EFFECTS OF TEMPERATURE ON THE FREQUENCY OF SOMATIC MUTATIONS INDUCED BY X RAYS IN MAIZE SEEDLINGS

Journal Article · Mon Jan 01 04:00:00 EST 1962 · Atti Associazone Genetica Italiana (Italy)

OSTI ID:4791871

Blanchi, A; Contin, M

The frequency of yellow-green sectors on the green background of maize seedlings heterozygous Yg/sub 2//yg/sub 2/ (yg/sub 2/= yellow-green-2 on short arm of chromosome 9) was used as a criterion of measuring somatic mutation rate induced by x irradiation (3-8 kr) on seeds possessing 4 (dry seeds) or 11% (normal seeds) water content at different temperatures. With dry seeds the mutation rate was the same at -70 and 20 deg C, but dropped significantly and linearly passing from 20 to 30 deg , 50 and 65 deg C. Such decreases were great for the third leaf, moderate for leaf four, and slight for leaf five. In seedlings sprouted from seed irradiated with 11% moisture content, the sensitiviiy plateau of the dry seeds, between -70 and 20 deg C was missing, since the mutation rate of 20 deg C was already clearly decreased as compared with that of -70 deg C. (auth)

• Research Organization: Universita, Milan
• NSA Number: NSA-16-028765
• OSTI ID: 4791871
• Journal Information: Atti Associazone Genetica Italiana (Italy), Journal Name: Atti Associazone Genetica Italiana (Italy) Vol. Vol: 7; ISSN AAGNA
• Country of Publication: Country unknown/Code not available
• Language: Italian

Related Subjects

BIOLOGY AND MEDICINE
CEREALS
CHROMOSOMES
GENETICS
HUMIDITY
MAIZE
MUTATIONS
PLANT CELLS
PLANTS
QUANTITY RATIO
RADIATION EFFECTS
RADIOSENSITIVITY
SEEDS
TEMPERATURE
X RADIATION