Bridging a Gap between Cr(VI)-Induced Oxidative Stress and Genotoxicity in Lettuce Organs after a Long-Term Exposure

Table 3

Micronuclei and mitotic index and abnormalities in roots of L. sativa L. exposed to Cr(VI). Values are presented as the mean ± standard deviation. Different letters indicate for the same parameter significantly different means (). Image: microphotograph of an abnormal metaphase in roots (bar = 20 μm).

Cr(VI) (mg/L)	Micronuclei (n/1000)	MI%	Mitotic abnorm. (n/1000)
0	Nd (0)	15 ± 5	Nd (0)
50	1 ± 1	19 ± 6	Nd (0)
150	5 ± 4	9 ± 5
200	9 ± 5	7 ± 3	8 ± 3