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