Figure 2. Impact of sulphuric acid scarification on PA contents of S. Sebiferum seed coat.

Seeds of S. Sebiferum were dipped in concentrated sulphuric acid for 10, 20, 30, 40, 50 and 60 min separately. PA contents of acid-scarified seeds were determined by vanillin assay. Data shown are means ± SD (n = 3). Means with different letters are significantly different at P < 0.05 using Tukey’s HSD post hoc test.