Figure 2.

Unsupervised hierarchical clustering analysis suggests various modes of regulation by CN. (a) Hierarchical clustering distinguishes three main responses: C alone, N alone and C+N. (b) Hierarchical clustering of the gene expression patterns reveals different modes of regulation. Three representative gene expression patterns in response to the CN treatments are shown. The mean expression ± 95% confidence interval of the mean for all genes in the cluster is plotted.