DOSE-RATE DEPENDENCE OF INSTANTANEOUS PHYSIOLOGICAL RADIATION EFFECTS
Nastic movements in Mimosa pudica were induced by x radiation. Using short radiation impulses of 10 to 30 sec and doses up to 120 kr/min, the leaflets were observed to close and the stem to bend in the main joint during the first minute. After irradiation of parts of the leaflet, the reaction spreads along the physiological pathways as in any other stimulus. When the action potential is completed, slow depolarization continues and reaches a maximum, finally returning to the initial value in about two hr. The effect was found to be dose- dependent. It is hypothesized that either a direct physicochemical change of the cell membrane or a damage of substances which influence the function of the cell membrane is induced by the irradiation. (H.M.G.)
- Research Organization:
- Universitat, Munich
- Sponsoring Organization:
- USDOE
- NSA Number:
- NSA-18-019574
- OSTI ID:
- 4024992
- Journal Information:
- Annals of the New York Academy of Sciences (U.S.), Vol. Vol: 114; Other Information: Orig. Receipt Date: 31-DEC-64
- Country of Publication:
- Country unknown/Code not available
- Language:
- English
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