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Hyperthermia induced ultrastructural changes inStylonychia mytiluscells

Authors
Journal
Journal of Thermal Biology
0306-4565
Publisher
Elsevier
Publication Date
Volume
16
Issue
5
Identifiers
DOI: 10.1016/0306-4565(91)90014-s
Keywords
  • Hyperthermia
  • Ultrastructure
  • Slylomychia Mytilusprotozoa

Abstract

Abstract 1. 1.|Ultrastructural organization of Stylonychia mytilus (a ciliated protozoan) cells is studied in response to hyperthermia treatment (30°C). 2. 2.|Cytoplasmic organization is altered as compared to the control cells grown at 23°C. The channel system expands and thereby restricts the membrane-bound cytoplasm. Tubular bodies of the channel system are scarce. Vesicles of the rough endoplasmic reticulum show dilation and there is persistent development of smooth endoplasmic reticulum. 3. 3.|Membrane-bound vesicles containing osmiophilic bodies appear in these cells. Macronuclear chromatin gets dispersed, shows a reticular pattern of dense chromatin an the appearance of microfilaments (4–5 nm). Nucleoli are hypertrophied and develop a fine fibrillar are in the centre with a fibrillar and granular zones at the rim. 4. 4.|The study reveals the subcellular adaptations of heat treated Stylonychia cells which otherwise exhibit normal external morphology and growth characteristics.

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