Metabolism of carbon in soybean

Conference · Tue Oct 01 04:00:00 EDT 1996

OSTI ID:369962

Johnson, K A; McManus, E E; Conboy, J J ^[1]

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1. Uniroyal Chemical Co., Middlebury, CT (United States); and others

The distribution and metabolism of {sup 14}C-carboxin [5,6 dihydro-2-methyl-N-phenyl-1,4-oxathiin-3-carboxamide] in the food and feed commodities of soybean were determined. Soybeans were grown to maturity indoors from seeds treated with {sup 14}C-carboxin at the normal use rate (1X) and two exaggerated rates (5X and 10X). The level of radioactivity was highest in the foliage, (12.5 ppm, 110 ppm, and 169 ppm for the low to high dose groups, respectively), and lowest in the seeds, (0.51 ppm, 2.077 ppm and 4.63 ppm, respectively). Extractable radioactivity accounted for approx. 75, 80, and 90% in the pods, seed, and foliage, respectively. Enzymatic hydrolysis of the post extracted solids released an additional 10, 15, and 5% radioactivity for the sum matrices, respectively. The major routes of metabolism were characterized by the oxidation of sulfur, cleavage of the oxathiim ring, and conjugation with glucose as shown below. These metabolites in soybean represent the most extensive modifications of carboxin observed in any plant system studied.

• OSTI ID: 369962
• Report Number(s): CONF-960376--
• Country of Publication: United States
• Language: English

Related Subjects

55 BIOLOGY AND MEDICINE
BASIC STUDIES
AMIDES
ENZYMATIC HYDROLYSIS
FOOD
LABELLED COMPOUNDS
METABOLISM
METABOLITES
ORGANIC SULFUR COMPOUNDS
RADIOACTIVITY
SEEDS
SOYBEANS
TRACER TECHNIQUES