Table 3.

Effect of dietary pterostilbene supplementation on relative liver weight and plasma transaminase activities of 21-day-old broilers challenged with diquat.

Items1	SS		DQ		SEM	Stress effect		Diet effect		P-value
	CON	PT	CON	PT		SS	DQ	CON	PT	Stress	Diet	S × D
Relative liver weight2 (g/100 g BW)	2.53	2.55	2.89	2.69	0.04	2.54	2.79	2.71	2.62	0.001	0.218	0.117
ALT (U/L)	8.33	9.48	12.98	10.12	0.57	8.90	11.55	10.65	9.80	0.012	0.386	0.050
AST (U/L)	32.15b	33.97b	48.48a	30.84b	1.91	33.06	39.66	40.32	32.40	0.019	0.006	0.001

^a,bMeans within a row with different superscripts are different at P < 0.05.

Abbreviations: ALT, alanine aminotransferase; AST, aspartate aminotransferase; CON, birds received a basal diet from 1 to 21 D of age; DQ, birds were injected with diquat solution at 20 D of age; PT, birds received a pterostilbene-supplemented diet from 1 to 21 D of age; SS, birds were injected with sterile saline at 20 D of age; S × D, the interaction of stress and diet effects.

¹Mean values with pooled SEMs, n = 6.

²Relative liver weight was calculated as follows: (liver weight/final BW) × 100.