Fig. 1

Effects of Enteromorpha prolifera polysaccharides on the apoptosis rate of jejunal (A, B) and ileal (C, D) epithelial cells in yellow-feathered broilers under heat stress. TN Thermal neutral zone, HS Heat stress, HSE Heat stress group supplemented 0.1% Enteromorpha prolifera polysaccharides. A and C, 200× magnification, the scale bars are 100 μm. ^a−cDifferent superscripts indicate a significant difference between groups (P < 0.05)