Alteration of diphenamid metabolism in tomato by ozone

Journal Article · Thu Nov 01 04:00:00 EST 1973 · Weed Sci.; (United States)

OSTI ID:6498949

Hodgson, R H; Frear, D S; Swanson, H R; Regan, L

Fumigation of tomato (Lycopersicon esculentum Mill. Sheyenne) with low levels of O/sub 3/ had little effect on root absorption, translocation, or conversion of diphenamid (N,N-demethyl-2,2-diphenylacetamide) to water-soluble conjugates. However, the proportion of specific conjugates was markedly altered in O/sub 3/-fumigated plants. Twenty-four hours after treatment, the predominant conjugates formed in nonfumigated and fumigated tomato were the ..beta..-glucoside (MDAG), and the ..beta..-gentiobioside (MDAGB), respectively, on N-hydroxymethyl-N-methyl-2,2-diphenylacetamide. The ratio MDAG:MDAGB was 8.2:1.0 in nonfumigated tissue and 0.6:1.0 in O/sub 3/-fumigated tissue. This marked shift toward production of the more polar MDAGB was accompanied by a trend toward increased production of methanol-insoluble residues. A compound having limited stability was extracted from tomato; its probable structure was N-hydroxymethyl-N-methyl-2,2-diphenylacetamide (MODA). It is a postulated intermediate in the formation of MDAG and MDAGB from diphenamid.

• Research Organization: Dept. of Agricultural, Fargo, ND
• OSTI ID: 6498949
• Journal Information: Weed Sci.; (United States), Journal Name: Weed Sci.; (United States) Vol. 21:6; 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.
AIR POLLUTION
BIOCHEMISTRY
BIOLOGICAL EFFECTS
CHEMISTRY
FOOD
METABOLISM
OZONE
PLANTS
POLLUTION
TOMATOES
VARIATIONS
VEGETABLES