THE EFFECT OF SINGLE AND REPEATED X-RAY DOSES ON THE GROWTH AND DEVELOPMENT OF MAIZE

Journal Article · Mon Jan 01 04:00:00 EST 1962 · Tr. Inst. Genet., Akad. Nauk SSSR

OSTI ID:4628909

Tovmasyan, O V

Dry seeds of a midlate variety, Sterling zubovidnyj, and two early varieties, Belyaroye psheno and Rumynskaya zheltaya, were exposed to x-ray doses ranging from 1000 to 24000 r one month prior to sowing. The effects on different dosages on the growth and development of plants from the treated seeds and from untreated control seeds were recorded noting varietal differences in response. In Sterling and Rumynskaya zheltaya, the 1000--2000 r doses stimulated growth and reduced the length of the vegetative period. In Belyaroye psheno, the same doses increased percent germination and survival. Higher doses generally delayed growth, caused developmental anomalies and reduced grain set. It was noted that only Sterling survived the highest dose, while Rumynskaya zheltaya failed to survive doses of 14000 r or more. Tests in 1958 on Sterling showed that the stimulating effect of a 2000 r dose was inherited by plants of the following generation. However, this dosage rate depressed growth when seeds of Sterling were exposed to it in two successive seasons and the adverse effects of the 4000 r rate were substantially increased when irradiation was similarly repeated. The 4000 r dose was shown to decrease in size and to increase the sterility of pollen grains of Sterling. (OTS)

• Research Organization: Originating Research Org. not identified
• NSA Number: NSA-17-038844
• OSTI ID: 4628909
• Journal Information: Tr. Inst. Genet., Akad. Nauk SSSR, Journal Name: Tr. Inst. Genet., Akad. Nauk SSSR Vol. Vol: No. 29
• Country of Publication: Country unknown/Code not available
• Language: English

Related Subjects

BIOLOGY AND MEDICINE
CEREALS
GENETICS
MAIZE
POLLEN
RADIATION DOSES
RADIATION EFFECTS
REPRODUCTION
SEEDS
X RADIATION