Table 1.

Effect of propolis treatment in reducing the levels of intracellular oxidation (ROS production) after menadione stress.

	Relative fluorescence
Strains	Not treated	Treated
Wild type	1.3a ± 0.1	0.8b ± 0.1
sod1Δ	2.2c ± 0.3	1.0b ± 0.2

The Wild type and sod1Δ strains were directly stressed with menadione (15 mM) or previously propolis treated (25 μg/mL) during 60 min before being stressed with menadione. The results expressing relative fluorescence were obtained from the average ± standard deviation of three independent experiments. Different letters mean statistically different results.