THE INFLUENCE OF SEED STORAGE ON THE TERMINAL EFFECT OF GAMMA IRRADIATION (Co$sup 60$)

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

OSTI ID:4657523

Tushnyakova, M M

Seeds of two varieties of oats, Avena sativa and A. nuda, were treated with x-ray doses ranging from 15000 to 30000 r. In the case of A. nuda, seed of the previous harvest and seed stored for 5 years were used but only fresh seed of A. sativa was treated. One portion of the 5-year old A. nuda was irradiated on April 7, 1958, and sown 4 weeks later together with control non-irradiated seed. The 15 kr dose slightly reduced germination and survival and induced morphological and physiological variability. Although the seeds set, their yield was markedly lower than in the controls. The effects were augmented when higher doses were applied. Germination was reduced by approximately 10% for each 5 kr increment in dose. In contrast, the reduction in survival with increasing dose displayed geometric progression, falling from 80% at 15 kr to 27.55 at 20 kr and 0.5% at 25 kr. The control material showed 90.5% germination and 99.4% survival. A similar pattern was observed when fresh A. nuda seed of the previous harvest was irradiated and then stored for two years. Subsequent sowing tests showed that the germination and survival capacity of the material gradually decreased during storage, particularly when higher dosage rates were used. Similar results were obtained with A. sativa seed. Thus when seed was exposed to 25 kr and stored for 14 months, survival capacity was nil, except when gibberellic acid or various other chemicals were used to treat seed after irradiation, in which case 1-- 3% survival was noted. (OTS)

• Research Organization: Originating Research Org. not identified
• NSA Number: NSA-17-038845
• OSTI ID: 4657523
• 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
CHEMICALS
COBALT 60
GAMMA RADIATION
GIBBERELLIC ACID
OATS
RADIATION DOSES
RADIATION EFFECTS
REPRODUCTION
SEEDS
STORAGE
X RADIATION