Table III.

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

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 < 0.05; ***, P < 0.01. Significantly different values for identical treatments were classified into groups a and b, as indicated by the respective letter.

Sorbitol	Wild Type	γ-TMT:RNAi-55		HPT:RNAi-28
mm	mg Fresh Weight	mg Fresh Weight	% Wild Type	mg Fresh Weight	% Wild Type
0	1.76 ± 0.38a	1.65 ± 0.36a	93.8 ± 20.6	1.47 ± 0.27a	83.6 ± 15.2
100	1.38 ± 0.15a	1.36 ± 0.11a	98.5 ± 8.43	1.22 ± 0.11a	88.6 ± 8.21
200	0.84 ± 0.08a	0.97 ± 0.10a	115.5 ± 12.8	0.77 ± 0.09a	91.5 ± 11.1
300	0.22 ± 0.08a	0.64 ± 0.17b**	262.5 ± 65.1	0.21 ± 0.07a	93.6 ± 34.6
400	0.17 ± 0.07a	0.42 ± 0.05b***	224.2 ± 23.7	0.13 ± 0.04a	78.2 ± 26.1