RADIOBIOLOGICAL STUDIES IN PLANTS. VIII. RADIOSENSITIVITY OF PLANTS CULTURED UNDER PHOSPHORUS DEFICIENT CONDITIONS

Journal Article · Fri Feb 01 04:00:00 EST 1963 · Nippon Idengaku Zasshi

OSTI ID:4659910

Nishiyama, I; Amano, E

Diploid oats of an early mutant strain were grown for some generations in granite sand supplied with Kasai's nutrient solution or with that lacking phosphate. The latter showed typical symptoms of P-deficiency, that is, inhibition of plant growth. However, no evident effect of Pdeficiency was found that was attributable to chromosomal abnormalities or gene mutations. When young panicles of these P-deficient plants were irradiated with 250 r of x rays, the panicles in the full growth were apparently shorter than those of the plants which were not irradiated. Also a slight increase in the frequency of chromosome aberrations in the pollen mother cells of P-deficient plants was observed. Dry seeds obtained froni P-deficient plants were irradiated with 10-70 kr of x rays. No seeds having a dose of 40 kr or more germinated. In 16 day old seedlings, P- deficient ones showed a higher radiosensitivity than the controls at the dose of 30 kr, as indicated by the reduced survival rate and plant height in the former. A slight increase in mutation rate was found in the X/sub 2/ progenies of P- deficient plants though it was not statistically significant. (auth)

• Research Organization: Kyoto Univ.
• NSA Number: NSA-17-037091
• OSTI ID: 4659910
• Journal Information: Nippon Idengaku Zasshi, Journal Name: Nippon Idengaku Zasshi Vol. Vol: 38
• Country of Publication: Country unknown/Code not available
• Language: English

Related Subjects

AGE
BIOLOGY AND MEDICINE
CEREALS
CHROMOSOMES
MUTATIONS
OATS
PHOSPHATES
PLANT CELLS
PLANTS
POLLEN
QUANTITY RATIO
RADIATION DOSES
RADIATION EFFECTS
RADIOBIOLOGY
RADIOSENSITIVITY
SEEDS
SOILS
VARIATIONS
X RADIATION