Fig 5. qRT-PCR analysis of the effect of genistein in the expression level of exoA, exoK and exoY2 expression in S. fredii HH103 and its nodD1 and nolR mutant derivatives in early (24 h) and late (96 h) stationary phase cultures.

(-) and (+) denote the absence and presence of genistein respectively. The presence of an asterisk denotes a significant difference at the 1% level with respect to the expression level in the wild type strain grown in the absence of genistein.