Figure 3From: Natural variation in CBF gene sequence, gene expression and freezing tolerance in the Versailles core collection of Arabidopsis thalianaExpression of the CBF genes over 24 hours in the cold. Kinetics of induction of CBF1, 2 and 3 by cold. RNA was prepared by protocol 2 (see Methods) and PCR was performed on the ABI 7900 HT platform. For each gene, seven accessions were analyzed by Q-PCR: 157 AV (Ita-0), 163 AV (Can-0), 166 AV (Cvi-0), 186 AV (Col-0), 229 AV (Rld-2), 231 AV (Rub-1), and 233 AV (Sah-0). Sensitive accessions are in red and tolerant ones in blue. Time points shown are 1 h, 3 h, 6 h and 24 h after transfer to 5°C. Average standard errors in the determination of the expression of the different genes varied between 0.38 Ct and 0.47 Ct.Back to article page