Some Problems of Chromosomal Aberration Studies in Meristems
Both dormant and active root meristems are frequently used in the study of radiation cytology as if they were homogeneous cell systems. This assumption is very far from the truth, for heterogeneity is present with regard to cell type, cell stage, cycle and phase times, and the metabolic status of the cells. Moreover, the dormant root is “dormant” when irradiated but “active” when fixed for observation, and the mobilization process introduces additional complications not normally present in roots that have been growing for some time.
KeywordsFixation Time Mitotic Index Root Meristem Sensitive Region Tritiated Thymidine
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