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Figure 4. Comparative analysis of cold-induced expression of selected cold acclimation (CA) associated gene homologs (CBF1, ZAT12, COR47, and GolS3). Three test genotypes or species at the extreme ends of the cold-sensitivity gradient, i.e., Solanum commersonii (cold acclimating and freeze tolerant), S. tuberosum cv. Red Pontiac (cold sensitive), and S. trifidum (highly cold sensitive, i.e., chilling sensitive) were compared by quantitative real-time polymerase chain reaction. Relative expression was based on the average obtained from independent biological replicates (±SE, n = 3).
