Star formation rate logSFR (left) and D_n(4000) index for galaxies in clusters, in the regions of influence (i) of clusters, in the high-density regions (D85, excluding clusters; global luminosity-density D8 ≥ 5), and in the low-density regions (D805, D8 < 5 in the units of mean luminosity-density) of our sample and filament members (with distance from the nearest filament axis D_fil <  = 0.5 h⁻¹ Mpc) and non-member galaxies (D_fil > 0.5 h⁻¹ Mpc). Different samples are marked in the figure. We only considered filaments with length L_fil ≥ 3 h⁻¹ Mpc as more reliable. The horizontal line in the left panel corresponds to logSFR = −0.5, and lines in the right panel correspond to D_n(4000) = 1.55, 1.75, and 2.0.