DIFFUSIBLE TOXIC COMPOUNDS IN RADIATION DAMAGE IN PLANTS

Journal Article · Wed Jan 01 04:00:00 EST 1958 · Biophysics (USSR) (English Translation)

OSTI ID:4275549

Pushkareva, M I

The preliminary experiments showed that x irradiation of bean root tips took 2 to 3 days to produce a macroscopically observable decrease in growth rate. Whether the effect was reversible or not depended on the dose. Co/sup 60/ gamma irradiation of dry seeds and seedlings of cucumbers, beans, hemp, and sunflower produced a reduction in root-hair and stem length varying exponentially with dose; the slope of the dose curve was greatest at 500 to 5000 r for 1 day old seedlings, and 1000 to 10 000 r for dry seeds. The sensitivity to Co/sup 60/ gamma rays also varied exponentially as a function of soaking time. The conclusions from the experiments on the indirect effects of radiation (i.e. on substances produced by irradiation) are given. No biologically active substances were observed to be transferred between irradiated and normal bean seedlings grown in succession in the same water. No such substances were found in water extracts of irradiated seedlings either. Normal seedlings were not affected by being grown side by side with irradiated ones. Narrow-beam x irradiation of the central root areas in bean seedlings did not affect the over-all lengths of the roots 6 to 7 days later, but the stems were somewhat shortened. The destruction of growth stimulants by irradiation was confirmed. (auth)

• Research Organization: Lomonosov State Univ., Moscow
• NSA Number: NSA-13-011550
• OSTI ID: 4275549
• Journal Information: Biophysics (USSR) (English Translation), Journal Name: Biophysics (USSR) (English Translation) Vol. Vol: 3
• Country of Publication: Country unknown/Code not available
• Language: English

Related Subjects

AGE
AUXINS
BIOLOGY AND MEDICINE
COBALT 60
GAMMA RADIATION
HORMONES
HUMIDITY
ORGANIC ACIDS
PLANT CELLS
PLANTS
QUANTITY RATIO
RADIATION DOSES
RADIATION EFFECTS
RADIOSENSITIVITY
RECOVERY
ROOTS
SEEDS
VARIATIONS
X RADIATION