Figure 5

Images of chromosomal and nuclear alterations: (a) metaphase micronucleus, (b) delay in anaphase, (c) anaphase bridge, (d) micronucleus in interphase, (e) lost chromosome, and (f) c-metaphase, observed in meristematic lettuce cells treated with the essential oils of S. botocudorum and S. tupiniquinorum at 3,000, 1,500, 750, 375 and 187.5 ppm. Bar: 10 μm.