Effects of chloramphenicol on growth, size distribution, chlorophyll synthesis and ultrastructure of Euglena gracilis.

Effects of ethidium bromide on growth, chlorophyll synthesis, ultrastructure and mitochondrial DNA in green and bleached mutant, Euglena gracilis.

Studies on Chloroplast Development and Replication in Euglena: III. A Study of the Site of Synthesis of Alkaline Deoxyribonuclease Induced during Chloroplast Development in Euglena gracilis.

During chloroplast development in Euglena, the activity of a specific DNase, Euglena alkaline DNase, increases in a manner similar to that of chlorophyll synthesis, but without the lag customarily associated with the early hours of chlorophyll synthesis. The increase in Euglena alkaline DNase activity is not inhibited by chloramphenicol or by streptomycin, but is inhibited by cycloheximide. Eug...

Relative Requirements for Magnesium of Protein and Chlorophyll Synthesis in Euglena gracilis.

The relationships among Mg, growth, chlorophyll synthesis, and cytoplasmic polysome content were studied in Euglena gracilis grown in different levels of the metal. At all levels of magnesium from 20 to 1,600 mumolar, both protein and chlorophyll are formed with exponential kinetics. The apparent rates of synthesis and final yields of both components are greater at higher levels of Mg, but the ...

Dna-dependent Rna Synthesis in Chloroplasts of Euglena Gracilis

Isolated chloroplasts of Euglena gracilis have been shown to be capable of incorporating amino acids into protein (2). This incorporation is inhibited by actinomycin D, a fact which suggests that the chloroplasts might be capable of DNAdependent RNA synthesis. Such RNA synthesis is also indicated in a recent report (6) showing inhibition of chlorophyll synthesis by actinomycin. In conjunction w...

The Relationship between Chlorophyll and the Carotenoids in the Algal Flagellate, Euglena

1. We have obtained an action spectrum for chlorophyll formation in Euglena gracilis. This action spectrum is similar to the absorption spectrum of protochlorophyll. However, efforts to isolate and identify this pigment have been unsuccessful. 2. Porphyrins have been extracted from both the normal and dark-adapted Euglena and a chlorophyll-free mutant. 3. The "action" spectra for chlorophyll an...