Expression of cold-inducible genes in wild type and atcsp3-2 mutant plants. Northern blot analysis with total RNA (10 μg) from 10-day-old seedlings that were treated with cold (4 °C) for the indicated times periods. Ethidium bromide-stained rRNA was used as a loading control. A, transcript levels of COR15A, COR47, LTI78, KIN1, and ZAT12 in wild type and atcsp3-2 mutant plants. B, transcript levels of CBF/DREB1 genes in wild type and atcsp3-2 mutant.