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FREQUENCY OF CHROMOSOME ABERRATIONS AS A FUNCTION OF IRRADIATION INTENSITY AND THE PHYSIOLOGICAL STATUS OF BARLEY SEEDS (in Russian)

Journal Article · · Izvestiya Akademii Nauk SSSR, Seriya Biologicheskaya (U.S.S.R.)
OSTI ID:4683043
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Seeds of two barley sorts, Odessa 17 and Hibernating Moscow, in organic and forced dormancy were exposed to gamma irradiation (Co/sup 60/, doses 12 and 15 kr, respectively 423 and 55 r/min--Odessa 17, and 301 and 43 r/min-Hibernating Moscow). In seeds of forced dormancy irrespective of the germination time (immediately following irradiation or after 72 hr) high dose rate yielded a distinctly increased percentage of root cells with chromosome aberrations as compared to low dose rate. In seeds irradiated in the natural state, the effect of dose rate was variable. In the roots of seeds artificially released from organic dormancy and immediately germinated, the percentage of cells with chromosome aberrations was similar both at a high and low irradiation intensity. In similar seeds germinated 10 days after release from organic dormancy the differences in intensity of irradiation were as complete as in seeds irradiated in forced dormancy. The effect of dose rate upon irradiation of air-dry seeds points to the conclusion that during irradiation some processes are going on in the seeds, which specify the degree of chromosome affection as manifested in aberrations in the dividing cells. The percentage of cells with chromosome aberrations depends on physical conditions of irradiation (such as type of radiation, magnitude, and power of the dose) and on the physiological state of the cells of the irradiated object. (P.C.H.)
Research Organization:
Inst. of Genetics, Moscow
NSA Number:
NSA-17-031902
OSTI ID:
4683043
Journal Information:
Izvestiya Akademii Nauk SSSR, Seriya Biologicheskaya (U.S.S.R.), Journal Name: Izvestiya Akademii Nauk SSSR, Seriya Biologicheskaya (U.S.S.R.) Vol. Vol: No. 4; ISSN IANBA
Country of Publication:
Country unknown/Code not available
Language:
Russian

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Related Subjects

AIR
BARLEY
BIOLOGY AND MEDICINE
CEREALS
CHROMOSOMES
COBALT 60
CYTOLOGY
ENERGY
GAMMA RADIATION
GERMINATION
HUMIDITY
MITOSIS
MUTATIONS
PHYSIOLOGY
PLANT CELLS
PLANTS
QUANTITY RATIO
RADIATION DOSES
RADIATION INJURIES
RADIATIONS
ROOTS
SEEDS
VARIATIONS