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Nuclear Activity During Regeneration in Blepharisma intermedium Bhandary *
Author(s) -
PARKER JOHN W.,
GIESE ARTHUR C.
Publication year - 1966
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.1550-7408.1966.tb01972.x
Subject(s) - macronucleus , regeneration (biology) , biology , microbiology and biotechnology , contraction (grammar) , elongation , genetics , gene , materials science , endocrinology , ultimate tensile strength , metallurgy
SYNOPSIS. Transection and regeneration of Blepharisma intermedium initiate complex macronuclear activity and micronuclear division. Reversible condensation of the macronucleus is achieved by contraction which involves primary and secondary coiling. Primary coiling, evident in vegetative cells, is enhanced by pronounced constriction of the macronuclear extremities during regeneration. Secondary coiling is restricted to the period of contraction and is initiated at the ends of the mauonucleus. Condensation terminates the coiling processes and gives rise to an amorphous structure. Re‐elongation of the macronucleus is not followed immediately by coiling. Micronuclear division begins early in regeneration, but the peak of visible activity is not reached until the 3rd through 5th hours.