Figure 1. Global transcript profiles in the roots of salt-shocked C. tagal seedlings.

A. The distribution spectrum of the RTQ (Relative Transcript Quantity) values of the whole set of investigated genes. The RTQ is defined as the log₂-transformed fold change associated with each probe on the microarray chip. The RTQ values are ranked along the Y-axis, the box encloses those values between the 25^th and 75^th percentiles (the lower and upper quartiles, respectively), and the values between the 95^th and 5^th percentiles are enclosed by the up and down bars. The line near the middle of the box indicates the median value (the 50^th percentile). The circles indicate the outliers. B. Overview of the entire hierarchical clustering of the probes at all five time points. The heat maps display the transcript profiles by the log₂-transformed fold changes on a color scale from green, indicating lower expression, to red, indicating higher expression, interpolated over black for the log₂ (intensity ratio) = 0. Both the stress time points and probes/genes were clustered based on Euclidean distances.