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EFFECT OF COPPER ON GROWTH, SILICIC ACID UPTAKE AND SOLUBLE POOLS OF SILICIC ACID IN THE MARINE DIATOM, THALASSIOSIRA WEISFLOGII (BACILLARIOPHYCEAE) 1
Author(s) -
Rueter John G.
Publication year - 1983
Publication title -
journal of phycology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.85
H-Index - 127
eISSN - 1529-8817
pISSN - 0022-3646
DOI - 10.1111/j.0022-3646.1983.00101.x
Subject(s) - silicic acid , diatom , biology , thalassiosira weissflogii , silicic , copper , cell division , intracellular , growth rate , thalassiosira pseudonana , biochemistry , botany , cell , phytoplankton , ecology , chemistry , oceanography , paleontology , geology , geometry , mathematics , organic chemistry , volcano , nutrient
The toxicity of Cu to Thalassiosira weissflogii (Grunow) was investigated, focusing on the internal soluble pool of silicic acid. Silicic acid uptake and growth rates were found to be functions of both the cupric ion activity and the concentration of silicic acid in the growth medium. The soluble pool of Si per cell depended on the balance between the uptake rate and the division rate. The soluble pool in non‐dividing cultures reflected simply the uptake rate (and inhibition by copper of the uptake rate), but in dividing cultures the soluble pools had complex patterns with time depending on uptake rates and timing of division. Intracellular soluble pools of silicic acid are a good indicator for the relative inhibition of uptake and growth processes.