Photoperiodism ·
Reading the Length of Night
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seel
.com · phytochrome · critical night · florigen
Night length
0 h
Active P
fr
100%
Phase
—
daylight (P
fr
high)
night (P
fr
decays)
critical-night threshold
short-day plant (flowers in long night)
long-day plant (flowers in short night)
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.com · Photoperiodism