what is in allium root tip
4. Minimal mitotic activity in the root tip cells of Allium ceja is reached between three and four hours subsequent to treatment with 128 r of x-rays, and between two and one-half and three hours following treatment with 512 r of x-rays. Between treatment and fixation all root tips were maintained at 32 C. 5.icia root tip after irradiation. As is shown in Table 11, Allium root tip cells, treated with 128 r of x-rays, ex-hibit no significant decrease in late prophase frequency until two and one-half hours after treatment.