Affected by :
Light intensity
Concentration of carbon dioxide
Temperature
Light intensity
Light is essential
during light reaction of photosynthesis.
When concentration of
carbon dioxide & temperature are controlled at constant
levels,
the rate of photosynthesis is directly proportional to light intensity up to a certain point.
As the light intensity
increases, the rate of photosynthesis increases up
to a saturated point
(point P).
Beyond the
saturation point (point P), further increase in light
intensity does not increase
the rate of photosynthesis because
of concentration of carbon dioxide & temperature
become the limiting factors.
Both the concentration of carbon dioxide & temperature stop the rate of reaction from
increasing further along PQ.
The rate of photosynthesis will not increase although the light intensity is increases.
When CO2 concentration is raised to 0.13%, the rate of photosynthesis is higher. (graph II)
At very high light intensity, the rate of photosynthesis slows down because the chlorophyll
pigment is damaged by UV rays.
Both the concentration of carbon dioxide & temperature stop the rate of reaction from
increasing further along PQ.
The rate of photosynthesis will not increase although the light intensity is increases.
When CO2 concentration is raised to 0.13%, the rate of photosynthesis is higher. (graph II)
At very high light intensity, the rate of photosynthesis slows down because the chlorophyll
pigment is damaged by UV rays.
CO2
is required in dark reaction as raw material used in the synthesis
of glucose.
If there is no other limiting factors that limit the photosynthesis process, as the
concentration of carbon dioxide increases, the rate of photosynthesis increases.
Although the concentration of carbon dioxide keeps increasing, the rate of photosynthesis
will not increase further because light intensity acts as limiting factor.
If there is no other limiting factors that limit the photosynthesis process, as the
concentration of carbon dioxide increases, the rate of photosynthesis increases.
Although the concentration of carbon dioxide keeps increasing, the rate of photosynthesis
will not increase further because light intensity acts as limiting factor.
photosynthesis.
An increase in 100C in the surrounding temperature will decrease the rate of photosynthesis
The optimum temperature of varies for each species.
But most plants : between 250C to 300.
If temperature is too high, photosynthetic enzymes are destroyed by denaturation.
Photosynthesis stops.
