content: Graph Of How Light Affects The Rate Of Photosynthesis
Light
When we discuss light as a factor that affects photosynthesis we try to  differentiate it into three parts namely light intensity, light quality and  the duration of exposure to light. There is a linear relationship between  incident light and CO2 fixation rates at low intensities. At higher  intensities the rate does not keep increasing exponentially because the  other factors such as water, CO2 concentration and temperature limit the  rate gradually. It is interesting to know that light saturation occurs at 10 per cent of  the full sunlight. What this means as a factor for photosynthesis is that  light is rarely a limiting factor only exceptions being the plants that  stand in shade or plants in thick forests. Trees in those forests need to  compete each other for available resources just like in a normal population  of humans. Increase in incident light beyond a point results in the decrease of  photosynthesis due to the breakdown of chlorophyll. Carbon Dioxide Concentration
The major limiting factor for photosynthesis is Carbon Dioxide (CO2). As  the carbon dioxide concentration is very low in the atmosphere. In  percentage terms it can be put somewhere between 0.03 to 0.04 per  cent.