Table 2.

Effects of 2,4-D on type and percentage of mitotic abnormalities in the root tips of A. cepa

Concentrations (mg/L)	No. of dividing cells	Abnormalities %						Total abnormalities %
		C-mitosis	Lagging chrom.	Stickiness	Bridges	Fragment	Multipolar
24 h
Control	801	–	–	–	0.37	–	–	0.37
0.67	911	0.44	–	0.14	0.76	0.10	0.54	1.98
1.34	1076	0.09	–	–	0.74	–	–	0.83
2.01	984	0.10	–	0.10	0.42	–	–	0.62
2.68	757	0.13	0.39	0.92	1.05	0.13	0.26	2.88
3.35	462	0.21	0.43	–	1.08	–	0.64	2.36
4.02	393	–	–	–	1.01	–	0.25	1.26
48 h
Control	481	–	–	–	0.19	–	–	0.19
0.67	528	0.76	0.37	0.57	1.35	–	0.19	3.24
1.34	806	–	–	0.12	0.74	–	0.24	1.11
2.01	907	0.11	–	0.22	0.77	0.11	–	1.21
2.68	665	0.30	0.15	–	0.60	–	0.30	1.35
3.35	711	0.14	–	–	0.84	–	–	0.98
4.02	310	0.96	–	0.32	0.32	–	0.32	1.92