Journal
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
Volume 110, Issue 37, Pages 15133-15138Publisher
NATL ACAD SCIENCES
DOI: 10.1073/pnas.1305883110
Keywords
GWAS; morphometrics; GxE interaction; QTL; RootScape
Categories
Funding
- National Science Foundation (NSF) [MCB-0929338]
- NSF [DEB-0917489]
- National Institutes of Health (NIH) [R01 GM032877]
- NIH [R01 GM078279]
- Human Frontier Postdoctoral Fellowship
- Fulbright Science and Technology award
- Marie Curie postdoctoral fellowship, Agence Nationale de Recherches (ANR) [NitroNet: ANR 11 PDOC 020 01]
- Centre National de la Recherche Scientifique
- European Molecular Biology Organization [B/H109502/1]
- Direct For Biological Sciences
- Division Of Environmental Biology [0917489] Funding Source: National Science Foundation
- Direct For Biological Sciences
- Div Of Molecular and Cellular Bioscience [0929338] Funding Source: National Science Foundation
- BBSRC [BB/H019502/1] Funding Source: UKRI
- Biotechnology and Biological Sciences Research Council [BB/H019502/1] Funding Source: researchfish
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Phenotypic plasticity is presumed to be involved in adaptive change toward species diversification. We thus examined how candidate genes underlying natural variation across populations might also mediate plasticity within an individual. Our implementation of an integrative plasticity space approach revealed that the root plasticity of a single Arabidopsis accession exposed to distinct environments broadly recapitulates the natural variation space. Genome-wide association mapping identified the known gene PHOSPHATE 1 (PHO1) and other genes such as Root System Architecture 1 (RSA1) associated with differences in root allometry, a highly plastic trait capturing the distribution of lateral roots along the primary axis. The response of mutants in the Columbia-0 background suggests their involvement in signaling key modulators of root development including auxin, abscisic acid, and nitrate. Moreover, genotype-by-environment interactions for the PHO1 and RSA1 genes in Columbia-0 phenocopy the root allometry of other natural variants. This finding supports a role for plasticity responses in phenotypic evolution in natural environments.
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