Fig. 5.

Activities of mutated 337 bp BvNHX1 promoter fragments. a Putative cis-acting elements in the S5 promoter fragment. Sites in forward or reverse modes are marked above and below the line, respectively. Mutated sequences are marked by asterisks. b GUS activity was assayed in homogenates made from five homozygous lines of Arabidopsis containing S5::GUS constructs with the indicated mutations (see also Table 1). Seeds were sowed on 0.5× MS (white bars) supplemented with 50 mM NaCl (black bars) or 100 mM mannitol (dashed bars), and seedlings harvested and analyzed 2 weeks later