Figure 4

qRT-PCR expression profile of the putative drought responsive genes in Z. nummularia. Duration of PEG-induced drought stress (in hours) and Fold change in gene expression are shown on X and Y axes, respectively. Ziziphus elongation factor1 (Zjef1) was used as an internal control. The data represents mean values ± SE (n = 3) and vertical lines indicate calculated standard error. The asterisks designate statistical significance between the control and treated seedlings (*P < 0.05; **P < 0.01, ***P < 0.001 and ****P < 0.0001).