Photosynthesis
- Created by: chelsey866
- Created on: 06-03-14 20:25
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- Plant structure and photosynthesis
- Plants are made up of tissues and organs
- Plants are made of organs like stems, roots and leaves
- Leaves are made of these tissues:
- Epidermal tissue: covers the whole plant
- MESOPHYLL TISSUE is where most of the photosynthesis in a plant occurs
- XYLEM AND PHLOEM TISSUE VESSELS: transport substances around the plant
- Photosynthesis makes sugar using sunlight
- Photosynthesis is the process that makes food (glucose) in plants and algae
- Photosynthesis happens inside the chloroplasts
- Chloroplasts contain a green substance called chlorophyll
- Chlorophyll absorbs energy from sunlight
- The energy is used to turn carbon dioxide and water into glucose
- Oxygen is also made as by-product (it's not the main product)
- The rate of photosynthesis
- The rate of photosynthesis depends on:
- How much light there is
- The amount of C02
- The temperature
- A limiting factor is something that stops photosynthesis from going any faster. e.g.
- At night, light is the limiting factor
- In winter, it's often temperature that's limiting factor
- If it's warm enough and bright enough then carbon dioxide will be the limiting factor
- The rate of photosynthesis depends on:
- GRAPHS 4 PHOTO-SYNTHESIS
- Too little light slows rate down
- At first, the more light there is, the faster photosynthesis happens
- This means the rate of photosynthesis depends on the amount of light
- After a certain point the graph flattens out. Photosynthesis wont go any faster
- This is because light is no longer the limiting factor. Now the temp or amount of C02 is the limiting factor
- At first, the more light there is, the faster photosynthesis happens
- Too little C02 also slows it down
- The more C02 there is the faster photosyn happens
- This means the amount of CO2 is the limiting factor
- After a certain point, photsynthesis wont go any faster cause C02 is no longer the limiting factor
- This means the amount of CO2 is the limiting factor
- The more C02 there is the faster photosyn happens
- If there's plently of light+ CO2 then it must be the temp thats the limiting factor
- Too little light slows rate down
- Plants are made up of tissues and organs
- Carbon dioxide+water ----> glucose+oxygen
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