8.6 Flashcards
1
Q
State the name of the two phytochrome isomers
A
Phytochrome far red and phytochrome red
2
Q
State which conditions causes phytochrome red to become phytochrome far red
A
Red light (full sunlight)
3
Q
State which conditions causes phytochrome far res to become phytochrome red
A
Far red light (darkness)
4
Q
State the differences between a short and a long day plant
A
Short day - flower when day length drops BELOW a certain threshold (dependent on high Pr levels)
Long day - flower when day length rises ABOVE a certain threshold (dependent on high Pfr levels)
5
Q
A long day plant is exposed to red light. Explain how red light causes a change in flowering gene expression in this plant
A
Red light converts Pr into Pfr, long day means more leftover Pfr which acts as a
