Figure 4: Comparison of mitotic index (MI) of roots of Allium cepa L. bulbs treated with hot aqueous extract of Achyrocline satureioides (As-HAE). MI 1: mitotic index 1 (treatment with As-HAE for 2 days), MI 2: mitotic index 2 (treatment with As-HAE for 5 days), MI 3: mitotic index 3 (treatment) with As-HAE for 2 days followed by 3 days with water (reversion), C(+): positive control (paracetamol 0.3 mg/mL), and C(−): negative control (mineral water). Each value represents the mean ± SD obtained from four different bulbs ().