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

Tetsuya Sakashita | Zendy; Masahiro Doi | Zendy; Hiroshi Yasuda | Zendy; Shoichi Fuma | Zendy; DonatP. Häder | Zendy

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

Author(s) -

Tetsuya Sakashita,

Masahiro Doi,

Hiroshi Yasuda,

Shoichi Fuma,

DonatP. Häder

Publication year - 2002

Publication title -

journal of radiation research

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.643

H-Index - 60

eISSN - 1349-9157

pISSN - 0449-3060

DOI - 10.1269/jrr.43.s257

Subject(s) - trolox , euglena gracilis , irradiation , euglena , biophysics , chemistry , radiochemistry , biology , biochemistry , antioxidant , physics , chloroplast , dpph , nuclear physics , gene

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 non-irradiated samples (0.47+/-0.03). There were no significant changes in the r-value of cells exposed to 200 Gy gamma-rays by the addition of 1 or 10 microM of Trolox. A significant increase (0.19) in the r-value of cells exposed to 200 Gy with 100 microM Trolox was observed. The results indicates that Trolox at a concentration of 100 microM protects negative gravitaxis against 60Co gamma-ray irradiation at a dose of 200 Gy. It also suggests that the negative gravitaxis of Euglena gracilis is affected by free radicals.

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