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Studies on Specific Chemicals as Excysting Agents for Pleurotricha lanceolata *
Author(s) -
JEFFRIES WILLIAM B.
Publication year - 1962
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.1550-7408.1962.tb02638.x
Subject(s) - ethylenediaminetetraacetic acid , amino acid , nucleic acid , chemistry , chelation , aqueous solution , biochemistry , food science , organic chemistry
SYNOPSIS. Cysts of the hypotrichous ciliate Pleurotricha lanceolata were placed in dilute aqueous solutions of specific chemicals (carbohydrates, vitamins, L‐amino acids, nucleic acids and derivatives, other organic acids and tweens) to assay the effectiveness of these chemicals as excysting agents. It was found that some of the amino acids, deoxyribonucleic acid, ribonucleic acid, and some other organic acids induce excystment at rates equal to or better than the control medium, 0.05% (w/v) aqueous lettuce extract. Preliminary experiments with chelating agents, tri‐ and tetra‐sodium salts of ethylenediaminetetraacetic acid (Versenol 120 and Versene 100), indicate that they successfully initiate excystment, but support it inadequately thereafter so that most of the organisms die within the endocyst.