Table 5.

The effect of quercetin and naringenin on the reactive oxygen species (ROS) production (RLU/s/10⁶ sperm) by extended boar spermatozoa (n = 28).

	0 h	24 h	48 h	72 h
Ctrl	6.92 ± 0.93	15.00 ± 1.73	23.67 ± 2.98	33.53 ± 3.25
5 µM/L QUE	6.47 ± 0.91	10.33 ± 1.55	18.00 ± 1.75	25.64 ± 1.59 *
10 µM/L QUE	5.93 ± 0.70	9.36 ± 1.85 *	15.64 ± 2.03 **	21.38 ± 2.05 ***
25 µM/L QUE	6.73 ± 0.46	10.55 ± 1.47	22.64 ± 1.89	26.15 ± 1.15
50 µM/L QUE	7.32 ± 0.65	16.58 ± 2.05	29.58 ± 1.58	38.73 ± 2.08
5 µM/L NAR	6.41 ± 0.68	9.36 ± 1.74 *	16.54 ± 1.15 *	21.33 ± 3.05 ***
10 µM/L NAR	5.73 ± 0.82	8.35 ± 0.56 *	15.63 ± 0.59 **	19.25 ± 1.87 ****
25 µM/L NAR	6.03 ± 0.95	8.67 ± 0.89 *	12.85 ± 1.59 ***	18.33 ± 1.79 ****
50 µM/L NAR	6.76 ± 0.58	11.69 ± 1.76	20.00 ± 1.73	31.00 ± 3.61

Mean ± S.D. * p < 0.05; ** p < 0.01; *** p < 0.001; **** p < 0.0001 in comparison with the control. QUE—quercetin; NAR—naringenin.