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Volume, Nucleic Acid and Nitrogen Contents of Strains of Green and i Colorless Englena gracilis and of Astasia longa *
Author(s) -
NEFF RUTH H.
Publication year - 1960
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.1550-7408.1960.tb00711.x
Subject(s) - euglena gracilis , euglena , nucleic acid , strain (injury) , feulgen stain , staining , dna , biology , chemistry , biochemistry , chloroplast , genetics , gene , anatomy
SYNOPSIS. Nucleic acid, the nitrogen content per cell, and cell and nuclear volume were determined in 4 green and 2 heat‐induced colorless strains of Euglena gracilis and one strain of Astasia longa. All strains of Euglena were identical in cell and nuclear volume. The deoxyribonucleic acid content per cell of the apoplastidic strains was higher than that of the corresponding green strains by I 1 / , times. Although their nuclei were not enlarged, Feulgen staining of the colorless strains was also more intense. The significance of the increase in DNA in experimentally induced apoplastidy is discussed. As for N total nucleic acid P, and pentosenucleic acid—the dir between the strains reflected previously established morphological and physiological relationships between them. The single strain of Astasia studied was identical in stru: and size with the apoplastidic Euglena stnMH Hownner. it was quite unlike them in all the biochemical characteristic; examined.