Upper panel: specific star formation rate against Hi deficiency for Virgo SFDs. Crosses denote the average value in each bin of Def_HI. Lower panel: specific star formation rates versus stellar masses. Blue symbols correspond to the Virgo SFDs, with the different shapes indicating the atomic hydrogen content of the galaxies as given by the Hi deficiency parameter. Symbols of comparison samples are the same used in Fig. 5. The dotted line indicates the star formation sequence defined by Schiminovich et al. (2007).