Latitudinal Varitation in Cold Hardiness in Introduced Tamarix and Native Populus
Friedman, J. M., Roelle, J. E., Gaskin, J. F., Pepper, A. E., and Manhart, J. R. Evolutionary Applications 1:598-607. 2008.To investigate the evolution of clinal variation in an invasive plant, we compared cold hardiness in the introduced saltcedar (Tamarix ramosissima, Tamarix chinensis, and hybrids) and the native plains cottonwood (Populus deltoides subsp. monilifera). In a shadehouse in Colorado (41N), we grew plants collected along a latitudinal gradient in the central United States (29–48N). On 17 occasions between September 2005 and June 2006, we determined killing temperatures using freeze-induced electrolyte leakage and direct observation.
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Author(s): Jonathan M. Friedman, James E. Roelle, John F. Gaskin, Alan E. Pepper, James R. Manhart
Section: Seedling Physiology and Morphology
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