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plant nutrition - Coggle Diagram
plant nutrition
Leaf Structure
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Spongy Mesophyll Layer: irregularly shaped cells which create air spaces to allow gaseous exchange to take place; do not contain many chloropasts
Xylem: vessel which transports water and dissolved minerals. Has lignified walls made out of cellulose
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Stomata: little holes that opens and closes to allow gaseous exchange to take place. The stomata closes to prevent water loss and opens to let gases come in and out.
When the guard cells lose water, the stoma close, while the stoma open when guard cells gain water and swell
photosynthesis
endothermic reaction in which sunlight is transferred to chemical energy in the chloroplasts in a plant
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plants are autotrophs and producers, meaning they not only make their own food, they can make complex molecules from simple molecules
this energy is used to
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Produce amino acids (used to make proteins) when combined with nitrogen and other mineral ions absorbed by roots
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Limiting Factors
Temperature
As temperature increases, that rate of photosynthesis increases until it reaches optimum temperature of forty degrees Celsius,
Light Intensity
It can become a limiting factor, but gradually, increasing the amount of light after a certain point has no effect on the rate.
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Mineral Requirements
Nitrogen
Deficiency: small plant, slow growth, top leaves pale, bottom leaves dead, root and slightly affected
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Magnesium
Deficiency: plant lack chlorophyll, leaves yellow but normal roots
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