Fig. 4.

Expression pattern of Arabidopsis PDI-C gene promoters in seedlings. The GUS staining pattern of PDI7 _pro:GUS (a, d, g, j) PDI12 _pro:GUS (b, e, h, k), and PDI13 _pro:GUS (c, f, i, l) seedlings were examined after 5 days of growth in darkness (a–c), or after 2 weeks of grown under a normal 16 h light, 8 h darkness cycle (d–l). Arrows indicate expression in hydathodes (hy) and stipules (st). The images are representative examples from at least three independent experiments of ≥10 independent transgenic lines per construct. Scale bar 1 mm