TABLE 3.

Transcriptional response of ppk and ppx promoters to osmotic stress (2 M NaCl) after 30 min and after 2 h

Promoter type and stress condition	β-Galactosidase sp act (mean ± SD) after:
	30 min		2 h
	Log phase	Stationary phase	Log phase	Stationary phase
ppk without NaCl	197 ± 5	225 ± 22	201 ± 6	265 ± 47
ppk with NaCl	305 ± 9	287 ± 17	351 ± 4	851 ± 138
ppx without NaCl	125 ± 5	132 ± 2	134 ± 9	191 ± 11
ppx with NaCl	235 ± 3	172 ± 3	542 ± 2	447 ± 3