Guttes S, Guttes E. Regulation of DNA replication in the nuclei of the slime mold Physarum polycephalum. Transplantation of nuclei by plasmodial coalescence.
J Cell Biol 1968;
37:761-72. [PMID:
11905206 PMCID:
PMC2107444 DOI:
10.1083/jcb.37.3.761]
[Citation(s) in RCA: 34] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
Nuclei in G2 phase of the slime mold Physarum polycephalum, when transplanted, by plasmodial coalescence, into an S-phase plasmodium, failed to start another round of DNA synthesis. In the reciprocal combination, S-phase nuclei in a G2-phase host continued DNA synthesis for several hours without appreciable decrease in rate. It is suggested that the beginning of DNA replication is determined by an event, either during or shortly after mitosis, which renders the chromosomes structurally competent for DNA replication.
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