Figure 1.

Expression of ARR5, ARR6, ARR7, and ARR15 in response to cold in type B arr mutants compared with that in the wild-type plants. Eleven-day-old light-grown seedlings were treated for 2 h at 1°C, and total RNA isolated was subjected to quantitative RT-PCR. CBF1 was employed to verify cold-inducible gene expression. Relative fold changes were plotted after normalization to ACTIN7 RNA. Mean values and se from triplicate biological experiments are plotted.