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Volume Expansion of Euglena gracilis in Fresh Culture Media *
Author(s) -
Corbett John J.
Publication year - 1957
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.1550-7408.1957.tb02489.x
Subject(s) - euglena gracilis , volume (thermodynamics) , osmotic pressure , population , competition (biology) , euglena , chemistry , botany , biophysics , biology , biochemistry , ecology , thermodynamics , physics , chloroplast , demography , gene , sociology
SUMMARY. Transfers of Euglena gracilis to fresh media gave rise to increased volumes of the flagellates, the magnitude of expansion varying with temperature, pH, osmotic pressure, and number of nutritional particles in the medium. Expansion was accompanied by decreased protoplasmic density and increased intracellular solids and water. When the population density of the flagellates was more than optimal, competition for substrates was reflected in reduced maximum volume. Below the optimal range, a similar decrease in maximum volume was observed.