THE VARYING INFLUENCES ON THE MUTABILITY OF MATURE AND IMMATURE GERM CELLS BY IRRADIATION IN N$sub 2$, O$sub 2$, AND CO ATMOSPHERES

Journal Article · Mon Jun 01 04:00:00 EDT 1959 · Strahlentherapie (West Germany)

OSTI ID:4263778

Fritz-Niggli, H

The rate of mutations of dominant and recessive lethal factors and translocations in Drosophila depends on the stage of development of the germ cells irradiated in air. The scale of sensibility is the same for all types of mutations, beginning at the most sensitive stage: spermatocytes, spermatides, mature sperms, spermatogonia. Irradiation in pure N/sub 2/ and CO atmosphere decreases the rate of mutations. The protection effect of CO is less than the effect of N/sub 2/. The protection effect depends on the stage of development of the irradiated germ cell. Mature sperms respond little to protection factors. Their rate of mutations is increased by irradiation in pure O/sub 2/ atmosphere. The rate of mutations of irradiated spermatides and spermatocytes can be decreased considerably by irradiation in pure N/sub 2/. Spermatogonia are indifferent to irradiation in N/sub 2/ atmosphere. The possibility exists that an increased proportion of O/sub 2/ of spermatides and spermatocytes, as compared to mature sperrms, may explain their sensibility to milieu factors. (auth)

• Research Organization: Kantonsspitals, Zurich
• NSA Number: NSA-13-017747
• OSTI ID: 4263778
• Journal Information: Strahlentherapie (West Germany), Journal Name: Strahlentherapie (West Germany) Vol. Vol: 109; ISSN STRAA
• Country of Publication: Country unknown/Code not available
• Language: German

Related Subjects

AIR
ANIMAL CELLS
ATMOSPHERE
BIOLOGY AND MEDICINE
CARBON MONOXIDE
CYTOLOGY
DROSOPHILA
EFFICIENCY
GONADS
INSECTS
MUTATIONS
NITROGEN
OXYGEN
QUANTITY RATIO
RADIATION EFFECTS
RADIATION PROTECTION
SENSITIVITY
SPERM
SPERMATIDS
SPERMATOCYTES
SPERMATOGONIA
VARIATIONS