Figure 3.

Root type-specific gene activity in pericycle cells of maize. A, Venn diagram illustrating the overlap of active genes in pericycle cells of the four root types under homogenous low nitrate or local high nitrate conditions. B, Overview of gene activity patterns and numbers of genes with these patterns in pericycle cells of the four maize root types grown under homogenous low nitrate or local high nitrate conditions. Each colored cell represents a root type-specific gene activity and states the number of active genes. Columns represent patterns under local high nitrate condition, while rows represent expression patterns under homogenous low nitrate condition. Increase of root type-specific gene activity patterns in pericycle cells after local high nitrate stimulus is indicated above the dashed diagonal red line, while increase of such patterns under homogenous low nitrate conditions is summarized below the dashed red line. PR, primary root; SR, seminal root; CR, crown root; BR, brace root.