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18 Cards in this Set
- Front
- Back
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amount of light with no cover
full sun= |
2000 umol/mol^2.s
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Photosynthesis depends on what?
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the number f quanta absorbed vs energy
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what is sensible heat
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conductuion and convection to cool air
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study graphs in ch 9
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study graphs
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what 5 things affect light absorption b a leaf
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1. leaf morphology
2. Leaf anatomy 3. Amount of pigment & ration of chl.b/chl.a 4.movemen affecting pigment exposure 5. Canopy laer for plant |
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describe leaf morphology
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surface area, leaf angle, hairs, spines, wax, and salt glands can decrease light absorption
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descripbe leaf anatome
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epidermal and pallisade
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what does epidermal cells focus on
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light
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describe pallisade
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have sieve effect & light channeling
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descvirbe sieve effece
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light is absorbed where there is chloroplasts
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describe light channeling
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between pallisade cells and through vacuole to leaf interio
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what does sieve effect & light channeling do for pallisade
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allow light ti oass through
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describe spongy mesopphyll of plant anatomy
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traps light by light scattering abilities
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what movent affectspigment exposure
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chloroplast movt(long actin)
-leaf mvt=heliotropism(solar tracking) |
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two types of heliotropism solar-tracking leaf
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diaheliotropic (max amt of exposure to light by moving leaves)
-paraheliotropic(minimum exposure) |
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what causes leaf mvt in sun-tracking plants
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pulvinus swellin between blad and petiole
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describe canoy layer for a plant
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provides 50% of light for day and shade light is depleted in red (650-680) and enriched in far red wavelenghts (>700nm)
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what is compensatation point
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photosynthesis rate = respiration rate
CO2 absorbed=CO2 given off |
