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The Influence of pH on the Cadmium‐Repressed Growth of the Alga Coelastrum proboscideum
Author(s) -
MüLLER KLAUS W.,
PAYER HANSD.
Publication year - 1979
Publication title -
physiologia plantarum
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.351
H-Index - 146
eISSN - 1399-3054
pISSN - 0031-9317
DOI - 10.1111/j.1399-3054.1979.tb02605.x
Subject(s) - cadmium , chemistry , growth inhibition , factorial experiment , algae , nuclear chemistry , environmental chemistry , biochemistry , botany , biology , in vitro , organic chemistry , statistics , mathematics
The inhibition of growth by different concentrations of CdCl 2 in the range 4,5 × 10 −7 to 5.6 × 10 −7 M was studied in the green alga Coelastrum proboscideum Bohlin in inorganic media at pH 4.3, 5.3 and 6.2. The factorial destgn of the experiments was evaluated as an analysis of 2 2 factors. Below pH 4.0 and above pH 6.5 growth was depressed without adding Cd. Cd concentrations exceeding 5.6 × 10 −8 M reduced algal growth significantly with a 50% inhibition at 5.6 × 10 −7 M Cd. The Cd concentration of 5.6 × 10 −7 M was less toxic at pH 6.2 than at pH 5.3 and 4.3, thus revealing a negative interaction between protons and Cd.