  We present a study of the integrated properties of the 835 galaxies in the
CALIFA survey. To derive the main physical parameters of the galaxies we have
fitted their UV-to-IR spectral energy distributions (SED) with sets of
theoretical models using CIGALE. We perform a comparison of the integrated
galaxy parameters derived from multi-band SED fitting with those obtained from
modelling the Integral Field Unit (IFU) spectra and show the clear advantage of
using the SED-derived star formation rates (SFR). A detailed analysis of
galaxies in the SFR/Mstar plane as a function of their properties reveals that
quenching of star formation is caused by a combination of gas deficiency and
the inefficiency of the existing gas to form new stars. Exploring the plausible
mechanisms that could produce this effect, we find a strong correlation with
galaxy morphology and the build-up of central bulge. On the other hand, the
presence of AGN and/or a stellar bar, as well as the local environment have
only temporal effects on the current star formation, a result also consistent
with their model-derived star formation histories.
