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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.
