Post on 17-Jan-2016
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Bonus #2 is due F 3/21
CB 48.25
Circadian Rhythms: daily patterns set by light(northern flying squirrel)
Action spectrum of photosynthesis
CB 10.9
CB 39.18
Seedling germination may depend on light
Phytochrome: a reversible receptor
CB 39.20
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)
Phytochrome sets the circadian clock
http://www.mcdb.ucla.edu/Research/Tobin/research.html
http://www.ou.edu/wanglab/Circadian.html
The molecular identity of the circadian clock is unknown
CCA1 is a transcription factor that regulates some photosynthetic genes.
http://www.mcdb.ucla.edu/Research/Tobin/research.html
25 28 31 34 37 40 43 46 49 52 55 57
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
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
http://www.mcdb.ucla.edu/Research/Tobin/research.html
Plants overexpressing CCA1 had delayed flowering. Furthermore, leaf movement rhythms were abolished
Hey, want toswap some
pollen?
I don’t haveany flowers.
I guess I willhave to find
another plant.
I hate whenthat happens.
You give reallygood pollen.
CB 39.22
Plants use day length to synchronize flowering
CB 39.22
The critical period is actually night length
CB 39.23
Phytochrome regulates flowering time
CB 39.24
Hormonal regulation of flowering time
Exposed to flower inducing photoperiod
NOT exposed to flower inducing
photoperiod
CB 36.13
Water moves from the ground through roots into the shoot and out stomata in the leaves.
CB 39.28
What happened to this root?
•Bonus #2 is due F 3/21•For W Fraken-plants (CB concept 38.4)