LightQualityShadeGrowth

LightQualityShadeGrowth - What did they measure?...

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Before mechanism… Why might it be important, in an evolutionary sense, for a plant to be able to sense rel. amt. of red and far-red light? Another example of the importance of light QUALITY = ratio of red to far-red light . Many plant processes are sensitive to this ratio Far-red Red, Blue Green Uh-oh. Far-red Ahhh!
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Species from sunny habitat Species from shady habitat All have normal light Like shade Like open + HIGH MEDIUM NO far-red far-red Additional far-red Morgan and Smith Does the ratio of red:far-red light influence plant growth? Does this depend on where the plant is from?
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Unformatted text preview: What did they measure? Chenopodium Teucrium 0.10 0.08 0.06 0.04 0.02 Deep shade Open sun Open sun Deep shade 0.10 0.08 0.06 0.04 0.02 Rate of stem elongation ( log cm/day) 1. Plants from sunny habitats More Less FAR-RED Rate stem growth More Less FAR-RED 2. Plants from shady habitats iClicker Predictions! Discuss this with your neighbor: A B C A B C Morgan and Smith Does the ratio of red:far-red light influence plant growth? Does this depend on where the plant is from?...
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LightQualityShadeGrowth - What did they measure?...

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