Figure 2. Histochemical localization of GUS activity in transgenic PStSN1::GUS Arabidopsis plants. Seedlings grown in MSG medium were collected at 4 days (a) or 8 days after seed germination (b); representative young fully expanded leaf of a 20-days-old transgenic plant grown on soil (c); immature floral buds (d); young flower; (e) mature flower (f); old flower (g); stamen (h); stigma (i); ovary (j); base flower (k); matured siliques with untreated seeds (m); mechanically wounded stained seeds (l) and root (n). (j), (k) and (n) are differential interference contrast (DIC) images.