These studies concluded that there is a transient accumulation of JA associated with progressive accumulation of ABA under drought conditions.This trend, coupled with the fact that both ABA and JA share various transcription factors associated with responses to abiotic stress(Shinozaki and YamaguchiShinozaki, 2007), suggests that there is a cross-talk between ABA and JA in the signaling cascade that is triggered in water-stressed plants. Cytokinins (CKs), which participate in several aspects of plant development (e.g., seed germination,vascular development, meristem function, stimulation of photo-synthesis and of sink strength) and counteract leaf senescence,are often considered as antagonists to ABA (Hare et al., 1999).