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Plant growth and development is an open system,and root building is one of the important stages in the process of seed germinating to seedling formation[1].And a bad or good root growth directly affects subsequent plant growth.Root growth arises from the proliferation of root apical meristematic cells followed by cell expansion that results in root elongation.Plant root apical meristems which are actively proliferating tissues and present high sensitivity to the genotoxic effects of ionization irradiation,are particularly good materials for cytological studies[2].
Plant growth and development is an open system, and root building is one of the important stages in the process of seed germinating to seedling formation [1]. And a bad or good root growth directly affects subsequent plant growth. Root growth arises from the proliferation of root apical meristematic cells followed by cell expansion that results in root elongation. Plant root apical meristems which are actively proliferating tissues and present high sensitivity to the genotoxic effects of ionization irradiation, are particularly good materials for cytological studies [2].