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Abnormalities in Nuclear Behavior and Mating Type Determination in Cytoplasmically Bridged Exconjugants of Doublet Paramecium aurelia *
Author(s) -
BUTZEL HENRY M.
Publication year - 1973
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.1550-7408.1973.tb06019.x
Subject(s) - paramecium aurelia , mating type , biology , macronucleus , paramecium , mating , fission , genetics , ciliata , cytoplasm , microbiology and biotechnology , physics , ciliate , protozoa , gene , nuclear physics , neutron
SYNOPSIS Exconjugant clones of Paramecium aurelia stock 51S, syngen 4, which fail to separate prior to the 1st fission have numerous cytologic and mating type determination anomalies. The doublets have abnormal distribution of macronuclear anlagen, fewer macronuclear fragments per cell, and abnormalities in numbers of micronuclei. Despite apparent cell fusion and mixture of cytoplasm, the singlets arising from each side of the doublet may be of opposite mating types, and mating type determination may remain unstable for 1 or more fissions in contrast to the usual pattern of mating type determination before the 1st postconjugation fission.