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Morphological Alterations in Euglena gracilis Induced by Treatment with CTAB (Cetyltrimethylammonium Bromide) and Triton X‐100: Correlations with Effects on Photophobic Behavioral Responses *
Author(s) -
MIKOLAJCZYK EWA,
DIEHN BODO
Publication year - 1978
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.1550-7408.1978.tb04169.x
Subject(s) - euglena gracilis , biophysics , bromide , euglena , flagellum , triton x 100 , electron microscope , chemistry , light intensity , biology , pulmonary surfactant , biochemistry , chloroplast , optics , organic chemistry , gene , physics
SYNOPSIS. Treatment of Euglena gracilis with the cationic detergent CTAB at concentrations of 0.05 mM or higher selectively inhibited the ability of the cells to respond with flagellar reorientation to a sudden decrease of light intensity (step‐down photophobic response). The ability to respond similarly to an increase in light intensity (step‐up photophobic response) was unaffected even at detergent concentrations at which the step‐down response was completely inhibited. Electron microscopy of cells treated with 1.0 mM CTAB revealed selective destruction of the membrane of the reservoir and flagellum. No selective effects upon the step‐down or step‐up photophobic responses were found upon treatment of the cells with Triton X‐100.