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Plant Nutrition - Coggle Diagram
Plant Nutrition
Photosynthesis
- Photosynthesis is an endothermic reaction in which energy from sunlight is transferred to the chloroplasts in green plants.
- Green plants use this energy to make the carbohydrate glucose from the raw materials carbon dioxide and water.
- At the same time, oxygen is made and released as a waste product.
- Photosynthesis can be defined as the process by which plants manufacture carbohydrates from raw materials using energy from light.
- The process involves the conversion of energy, from light energy to chemical energy
Carbon dioxide + water → Glucose + Oxygen, in the presence of chlorophyll and sunlight
6CO2 + 6H2O → C6H12O6 + 6O2 , in the presence of chlorophyll and sunlight
Uses of Glucose
- Source of energy in respiration
- Converted to sucrose, which is soluble but less reactive than glucose so can easily be transported around the plant in solution. Sucrose is also stored in fruits.
- Converted to starch for storage. Starch is insoluble so can be stored in cells without affecting the water movement in/out of cells.
- Converted to cellulose, a key component of cell walls.
- Used to synthesize lipids, an energy source for seeds
- Used to produce amino acids when combined with nitrogen and other mineral ions absorbed by roots.
Definitions
Endothermic - A chemical reaction that takes in energy from the surroundings, the products are higher in energy than the reactants
Autotroph - Organisms that can make complex molecules (glucose) from simple molecules (carbon dioxide and water)
Producer - Organisms that can make their own food and so are the first organism at the start of all food chains
Photosynthesis - The process by which plants manufacture carbohydrates from raw materials using energy from light
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