1. Bonus #2 is due F 3/21

2. Circadian Rhythms: daily patterns set by light
(northern flying squirrel)
CB 48.25

3. Action spectrum of photosynthesis
CB 10.9

4. Seedling germination may depend on light
CB 39.18

5. Phytochrome: a reversible receptor
CB 39.20

7. Phytochrome sets the circadian clock
(oxalis)
(sunflower tracking)

8. The molecular identity of the circadian clock is unknown

9. CCA1 is a transcription factor that regulates some photosynthetic genes.

10. Overexpression of CCA1 in transgenic Arabidopsis plants abolished the circadian rhythms of several genes with dramatically different phases.

11. Plants were created that lack a functional CCA1 gene

12. With no CCA1 protein, phytochrome induction of Lhcb RNA is reduced to 60% of the normal level.

15. Plants overexpressing CCA1 had delayed flowering
Plants overexpressing CCA1 had delayed flowering. Furthermore, leaf movement rhythms were abolished

16. Hey, want to swap some pollen?

17. I don’t have any flowers.

18. I guess I will have to find another plant.

19. I hate when that happens. You give really good pollen.

20. Plants use day length to synchronize flowering
CB 39.22

21. The critical period is actually night length
CB 39.22

22. Phytochrome regulates flowering time
CB 39.23

23. Hormonal regulation of flowering time
Exposed to flower inducing photoperiod
NOT exposed to flower inducing photoperiod
CB 39.24

24. CB 36.13
Water moves from the ground through roots into the shoot and out stomata in the leaves.

25. What happened to this root?
CB 39.28

26. Bonus #2 is due F 3/21
For W Fraken-plants (CB concept 38.4)