Jasmonic acid (JA) related pathways may play key roles in drought tolerance in H471. (A) JA synthesis and signaling pathways that contain differentially expression patterns between H471 and HHZ under drought conditions. Gene names in red and green color indicate up- and down-regulated in response to drought stress, respectively. (B) Hierarchical clustering of JA-related genes and some co-regulated genes. The color scale indicates the expression value. (C) JA contents in H471, HHZ, and P28 under drought conditions. Each column represents mean ± s.d. (three replicates); **p <0.01; *p <0.05 versus HHZ (ANOVA, Dunnett’s multiple comparison test).