Effects of tritiated water on germ cells in medaka embryos

Journal Article · Tue Feb 01 04:00:00 EST 1983 · Radiat. Res.; (United States)

DOI:https://doi.org/10.2307/3575989· OSTI ID:5895377

Etoh, H; Hyodo-Taguchi, Y

Embryos of medaka, Oryzias latipes, were exposed to tritiated water and /sup 137/Cs ..gamma.. rays continuously from the one-cell stage until hatching (10 days at 26omicronC). Germ cells in the gonads of newly hatched fry were counted in histological sections and compared with controls. The accumulated dose for 50% survival of germ cells was 195 rad for tritium ..beta.. rays and 350 rad for /sup 137/Cs ..gamma.. rays. Female progeny were produced using Yamamoto's method. The 50% survival doses for female germ cells treated in a manner similar to that described above were 140 rad for ..beta.. rays and 305 rad for ..gamma.. rays. When embryos of medaka were irradiated with ..gamma.. rays below an accumulated dose of 475 rad or treated with tritiated water at a concentration of 0.2 mCi/ml or lower, the dose response of the germ cells showed an exponential relationship. It appeared that there was no threshold or significant dose-rate effect for either ..beta.. or ..gamma.. rays on germ cell survival, and that tritium ..beta.. rays were more effective than /sup 137/Cs ..gamma.. rays in germ cell killing.

• Research Organization: National Inst. of Radiological Sciences, Chiba, Japan
• OSTI ID: 5895377
• Journal Information: Radiat. Res.; (United States), Journal Name: Radiat. Res.; (United States) Vol. 93:2; ISSN RAREA
• Country of Publication: United States
• Language: English

Related Subjects

560152* -- Radiation Effects on Animals-- Animals
560162 -- Radionuclide Effects
Kinetics
& Toxicology-- Animals
Plants
Microorganisms
& Cells
63 RADIATION, THERMAL, AND OTHER ENVIRON. POLLUTANT EFFECTS ON LIVING ORGS. AND BIOL. MAT.
ALKALI METAL ISOTOPES
ANIMALS
AQUATIC ORGANISMS
BETA DECAY RADIOISOTOPES
BETA-MINUS DECAY RADIOISOTOPES
BIOLOGICAL EFFECTS
BIOLOGICAL RADIATION EFFECTS
CELL KILLING
CESIUM 137
CESIUM ISOTOPES
DATA
DOSE-RESPONSE RELATIONSHIPS
DOSES
ELECTROMAGNETIC RADIATION
EXPERIMENTAL DATA
FISHES
GAMMA RADIATION
GERM CELLS
INFORMATION
IONIZING RADIATIONS
ISOTOPES
LABELLED COMPOUNDS
NUCLEI
NUMERICAL DATA
ODD-EVEN NUCLEI
RADIATION DOSES
RADIATION EFFECTS
RADIATIONS
RADIOINDUCTION
RADIOISOTOPES
TRITIUM COMPOUNDS
VERTEBRATES
YEARS LIVING RADIOISOTOPES