Figure 1.

Expression levels of 7 genes regulating epigenetic modifications (AGO, BSH, CLF, DCL, DNM, H12 and HDA) and 5 genes regulating cell response to stress (APX, CCO, HSP, SOD, WKY) in maritime pine proliferating embryogenic masses. Data are mean ± SE of four EMs lines (from two mother trees, B5 and B14), that derived from priming at 37 °C × 7 d (P37, orange bars) or at 50 °C × 3 h (P50, red bars), as compared to control EMs induced at 23 °C (NP, grey bars). Gene names are described in Table 3; TUB was used as reference gene.