Fig. 1.

Semi-quantitative RT-PCR results of vacuolar Na⁺/H⁺ antiporter (OsNHX1) of root and leaf tissues in Pokkali and IR29 (a), plasma membrane Na⁺/H⁺ antiporter (OsHKT2;1) of root and leaf tissues in Pokkali and IR29 (b), and Os18S rRNA of root and leaf tissues in Pokkali and IR29 rice seedlings (c), when exposed to control (0 mM NaCl) and salt stress (200 mM) for 0, 15, 30, 45, 60,180, and 360 min