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Review
. 2014 Oct;166(2):518-27.
doi: 10.1104/pp.114.244749. Epub 2014 Aug 7.

Natural Variation of Root Traits: From Development to Nutrient Uptake

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Free PMC article
Review

Natural Variation of Root Traits: From Development to Nutrient Uptake

Daniela Ristova et al. Plant Physiol. .
Free PMC article

Abstract

The root system has a crucial role for plant growth and productivity. Due to the challenges of heterogeneous soil environments, diverse environmental signals are integrated into root developmental decisions. While root growth and growth responses are genetically determined, there is substantial natural variation for these traits. Studying the genetic basis of the natural variation of root growth traits can not only shed light on their evolution and ecological relevance but also can be used to map the genes and their alleles responsible for the regulation of these traits. Analysis of root phenotypes has revealed growth strategies and root growth responses to a variety of environmental stimuli, as well as the extent of natural variation of a variety of root traits including ion content, cellular properties, and root system architectures. Linkage and association mapping approaches have uncovered causal genes underlying the variation of these traits.

Figures

Figure 1.
Figure 1.
Tissue architecture and natural variation of the root of Arabidopsis. A, The Arabidopsis root and its developing tissues. Schematic of a young Arabidopsis root (center). The developmental zones of the PR tip and its tissue architecture (left) and LR primordium (right). Different tissue types are indicated by different colors. B, Natural variation of root growth. Graphical depiction of 10-d-old seedlings of 13 divergent Arabidopsis accessions grown at the same time on 0.2-strength MS.

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