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Genetic and physiological basis of adaptive salt tolerance divergence between coastal and inland Mimulus guttatus.

Publication ,  Journal Article
Lowry, DB; Hall, MC; Salt, DE; Willis, JH
Published in: The New phytologist
August 2009

Local adaptation is a well-established phenomenon whereby habitat-mediated natural selection drives the differentiation of populations. However, little is known about how specific traits and loci combine to cause local adaptation. Here, we conducted a set of experiments to determine which physiological mechanisms contribute to locally adaptive divergence in salt tolerance between coastal perennial and inland annual ecotypes of Mimulus guttatus. Quantitative trait locus (QTL) mapping was used to discover loci involved in salt spray tolerance and leaf sodium (Na(+)) concentration. To determine whether these QTLs confer fitness in the field, we examined their effects in reciprocal transplant experiments using recombinant inbred lines (RILs). Coastal plants had constitutively higher leaf Na(+) concentrations and greater levels of tissue tolerance, but no difference in osmotic stress tolerance. Three QTLs contributed to salt spray tolerance and two QTLs to leaf Na(+) concentration. All three salt-spray tolerance QTLs had a significant fitness effects at the coastal field site but no effects inland. Leaf Na(+) QTLs had no detectable fitness effects in the field. * Physiological results are consistent with adaptation of coastal populations to salt spray and soil salinity. Field results suggest that there may not be trade-offs across habitats for alleles involved in local salt spray adaptations.

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Published In

The New phytologist

DOI

EISSN

1469-8137

ISSN

1469-8137

Publication Date

August 2009

Volume

183

Issue

3

Start / End Page

776 / 788

Related Subject Headings

  • Soil
  • Sodium
  • Seeds
  • Seawater
  • Salt Tolerance
  • Quantitative Trait Loci
  • Plant Shoots
  • Plant Leaves
  • Plant Biology & Botany
  • Mimulus
 

Citation

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Lowry, D. B., Hall, M. C., Salt, D. E., & Willis, J. H. (2009). Genetic and physiological basis of adaptive salt tolerance divergence between coastal and inland Mimulus guttatus. The New Phytologist, 183(3), 776–788. https://doi.org/10.1111/j.1469-8137.2009.02901.x
Lowry, David B., Megan C. Hall, David E. Salt, and John H. Willis. “Genetic and physiological basis of adaptive salt tolerance divergence between coastal and inland Mimulus guttatus.The New Phytologist 183, no. 3 (August 2009): 776–88. https://doi.org/10.1111/j.1469-8137.2009.02901.x.
Lowry DB, Hall MC, Salt DE, Willis JH. Genetic and physiological basis of adaptive salt tolerance divergence between coastal and inland Mimulus guttatus. The New phytologist. 2009 Aug;183(3):776–88.
Lowry, David B., et al. “Genetic and physiological basis of adaptive salt tolerance divergence between coastal and inland Mimulus guttatus.The New Phytologist, vol. 183, no. 3, Aug. 2009, pp. 776–88. Epmc, doi:10.1111/j.1469-8137.2009.02901.x.
Lowry DB, Hall MC, Salt DE, Willis JH. Genetic and physiological basis of adaptive salt tolerance divergence between coastal and inland Mimulus guttatus. The New phytologist. 2009 Aug;183(3):776–788.
Journal cover image

Published In

The New phytologist

DOI

EISSN

1469-8137

ISSN

1469-8137

Publication Date

August 2009

Volume

183

Issue

3

Start / End Page

776 / 788

Related Subject Headings

  • Soil
  • Sodium
  • Seeds
  • Seawater
  • Salt Tolerance
  • Quantitative Trait Loci
  • Plant Shoots
  • Plant Leaves
  • Plant Biology & Botany
  • Mimulus