Table IV.

Biomass of wild-type and transgenic lines grown on medium supplemented with different concentrations of NaCl

Wild-type (WT), γ-TMT:RNAi-55, and HPT:RNAi-28 tobacco plants were treated with the sorbitol and NaCl concentrations indicated. Four weeks after the onset of sorbitol and NaCl stress, biomass production from stressed plants was determined. The depicted data are the means and sds of four independent measurements. *, P < 0.10; **, P < 0.05; and ***, P < 0.01. Significantly different values for identical treatments were classified into groups a and b, as indicated by the respective letter.

NaCl	Wild Type	γ-TMT:RNAi-55		HPT:RNAi-28
mm	mg Fresh Weight	mg Fresh Weight	% Wild Type	mg Fresh Weight	% Wild Type
0	1.61 ± 0.16a	1.48 ± 0.30a	92.1 ± 19.1	1.42 ± 0.29a	91.1 ± 18.9
100	1.38 ± 0.10a	1.29 ± 0.12a	93.2 ± 8.87	1.25 ± 0.13a	92.7 ± 9.4
200	1.03 ± 0.11a	0.87 ± 0.08ab	84.5 ± 8.55	0.71 ± 0.06b**	73.9 ± 8.6
300	0.92 ± 0.17a	0.68 ± 0.09b*	73.8 ± 14.2	0.56 ± 0.06b***	60.8 ± 7.1
400	0.58 ± 0.11a	0.38 ± 0.08b*	64.6 ± 15.2	0.34 ± 0.06b**	63.3 ± 13.7