Fig. 9

The relative expression of the PbPOD gene in response to abscisic acid (ABA) hormonal stress was measured using quantitative PCR (qPCR). The results were normalized using an internal control, specifically the tubulin gene. The standard error (SE) represented by the error bars is based on three biological replicates. **Signifcant diference (P < 0.01), *signifcant diference at P < 0.05