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PLoS Genet. 2013;9(9):e1003760. doi: 10.1371/journal.pgen.1003760. Epub 2013 Sep 5.

Plasticity regulators modulate specific root traits in discrete nitrogen environments.

Author information

1
Center for Genomics and Systems Biology, Department of Biology, New York University, New York, New York, United States of America ; School of Life Sciences, University of Warwick, Coventry, United Kingdom ; Warwick Systems Biology Centre, University of Warwick, Coventry, United Kingdom.

Abstract

Plant development is remarkably plastic but how precisely can the plant customize its form to specific environments? When the plant adjusts its development to different environments, related traits can change in a coordinated fashion, such that two traits co-vary across many genotypes. Alternatively, traits can vary independently, such that a change in one trait has little predictive value for the change in a second trait. To characterize such "tunability" in developmental plasticity, we carried out a detailed phenotypic characterization of complex root traits among 96 accessions of the model Arabidopsis thaliana in two nitrogen environments. The results revealed a surprising level of independence in the control of traits to environment - a highly tunable form of plasticity. We mapped genetic architecture of plasticity using genome-wide association studies and further used gene expression analysis to narrow down gene candidates in mapped regions. Mutants in genes implicated by association and expression analysis showed precise defects in the predicted traits in the predicted environment, corroborating the independent control of plasticity traits. The overall results suggest that there is a pool of genetic variability in plants that controls traits in specific environments, with opportunity to tune crop plants to a given environment.

PMID:
24039603
PMCID:
PMC3764102
DOI:
10.1371/journal.pgen.1003760
[Indexed for MEDLINE]
Free PMC Article
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