The rate of photosynthesis

Mind Map by , created over 5 years ago

this is just some key information about photosynthesis that are very important and you should learn them very well

Created by Karolina over 5 years ago
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The rate of photosynthesis
1 The limiting factor depends on the conditions
1.1 1. which is limiting at a particular time depends on the environment conditions:
1.1.1 -at night the light is the limiting factor -in winter the temperature is the limiting factor -if its warm enough and bright enough the amount of carbon dioxide is usually limiting
2 An experiment can be done to work out the ideal conditions for photosynthesis in a particular plant
2.1 for example you can use a canadian ponweed
2.1.1 You would measure the amount of oxygen produced in a given time to show how fast photosynthesis is happening Oxygen is produced during photosynthesis Count the bubbles given off, or to be more accurate collect the oxygen in a gas syringe
3 There are three important graphs for rate of photosynthesis
3.1 1. Not enough light slows down the rate of photosynthesis
3.1.1 Light= energy needed for photosynthesis. As the light levels raise the rate of photosynthesis increases but only to a certain point Beyond that certain point the amount of light will not make a difference because it would be the temperature or the CO2 levels which are the limiting factors In a lab you can move a lamp closer to the plant to increase the rate of photosynthesis If you plot the rate of photosynthesis against the ''distance from the beaker'' you would get a weird shape graph. To get a a nice smooth curve you either need to measure the light intensity at the beaker using a light meter or do some maths with the results
3.2 2.Too little carbon dioxide also slows down the rate of photosynthesis
3.2.1 CO2 is one of the raw materials for photosynthesis CO2 will only increase the rate of photosynthesis to a certain point then it will not longer increase photosynthesis As long as the light and CO2 are available then the limiting factor for photosynthesis is temperature There are different ways to control the amount of CO2 one is to dissolve different amounts of sodium hydrogencarbonate in the water, which gives off CO2

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