Dictyosome Structure in Euglena Gracilis

Distribution of microtubules in the golgi apparatus of Euglena gracilis.

A system of microtubules has been demonstrated as a consistent feature within the Golgi apparatus of Euglena gracilis. The microtubules are between 12 and 17 ran in diameter and are usually positioned in the intercisternal space between adjacent cisternae. There are seldom more than 2-5 microtubules per dictyosome section, and these may be distributed variously throughout the stack. At least so...

GROWTH RESPONSE OF Euglena gracilis & Selenastrum capricornutum IN RESPONSE TO pH

Ultraviolet Inactivation of Chloroplast Formation in Synchronously Dividing Euglena Gracilis.

Ultraviolet inactivation of chloroplast formation was studied in synchronously dividing cultures of Euglena gracilis. Sensitivity to sublethal doses given at intervals throughout the cell cycle was greater just before cell division than during division. There was approximately a twofold difference in the doseresponse relationships for the periods of high and low sensitivity.

Occurrence and operation of the glycollate--glyoxylate shuttle in mitochondria of Euglena gracilis Z.

Both glyoxylate reductase (NADP+) and glycollate dehydrogenase were located exclusively in mitochondria in Euglena gracilis and constitute the glycollate--glyoxylate shuttle, whose existence in higher plants was thought doubtful, owing to different subcellular locations of the two enzymes. Disrupted Euglena mitochondria showed a glycollate-dependent NADPH oxidation, indicating actual operation ...

The Carotenoid Hydrocarbons of Euglena gracilis and Derived Mutants.

An examination of the carotene fractions extracted from Euglena gracilis Z and pressure-bleached Euglena mutants PR-1, PR-2, PR-3, and PR-4 revealed phytoene in mutants PR-1, PR-2, and PR-3. Photosynthetic E. gracilis Z cultured at different light intensities showed no detectable phytoene, nor was phytoene found in mutant PR-4. However, dark-cultured E. gracilis Z yielded readily assayable amou...