Bonus #2 is due F 3/21
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Bonus #2 is due F 3/21. Circadian Rhythms: daily patterns set by light (northern flying squirrel). CB 48.25. Action spectrum of photosynthesis. CB 10.9. Seedling germination may depend on light. CB 39.18. Phytochrome: a reversible receptor. CB 39.20.

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Circadian Rhythms: daily patterns set by light

(northern flying squirrel)

CB 48.25






Phytochrome sets the circadian clock

http://www.mcdb.ucla.edu/Research/Tobin/research.html

http://plantsinmotion.bio.indiana.edu/plantmotion/movements/leafmovements/clocks.html (oxalis)

http://plantsinmotion.bio.indiana.edu/plantmotion/movements/tropism/tropisms.html (sunflower tracking)


The molecular identity of the circadian clock is unknown

http://www.ou.edu/wanglab/Circadian.html


CCA1 is a transcription factor that regulates some photosynthetic genes.

25 28 31 34 37 40 43 46 49 52 55 57

http://www.mcdb.ucla.edu/Research/Tobin/research.html


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

http://www.mcdb.ucla.edu/Research/Tobin/research.html


Plants were created that lack a functional CCA1 gene abolished the circadian rhythms of several genes with dramatically different phases.

http://www.mcdb.ucla.edu/Research/Tobin/research.html


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

http://www.mcdb.ucla.edu/Research/Tobin/research.html


http://www.mcdb.ucla.edu/Research/Tobin/research.html reduced to 60% of the normal level.


http://www.mcdb.ucla.edu/Research/Tobin/research.html reduced to 60% of the normal level.


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


Hey, want to Furthermore, leaf movement rhythms were abolishedswap somepollen?


I don’t have Furthermore, leaf movement rhythms were abolishedany flowers.


I guess I will Furthermore, leaf movement rhythms were abolishedhave to findanother plant.


I hate when Furthermore, leaf movement rhythms were abolishedthat happens.

You give reallygood pollen.


Plants use day length to synchronize flowering Furthermore, leaf movement rhythms were abolished

CB 39.22


The critical period is actually night length Furthermore, leaf movement rhythms were abolished

CB 39.22


Phytochrome regulates flowering time Furthermore, leaf movement rhythms were abolished

CB 39.23


Hormonal regulation of flowering time Furthermore, leaf movement rhythms were abolished

Exposed to flower inducing photoperiod

NOT exposed to flower inducing photoperiod

CB 39.24


CB 36.13 Furthermore, leaf movement rhythms were abolished

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


What happened to this root? Furthermore, leaf movement rhythms were abolished

CB 39.28


  • Bonus #2 is due F 3/21 Furthermore, leaf movement rhythms were abolished

  • For W Fraken-plants (CB concept 38.4)


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