THE INFLUENCE OF OXYGEN ON THE X-RAY INDUCTION OF STRUCTURAL CHANGES IN DROSOPHILA OOCYTES

Journal Article · Sun Mar 01 04:00:00 EST 1959 · Genetics (U.S.)

OSTI ID:4269806

Abrahamson, S

Through the use of x-ray dosage fractionation methods, it became possible for the first time to demonstrate in Drosophila oocytes effects of oxygen concentration on induced gross chromosomal rearrangements and to test separately the effect of different oxygen concentrations applied before, during, or after irradiation. Oxygen present at the time of irradiation results in a significantly greater frequency of half-translocations than produced in air, Anoxia (nitrogen) at the time of irradiation results in a drastic reduction in the frequency of half-translocations as compared with air. Oxygen between irradiations is not as effective as air in reducing the half-translocation frequency. Anoxia between the two x-ray fractions increases half-translocation frequency. Although a part of this effect may be by the prohibition of joining of broken ends it seems to be greater than can be expected simply on the basis of this passive role. Postoxygen treatment had no detected effect but postnitrogen exposure significantly increased the rearrangement frequency (auth)

• Research Organization: Indiana Univ., Bloomington
• NSA Number: NSA-13-016690
• OSTI ID: 4269806
• Journal Information: Genetics (U.S.), Journal Name: Genetics (U.S.) Vol. Vol: 44; ISSN GENTA
• Country of Publication: Country unknown/Code not available
• Language: English

Related Subjects

AIR
ANIMAL CELLS
BIOLOGY AND MEDICINE
CHROMOSOMES
DOSE FRACTIONATION
DROSOPHILA
GONADS
INSECTS
MUTATIONS
NITROGEN
OOCYTES
OXYGEN
QUANTITY RATIO
RADIATION DOSES
RADIATION EFFECTS
RADIATION INJURIES
SEX
VARIATIONS
X RADIATION