CHANGES IN LIPID METABOLISM OF PLANTS UNDER THE EFFECT OF IONIZING RADIATION
A higher sensitivity to the effect of ionizing radiation has been determined in lipoxidsse activity in vivo leaves of plants, and changes in lipoxidase activity were induced by significantly lower doses (30-50%) in in vivo than in in vitro tests. A phase of enzyme system activation by comparatively lower doses of irradiation and shorter incubation period after irradiation was also noted. It was established that changes in the relative permeability of leaves of plant sprouts due to the effect of ionizing radiations, which confirm the presence of disturbances in the internal cellular structure, facilitate the leakage of electrolytes into the external medium. A change in the over-all permeability, or a change in the intenaal structure, probably leads to the changes observed in the activity of lipoxidase after the irradiation of plant sprouts. A significant increase was noted in the quantity of peroxides of unsaturated fatty acids after the exposure of sprout leaves of beans and barley to low doses of irradiation (1,000r) which was probably due to enzymatic effect. One may postulate that the significant physiological effect and the toxic property of peroxides of unsaturated fatty acids play a great role in the intoxication of plants under radiation effects. (auth)
- Research Organization:
- Academy of Sciences, Moscow
- NSA Number:
- NSA-13-020815
- OSTI ID:
- 4236483
- Journal Information:
- Biokhimiya, Journal Name: Biokhimiya Vol. Vol: 23
- Country of Publication:
- Country unknown/Code not available
- Language:
- English
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