Plants, Phytochromes and Light

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Which type of phytochrome is biologically active?
Pfr (Far red)
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Which type of phytochrome is more stable?
Pr (Red)
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What type of light does Pr absorb and what happens to it when it does this?
Absorbs red light and changes to far Pfr
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What type of light does Pfr absorb and what happens to it when it does this?
Absorbs far red light and changes to Pr
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Does sunlight contain more red light or more far red light?
More red light
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What type of phytochrome is most common in plants in the day?
Pfr
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Why is the conversion of Pfr back to Pr usually slow at night?
Because the intensity of light is very little
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What do scientists think phytochromes might do to plants?
Trigger processes in plants - flowering, leaf fall, etc
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Other cards in this set

Card 2

Front

Which type of phytochrome is more stable?

Back

Pr (Red)

Card 3

Front

What type of light does Pr absorb and what happens to it when it does this?

Back

Preview of the front of card 3

Card 4

Front

What type of light does Pfr absorb and what happens to it when it does this?

Back

Preview of the front of card 4

Card 5

Front

Does sunlight contain more red light or more far red light?

Back

Preview of the front of card 5
View more cards

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