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Mating‐Type Dependent Cell Pairing in Oxytricha hymenostoma. III. Chromatin Mixing After Macronuclear Fusion *
Author(s) -
BANCHETTI ROSALBA,
NOBILI RENZO,
RICCI NICOLA,
ESPOSITO FULVIO
Publication year - 1980
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.1550-7408.1980.tb05398.x
Subject(s) - pairing , chromatin , fusion , microbiology and biotechnology , biology , mating type , cell fusion , mating , dna , biophysics , genetics , cell , physics , gene , linguistics , philosophy , superconductivity , quantum mechanics
SYNOPSIS. Mating‐type dependent cell pairing in Oxytricha hymenostoma was studied by both light autoradiography and transmission electron microscopy. The process results in the macronuclear bodies of the 2 partners fusing completely with each other 2 by 2. In each fusion the 2 chromatin masses, easily distinguishable from each other for the first 6 h of the pairing, progressively intermingled and underwent a sort of rearrangement so that they eventually acquired a uniform pattern. The possible mechanisms regulating macronuclear fusion and DNA amount in the daughter cells are discussed.