Rate of Photosynthesis
- The rate of photosynthesis is affected by the amount of light, carbon dioxide and the temperature.
- Plants also need water for photosynthesis, but when a plant is so short of water that it becomes the limiting factor, it's already in such trouble that this is the least of its worries.
- The Limiting factor depends in the conditions
- Any of 3 factors can become the limiting factor.
- This just means that its stopping photosynthesis from happening any faster.
- Which factor is limiting at a particular time depends on the environmental conditions:
- at night, light is the limiting fact
- in winter, it is often the temperature
- if it's warm enough and bright enough, the amount of carbon dioxide is usually the limiting factor.
- Not enough light slows down the rate of photosynthesis
- Light provides the energy needed for photosynthesis.
- As the light level is raised, the rate of photosynthesis increases steadily - but only up to a certain point.
- Beyond that, it won't make any difference because then it'll be the temperature or the carbon dioxide level which is the limiting factor.
- In the lab or in a greenhouse, you can change the light intensity by moving lamps closer to or further away from your plant.
- Too little carbon dioxide also slows down the rate of photosynthesis
- Carbon dioxide is one of the raw materials needed for photosynthesis.
- As with light intensity, the amount…