Derivatives of naringenin have been synthesized with organometalcarbonyl re
porting groups for IR spectroscopy attached at C-2, C-3', or C-6, and the p
roducts have been tested for the induction of nod gene expression using a R
hizobium leguminosarum strain which contains the Escherichia coil lacZ (bet
a-galactosidase) gene fused to nodABC. Derivatives with an OMe substituent
within the reporting group moiety showed residual gene induction activity.
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