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Cortical Control over the Direction of Macronuclear Elongation in the Heterotrich Ciliate Stentor coeruleus 1
Author(s) -
TERRA NOËL DE
Publication year - 1983
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.1550-7408.1983.tb02906.x
Subject(s) - macronucleus , ciliate , cortex (anatomy) , biology , elongation , cytoplasm , interphase , neuroscience , anatomy , microbiology and biotechnology , genetics , materials science , ultimate tensile strength , metallurgy
Earlier experimental work involving macronuclear implants in Stentor coeruleus has shown that the cytoplasmic cortex of the nuclear site 1) attracts the macronucleus and 2) holds it in place during interphase. Now experiments indicate macronuclei transferred with overlying cortex elongate in the direction of the transferred cortical pigment stripes, whether or not the transferred stripes realign in the direction of the host stentor's stripes. Therefore the third function of the cortex is to determine the direction of elongation and thus assure that both daughter cells at division receive part of the macronucleus.