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. 2011 Sep 21;63(1):293–304. doi: 10.1093/jxb/err279

Fig. 3.

Fig. 3.

Freezing tolerance of acex mutants showing reduced induction of CBF2 in response to low temperature. Non-acclimated and cold-acclimated (7 d, 4 °C) 3-week-old WT and mutant (acex55 and acex506) plants were exposed to different freezing temperatures for 6 h. Freezing tolerance was estimated as the percentage of plants surviving each specific temperature after 10 d of recovery under control conditions. (A) Freezing tolerance of non-acclimated plants. (B) Freezing tolerance of cold-acclimated plants. (C) Representative non-acclimated WT and acex55 plants 10 d after being exposed to –7 °C for 6 h. (D) Representative cold-acclimated WT and acex55 plants 10 d after being exposed to –10 °C for 6 h. In A and B, data are expressed as the means of three independent experiments with at least 50 plants each. Bars indicate the SE.