INCORPORATION OF Sr$sup 90$-Y$sup 90$ IN PLANTS: RADIOAUTOGRAPHIC STUDY OF INCORPORATION IN VICIA FABA

Journal Article · Sun Jan 01 04:00:00 EST 1961 · Rev. publs. navales

OSTI ID:4778890

Nunez, C

Studies performed in Vicia faba using radioautographic techniques orientated to demonstrate the Sr-90 metabolism, showed the active circulation of the radioelement in the conduction (vascular) system of the plant which contrasts with a low cell incorporation of Sr-90 showed by citoradioautographs. In radioautographs of high resolution, memeristematic cells showed a low protoplasmatic incorporation around the nucleus, with an aspect of perinuclear crown. Radioautographs of stem and leaves showed a progressive and strong decrease of circulation through feeble or nega tive macroradioautographs and negative citoradioautographs. These findings suggest that the radioelement circulates actively through the plant without metabolization in parenchymatic tissues or, at least, in a very feeble condition in cellular groups with a very high metabolic activity (meristematic cells of the root), and that Sr-90 distribution is highly reduced in stem and leaves. This behavior would confirm the importance of direct deposition mechanism of Sr-90 from fall-out on the surface of leaves in the first step of food chains. (auth)

• Research Organization: Originating Research Org. not identified
• NSA Number: NSA-16-031462
• OSTI ID: 4778890
• Journal Information: Rev. publs. navales, Journal Name: Rev. publs. navales Vol. Vol: 14
• Country of Publication: Country unknown/Code not available
• Language: Spanish

Related Subjects

BIOLOGY AND MEDICINE
CYTOLOGY
FALLOUT
METABOLISM
PLANT CELLS
PLANTS
QUANTITY RATIO
RADIOAUTOGRAPHY
ROOTS
STRONTIUM 90
VICIA FABA
YTTRIUM 90