Genotoxicity of Polycyclic Aromatic Hydrocarbons and Nitro-Derived in Respirable Airborne Particulate Matter Collected from Urban Areas of Rio de Janeiro (Brazil)
Table 5
Mitotic index and percentage of mitosis stages and mitotic aberrations in the root tip cells of A. cepa treated with organic extract derived at site 3.
Month
µg/mL
Mitotic index
% P.
% M.
% A.
% T.
% T. A.
% MCN
% Bridge
% Break
% Lagging
NC
0.04 ± 0.02
2.60
0.70
0.40
1.00
0.12
0.07
0.00
0.00
0.05
5
0.03 ± 0.02
0.70
0.40
0.90
0.30
0.30
0.04
0.02
0.00
0.14
August
10
0.07 ± 0.03
2.70
2.20
0.90
2.10
0.50*
0.30
0.10
0.00
0.10
15
0.06 ± 0.04
1.70
2.20
1.10*
1.00
0.26
0.10
0.13
0.00
0.03
20
0.04 ± 0.02
1.60
1.40
0.70
1.00
0.16
0.10
0.03
0.00
0.03
25
0.03 ± 0.01
1.30
0.90
0.60
0.60
0.15
0.00
0.00
0.00
0.15
NC
0.08 ± 0.06
6.00
1.60
0.90
1.40
0.67
0.10
0.08
0.20
0.42
5
0.04 ± 0.03
3.10
1.00
0.40
2.10
2.05*
1.63*
0.12
0.22
0.05
September
10
0.03 ± 0.03
1.00*
0.80
0.40
0.60
0.78
0.25
0.03
0.20
0.30
15
0.10 ± 0.10
3.30
3.20
1.20
2.00
1.80
0.00
1.00*
0.60
0.20
20
0.00 ± 0.00*
0.00*
0.00*
0.00
0.00
0.00
0.00
0.00
0.00
0.00
25
0.02 ± 0.01*
1.00*
0.10*
0.00
0.70
0.12
0.00
0.00
0.10
0.02
NC
0.08 ± 0.01
5.70
0.70
0.60
1.20
0.30
0.00
0.05
0.05
0.20
5
0.09 ± 0.01
3.80
1.60
0.80
2.90
0.60
0.00
0.00
0.50*
0.10
October
10
0.06 ± 0.05
1.90*
0.70
0.40
2.70
0.28
0.10
0.03
0.05
0.10
15
0.03 ± 0.01*
0.90*
0.70
0.50
0.80
0.40
0.20
0.10
0.00
0.10
20
0.00 ± 0.00*
0.00*
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
25
0.01 ± 0.02*
0.80*
0.00
0.03
0.03
0.33
0.00
0.03
0.00
0.00
P.: prophase; M.: metaphase; A.: anaphase; T.: telophase; T.A.: total abnormalities; MCN.: micronucleus; NC.: negative control—DMSO; positive control = benzo(a)pyrene 10 µg/mL (mitotic index = 0.00*; % T.A. = 0.00; %) * ≤ 0.05.
