Von Wettberg, Eric J .
Population differentiation in performance under heavy metal and low Ca:Mg stress in Arabidopsis lyrata.
Toxic soils, such as heavy metal rich and ionic imbalanced serpentinic soils, are thought to impose strong local selection on plants. I examined the growth characteristics of populations of Arabidopsis lyrata from granitic, glacial sand dune, and serpentinic soils grown under high heavy metal concentrations and on low Ca:Mg conditions that simulate aspects of the toxicity of serpentinic soils. After a year growth I found that plants from serpentinic soils grew more rapidly across heavy metal and low Ca:Mg conditions than plants from granitic or sand dune soils, suggesting possible local adaptation to multiple aspects of serpentinic soils. Microarray genotyping of these populations, paired with metabolomic profiling, suggests that the genetic and physiological differences underlying performance differences are due to hundreds of genes.
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1 - University of California, Davis, Section of Evolution and Ecology, One Shields Ave, Storer Hall, Davis, Ca, 95616, USA
Presentation Type: Oral Paper:Papers for Topics
Date: Wednesday, July 30th, 2008
Time: 1:45 PM