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The relationship of the dispersion phase of chromocentric nuclei in the mitotic cycle to DNA synthesis

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Summary

A small proportion of nuclei in root meristems ofAllium flavum, Bryonia dioica andLupinus angustifolius exhibit a dispersion of their chromocentres; the structure of such nuclei corresponds to the “Zerstäubungsstadium” (Z-phase) described byHeitz.

Microdensitometry and autoradiography were employed to determine the location of the Z-phase in the mitotic cycle. In bothAllium andBryonia Z-phase is located at the end of the DNA-synthetic (S) phase and not at early prophase as has been assumed hitherto; inLupinus Z-phase is also associated with the S-phase.

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Barlow, P.W. The relationship of the dispersion phase of chromocentric nuclei in the mitotic cycle to DNA synthesis. Protoplasma 90, 381–392 (1976). https://doi.org/10.1007/BF01275688

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  • DOI: https://doi.org/10.1007/BF01275688

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