MulleinAdaptation

MulleinAdaptation - Plants were smaller at high elevation...

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Important step in studying adaptation = Traits Genetic Environmental Common mullein, An invasive exotic plant from Why is mullein invading high elevation sites at Yosemite National Park? • Has it evolved special traits that allow it to survive on mountains? OR • Is it very plastic, and very good at living in a range of environments?
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Plants were smaller at high elevation. • Is this genetic? • Has there been evolutionary change since introduction? 0 80 120 160 200 0 500 1000 1500 2000 2500 Elevation (m) P = 0.06 Mean plant height (cm) iClicker Jeopardy: What experiment would you do to answer these questions? A. Measure leaf size as well as plant height B. Do genetic analysis on plants from high elevation C. Collect seeds from all elevations and plant them in a garden
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Unformatted text preview: Plants were smaller at high elevation. When grown in a common environment, plants from high elevation were NOT smaller. • Is this genetic? • Has there been evolutionary change since introduction? 80 120 160 200 500 1000 1500 2000 2500 Elevation (m) P = 0.06 Mean plant height (cm) This pattern caused by PLASTICITY. Common garden We also looked at physiological traits, in plants from our common garden. High elevation populations have not rapidly evolved special traits. Expected: Elevation Freezing tolerance Expected: Elevation Reflectance And morphological traits. (Fuzziness: reflectance) Book example= Fig 23.11 (Clausen, Keck, & Heisey)...
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This note was uploaded on 04/06/2008 for the course BIO 20b taught by Professor Dunkin&parker during the Winter '08 term at UCSC.

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MulleinAdaptation - Plants were smaller at high elevation...

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