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Electron Microscopy of the Hypotrich Ciliate Oxytricha platystoma, with Consideration of its Macronuclear Organization
Author(s) -
CHAKRABORTY J.
Publication year - 1967
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.1550-7408.1967.tb01447.x
Subject(s) - macronucleus , nucleoplasm , micronucleus , nucleus , ciliate , feulgen stain , cytoplasm , paramecium , biology , micronucleus test , membrane , nucleolus , biophysics , microbiology and biotechnology , anatomy , chemistry , genetics , dna , organic chemistry , toxicity
SYNOPSIS. The body of Oxytricha platystoma is covered with 2 membranes, the outer or pellicular membrane and the inner or cytoplasmic membrane. Each cirrus consists of a bundle of 25‐50 cilia. There are 2 macronuclei and 2 micronuclei. The micronucleus is a very small body containing dense Feulgen‐positive material. The macronucleus is an elongated body surrounded by a double membrane. The dense Feulgen‐positive material is embedded in a less dense nucleoplasm. Some larger bodies found inside the nucleus may be nucleoli. There is a single reorganization band in each macronucleus. It consists of a solution plane and a reconstruction plane, and has a total thickness of 1.5 μ. The macronucleus divides amitotically, whereas the micronucleus divides mitotically.