scholarly journals SPECIFIC INHIBITION OF CHLOROPLAST REPLICATION IN EUGLENA GRACILIS BY NALIDIXIC ACID

1967 ◽  
Vol 35 (3) ◽  
pp. 726-730 ◽  
Author(s):  
Harvard Lyman
Keyword(s):  
Nalidixic Acid ◽  
Euglena Gracilis ◽  
Specific Inhibition ◽  
Chloroplast Replication

scholarly journals Action of Nalidixic Acid on Chloroplast Replication in Euglena gracilis

1975 ◽  
Vol 55 (2) ◽  
pp. 390-392 ◽  
Author(s):  
Harvard Lyman ◽  
Ann S. Jupp ◽  
Ignacio Larrinua
Keyword(s):  
Nalidixic Acid ◽  
Euglena Gracilis ◽  
Chloroplast Replication

Chloroplast replication in synchronously dividing Euglena gracilis

Planta ◽  
1973 ◽  
Vol 115 (2) ◽  
pp. 125-134 ◽  
Author(s):  
Rosalinda Boasson ◽  
Sarah P. Gibbs
Keyword(s):  
Euglena Gracilis ◽  
Chloroplast Replication

scholarly journals STUDIES ON CHLOROPLAST DEVELOPMENT AND REPLICATION IN EUGLENA

1969 ◽  
Vol 41 (2) ◽  
pp. 431-440 ◽  
Author(s):  
Edgar F. Carell
Keyword(s):  
Cell Division ◽  
Vitamin B12 ◽  
Euglena Gracilis ◽  
Chloroplast Development ◽  
Vitamin B12 Deficiency ◽  
Normal Growth ◽  
Cell Protein ◽  
Chloroplast Replication ◽  
B12 Deficiency ◽  
Cellular Replication

When Euglena gracilis is grown under vitamin B12 deficiency conditions, the amount of protein and of chlorophyll per cell increase with decrease of B12 in the medium and consequently in the cell. The increase in cell protein is proportional to and precedes an increase in the number of chloroplasts per cell. This replication of the chloroplasts under deficiency conditions is not accompanied by nuclear or cell division. It is concluded that chloroplast replication in Euglena gracilis is independent of nuclear and cellular replication, at least under B12 deficiency conditions. We established a graph of the growth of Euglena under different concentrations of vitamin B12 added to the growth medium, which permitted us to calculate that at least 22,000 molecules of vitamin B12 per cell are required to give normal growth.

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