Performance of LHP1-RNAi hairy roots and the aerial part of soybean plants in response to salt stress. A, Expression level of LHP1-1 and LHP1-2 genes in transgenic hairy roots. B, Performance of transgenic hairy roots after salt treatment. Soybean seedlings with transgenic hairy roots were treated with 100 mm NaCl for 3 d. Hairy roots in water were used as controls. C, Relative growth rate of LHP1-RNAi hairy roots after salt stress. Bars indicate se (n = 30). Asterisks indicate significant difference (**P < 0.01) compared to control hairy roots (K599). D, Performance of the aerial part of soybean plants with transgenic hairy roots after salt stress. Plants in water were used as controls. E, Enlargement of the parts indicated in (D) to show the performance of soybean leaves after salt stress. F, Relative electrolyte leakage in leaves of soybean with transgenic roots. Bars indicate sd (n = 10). Asterisks indicate significant difference (**P < 0.01) compared to leaves of control plants (K599).