The growth of bulges and discs in relatively HI-rich galaxies:
  indication from HI scaling relations
  We study the relation between the properties of the bulge/disc components and
the HI mass fraction of galaxies. We find that at fixed stellar mass, disc
colours are correlated with the HI mass fraction, while bulge colours are not.
The lack of a correlation between the bulge colour and the HI mass fraction is
regardless whether the bulges are pseudo, or whether the galaxies host bars or
are interacting with a neighbour. There is no strong correlation between the
colours of the discs and bulges either. These results suggest that the current
total amount of HI is closely related to the formation of discs, but does not
necessarily fuel the formation of (pseudo) bulges in an efficient way. We do
not find evidence for the star formation in the discs to be quenched by the
bulges.
