Diphenamid metabolism in pepper and an ozone effect. I. Absorption, translocation, and the extent of metabolism

Journal Article · Fri Jul 01 04:00:00 EDT 1977 · Weed Sci.; (United States)

OSTI ID:5651205

Hodgson, R H; Hoffer, B L

Nutrient-solution-grown pepper (Capsicum frutescens L. Early Calwonder) absorbed 62% of the diphenamid (N,N-dimethyl-2,2-diphenylacetamide) supplied via the roots for 48 h, and 74% in 150 h. Extensive translocation accompanied absorption, and 70 +/- 3% of the absorbed /sup 14/C was present in shoots of plants harvested after 24- to 150-h treatments. Diphenamid was metabolized rapidly to chloroform-soluble and water-soluble compounds, and to unextracted residues. Chloroform-soluble compounds persisted for 150 h and accounted for more than 50% of the /sup 14/C in leaves. Water-soluble compounds other than N-hydroxymethyl-..beta..-D-glycosides accounted for 25% of the water-soluble metabolites in leaves of nonfumigated plants. Ozone fumigation did not affect diphenamid absorption or translocation significantly. In leaves, ozone-enhanced accumulation of water-soluble metabolites more polar than N-hydroxymethyl-N-methyl-2,2-diphenylacetamide-..beta..-D-glucoside (MDAG) and unextracted residues was observed. Ozone fumigation reduced the accumulation of these /sup 14/C-fractions in roots. 16 references, 1 figure, 3 tables.

• Research Organization: Dept. of Agriculture, Fargo, ND
• OSTI ID: 5651205
• Journal Information: Weed Sci.; (United States), Journal Name: Weed Sci.; (United States) Vol. 25:4; ISSN WEESA
• Country of Publication: United States
• Language: English

Related Subjects

560303* -- Chemicals Metabolism & Toxicology-- Plants-- (-1987)
63 RADIATION, THERMAL, AND OTHER ENVIRON. POLLUTANT EFFECTS ON LIVING ORGS. AND BIOL. MAT.
ABSORPTION
ACETAMIDE
AMIDES
BETA DECAY RADIOISOTOPES
BETA-MINUS DECAY RADIOISOTOPES
BIOLOGICAL EFFECTS
BIOLOGICAL LOCALIZATION
CAPSICUM
CARBON 14
CARBON ISOTOPES
EVEN-EVEN NUCLEI
HERBICIDES
ISOTOPE APPLICATIONS
ISOTOPES
LIGHT NUCLEI
METABOLISM
METABOLITES
NUCLEI
ORGANIC COMPOUNDS
ORGANIC NITROGEN COMPOUNDS
OZONE
PESTICIDES
PLANTS
RADIOISOTOPES
ROOT ABSORPTION
TRACER TECHNIQUES
TRANSLOCATION
UPTAKE
YEARS LIVING RADIOISOTOPES