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

Journal Article · Fri Jul 01 00:00:00 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), Vol. 25:4
• Country of Publication: United States
• Language: English

Related Subjects

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