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The Division Index and Multiplication in a Mass Culture of Tetrahymena Following Inoculation *
Author(s) -
Scherbaum Otto
Publication year - 1957
Publication title -
the journal of protozoology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.067
H-Index - 77
eISSN - 1550-7408
pISSN - 0022-3921
DOI - 10.1111/j.1550-7408.1957.tb02517.x
Subject(s) - tetrahymena pyriformis , exponential growth , tetrahymena , division (mathematics) , multiplication (music) , biology , cell division , logarithm , stationary phase , population , fission , mitotic index , microbiology and biotechnology , chemistry , mathematics , mitosis , physics , cell , genetics , arithmetic , chromatography , combinatorics , medicine , mathematical analysis , environmental health , quantum mechanics , neutron
SUMMARY. Test tube cultures of Tetrahymena pyriformis GL in the early maximum stationary phase of growth were used as inocula. After the elapse of a short lag phase a rapid transition to the logarithmic phase of growth was observed in cultures grown on peptone media(4,6). During the early phase of exponential multiplication more cells (as expressed on a percentual basis of the population number) were in the visible stage of cytoplasmic fission than after the elapse of 5 to 6 generations. Analysis of comprehensive data suggests that the higher division index in the early logarithmic phase of growth is not the expression of a synchronization of cells in metabolic respects but rather indicates a prolongation of the stage of cell fission during this phase.