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Influence of Vitamin B 12 on the Size and Growth of Euglena gracilis * †
Author(s) -
EPSTEIN SAMUEL S.,
WEISS JACQUELINE B.,
CAUSELEY D.,
BUSH P.
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.tb02630.x
Subject(s) - euglena gracilis , euglena , vitamin b , cell size , vitamin , particle size , biology , growth rate , botany , chemistry , biochemistry , microbiology and biotechnology , chloroplast , mathematics , paleontology , geometry , gene
SYNOPSIS. By an automatic electronic technique—the Flying Spot Particle Resolver—the effect of a wide range of concentrations of vitamin B 12 on the size and growth of the B 12 ‐dependent Euglena gracilis was studied. Rate of cell growth was directly proportional, and cell size inversely proportional, to B 12 concentration. Gross B 12 depletion resulted in gigantism and prolongation of generation times.