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FACTORS AFFECTING PHOTOSYNTHESIS - Coggle Diagram
FACTORS AFFECTING PHOTOSYNTHESIS
Light
Linear relationship b/w incident light & CO2 fixation rates at low light intensities
At higher light intensities, rate doesn't increase due to other factors which become limiting
Light saturation occurs at 10% in full sunlight
Increase in incident light breaks down chlorophyll, and thus, decreases, photosynthesis
CO2 concentration
Major limiting factor
Increase up to 0.05% cause increase in CO2 fixation rates, after which, it becomes damaging in the long run.
At low light conditions, C3 and C4 plants don't respond to high CO2 conditions. At high light intensities, they show increased rate of photosynthesis
C3 plants saturation level: 360ml/L
C4 plants saturation level: 450 ml/L
Temperature
Dark reactions, being enzymatic, are temp. controlled
Influence of temp. on light reactions is very less
C4 plants have increased rate of photosynthesis at high temps.
C3 plants have much lower temp. optimum
Water
Water stress closes stomata, and reduces CO2 availability
Water stress wilts leaves, reducing surface area of leaves and metabolic activity