  The low frequency radio luminosity is believed to be an indicator of jet
power, while the optical/UV emission is probably from accretion discs in the
nuclei of steep-spectrum radio quasars. We present a correlation between the
ratio of radio to optical luminosities and the continuum spectral index in
blue/UV bands, which might indicate that the continuum shape in blue/UV bands
is related to the ratio of jet to accretion power. The results may imply that
the spectra and structure of accretion discs are probably affected by the
interactions between jets and discs.
