Fig. 4

TUNEL staining on immunofluorescence images in paraformaldehyde-fixed cross-sections from the jejunum of SR-CON (a), W-CON (b), W-RSV (c), and W-PT (d) groups (100 × and 400 × magnification). SR-CON piglets continued to be nursed by sows aged between 21 and 28 days, TUNEL terminal deoxynucleotidyl transferase dUTP nick end labeling, W-CON piglets were fed a basal diet aged between 21 and 28 days, W-RSV piglets were fed a diet supplemented with 300 mg/kg of resveratrol aged between 21 and 28 days, W-PT piglets were fed a diet supplemented with 300 mg/kg of pterostilbene aged between 21 and 28 days