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The effects of the substratum, divalent and monovalent cations on locomotion in Amoeba proteus
Author(s) -
Hopkins Dwight L.
Publication year - 1929
Publication title -
journal of morphology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.652
H-Index - 74
eISSN - 1097-4687
pISSN - 0362-2525
DOI - 10.1002/jmor.1050480204
Subject(s) - divalent , strontium , amoeba proteus , potassium , calcium , magnesium , barium , potassium phosphate , inorganic chemistry , proteus , phosphate , biology , biophysics , biochemistry , chemistry , amoeba (genus) , microbiology and biotechnology , chromatography , organic chemistry , escherichia coli , gene
The rate of locomotion in Amoeba proteus is dependent upon the nature of the substratum, the nature of the different divalent and monovalent cations present, and the ratio of the amount of the monovalent cations to the amount of calcium or strontium. Calcium is more efficient than strontium in antagonizing potassium. Magnesium and barium do not antagonize potassium. The four monovalent cations studied in antagonizing calcium are efficient in the following order: Na>K>Li>Rb. Calcium and potassium are more effective against antagonistic cations when combined with chlorine than when combined with phosphate.