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Record information and status
Record ID
Date of creation
2012-08-02 14:28 UTC (dina.abdelhakim@cbd.int)
Date of last update
2012-08-02 15:43 UTC (dina.abdelhakim@cbd.int)
Date of publication
2012-08-02 15:43 UTC (dina.abdelhakim@cbd.int)

General Information
Clone history shapes Populus drought responses.
Sherosha Raj, Katharina Bräutigam, Erin T. Hamanishi, Olivia Wilkins, Barb R. Thomas, William Schroeder, Shawn D. Mansfield, Aine L. Plant, and Malcolm M. Campbell
Author’s contact information
Malcolm M. Campbell

Department of Biological Sciences,
University of Toronto Scarborough,
Toronto, ON, Canada M1C 1A4

E-mail: malcolm.campbell@utoronto.ca.
  • English
Publication date
Summary, abstract or table of contents

Just as animal monozygotic twins can experience different environmental conditions by being reared apart, individual genetically identical trees of the genus Populus can also be exposed to contrasting environmental conditions by being grown in different locations. As such, clonally propagated Populus trees provide an opportunity to interrogate the impact of individual environmental history on current response to environmental stimuli. To test the hypothesis that current responses to an environmental stimulus, drought, are contingent on environmental history, the transcriptome- level drought responses of three economically important hybrid genotypes-DN34 (Populus deltoides × Populus nigra), Walker [P. deltoides var. occidentalis × (Populus laurifolia × P. nigra)], and Okanese [Walker × (P. laurifolia × P. nigra)]-derived from two different locations were compared. Strikingly, differences in transcript abundance patterns in response to drought were based on differences in geographic origin of clones for two of the three genotypes. This observation was most pronounced for the genotypes with the longest time since establishment and last common propagation. Differences in genome-wide DNA methylation paralleled the transcriptome level trends, whereby the clones with the most divergent transcriptomes and clone history had the most marked differences in the extent of total DNA methylation, suggesting an epigenomic basis for the clone history-dependent transcriptome divergence. The data provide insights into the interplay between genotype and environment in the ecologically and economically important Populus genus, with implications for the industrial application of Populus trees and the evolution and persistence of these important tree species and their associated hybrids.
Thematic areas
  • Scientific and technical issues
    • Risk assessment
Background material to the “Guidance on risk assessment of living modified organisms”
Is this document is recommend as background material for the “Guidance on Risk Assessment of Living Modified Organisms”
Section(s) of the “Guidance on Risk Assessment of Living Modified Organisms” this background material is relevant
Additional Information
Type of resource
  • Article (journal / magazine / newspaper)
doi: 10.1073/pnas.1103341108
Publisher and its location
National Academy of Sciences
Copyright © 2012 by the National Academy of Sciences
6 page PDF
Proc Natl Acad Sci U S A. 2011 July 26; 108(30): 12521-12526.
Keywords and any other relevant information
Keywords: epigenetics, forest trees, poplar
Access to the resource