Fig. 4. ABA-responsive gene expression in abi1-1. The normalized abundances in ppm for the treated abi1-1 sample were plotted against those for the untreated abi1-1 sample. Representation is as described for Fig. 1. Displayed signatures were selected on the basis of either being upregulated (left panel) or downregulated (right panel) in WT following ABA treatment (c.f. Fig. 1, signatures in green above the diagonal and below the diagonal, respectively).