Protection of Negative Gravitaxis in Euglena gracilis Z against Gamma-ray Irradiation by Trolox C

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Protection of negative gravitaxis in Euglena gracilis Z against gamma-ray irradiation by Trolox C.

The protective effects of Trolox on the inhibition of negative gravitaxis in Euglena gracilis exposed to 200 Gy 60Co gamma-rays were examined using different concentrations (1, 10 and 100 microM). The orientation precision of the negative gravitaxis was quantified using the r-value. A significant decrease in the r-value was observed in gamma-irradiated samples (0.18+/-0.03) compared to those of...

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High Light-induced Sign Change of Gravitaxis in the Flagellate Euglena gracilis is Mediated by Reactive Oxygen Species

Euglena gracilis responds to abiotic stress factors (high light, salinity, heavy metals) with a sign change of its gravitactic behavior. This phenomenon is oxygen dependent and can be suppressed by the application of the reductant dithionite. It is not mediated by the photoreceptor since also blind mutants change their movement behavior upon high light exposure. It is also not mediated by the c...

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Synthesis of oleic acid by Euglena gracilis.

1. CHA, S., MOURAD, N., CHA, C.-J. M., AND PARKE, R. E., JR., Fedemtion Proc., 24, 362 (1965). 2. MITCHELL, R. A., BUTLER, L. G., AND BOYER, P. D., B&hem. and Biophys. Research Communs., 16, 545, (1964). 3. KREIL, G., AND BOYER, P. D., Biochem. and Biophys. Research Commune., 16, 551 (1964). 4. CHA, S., AND PARKS, R. E., JR., Federation Proc., 22, 361 (1963); J. Btil. Chem., 239, 1961 (1964). 5...

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The Mitochondrion of Euglena gracilis.

In the presence of oxygen, Euglena gracilis mitochondria function much like mammalian mitochondria. Under anaerobiosis, E. gracilis mitochondria perform a malonyl-CoA independent synthesis of fatty acids leading to accumulation of wax esters, which serve as the sink for electrons stemming from glycolytic ATP synthesis and pyruvate oxidation. Some components (enzymes and cofactors) of Euglena's ...

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ژورنال

عنوان ژورنال: Journal of Radiation Research

سال: 2002

ISSN: 0449-3060

DOI: 10.1269/jrr.43.s257