Abstract
The durations of a mitotic cell cycle and its component phases were investigated in the root meristematic cells of male Rumex acetosa by means of pulse labelling with 3H-thymidine autoradiography. The average duration of the mitotic cell cycle was determined to be 15.5 hours, and that of its component phases to be 2.4 hours for G1, 7.8 hours for S, 3.5 hours for G2, 0.9 hours for prophase, 0.5 hours for metaphase and 0.4 hours for ana- and telophase, respectively.
