Fig. 3
GmSULTR1;2b gene expression pattern in response to sulfur availability. (a) Real-time RT-PCR of the expression level of GmSULTR1;2b in different tissues of soybean plants treated for 10 days with 0 mM (−S) or 0.5, 1.0, and 1.5 mM MgSO4 (+S). (b) GUS staining of transgenic soybean hairy roots containing the GmSULTR1;2b promoter::GUS fusion protein, which was transformed into soybean cotyledons by A. rhizogenes. Error bars represent the standard deviation