Relationship between the star formation rate and the stellar mass for the HRS late-type galaxies. Filled dots are for HI-normal (HI - def ≤ 0.4) field galaxies, empty circles for HI-deficient (HI - def > 0.4) cluster objects. The large filled blue and empty red circles give the mean values and the standard deviations in different bins of stellar mass determined in this work. The large green filled dots indicate the mean values of Gavazzi et al. (2015a,b). The bisector fit for HI-normal and HI-deficient galaxies are given by the solid black and red lines, and the linear direct fits by the dotted lines. The linear best fit of Ciesla et al. (2014) is indicated by a yellow dashed line, and the best fit of Peng et al. (2010) by the green dotted-dashed line. The error bar shows the typical uncertainty on the data.