Observed transcriptional response of genes containing the ICEr3 (HACACGT), ICEr4 (HCCACGT), HOS9r1 (ACGCGT), DRE (RCCGAC), ICEr1 (CACATG), and ABRE (GACACGT) elements in their 500 bp promoters to cold (0°C) treatment in wild-type and ice1 Arabidopsis backgrounds (using microarray data published in Lee et al., 2005). The number of genes induced by the treatment was compared to the expected frequency, based on the percentage of all present cold-responding genes on the chip. Statistically significant difference was assessed by χ2 test: ** = P < 0.01. A, ICEr3-containing induced genes. B, ICEr4-containing induced genes. C, HOS9r1-containing induced genes. D, DRE-containing induced genes. E, ICEr1-containing induced genes. F, ABRE-containing induced genes.