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RESEARCH PRODUCT
Phytotoxicity and metabolism of chlortoluron in two wheat varieties
F. CabanneRené ScallaP. Gaillardonsubject
0106 biological sciences[SDV]Life Sciences [q-bio]Health Toxicology and MutagenesisMetaboliteBiology01 natural scienceschemistry.chemical_compoundPoaceaeCultivarComputingMilieux_MISCELLANEOUS2. Zero hunger04 agricultural and veterinary sciencesGeneral MedicineMetabolismCHLOTOLURONDimethylurea[SDV] Life Sciences [q-bio]chemistryAgronomyChlorophyllChlortoluron040103 agronomy & agriculture0401 agriculture forestry and fisheriesPhytotoxicityAgronomy and Crop Science010606 plant biology & botanydescription
Abstract Varietal susceptibility of winter wheat to chlortoluron, 1-(3-chloro-4-methylphenyl)-3,3 dimethylurea, has been studied in two varieties, Corin (susceptible) and Clement (tolerant). After a 24-hr root absorption of the herbicide, phytotoxicity was estimated from growth measurements. When administered at 12 to 96 μM concentrations, the herbicide reduced the growth of both varieties. A significant selective effect was found at 96 μM. Measurements of chlorophyll fluorescence-induction kinetics allowed to discriminate between the two varieties treated with 12 to 48 μM chlortoluron. The metabolism of chlortoluron was studied following absorption of 24 μM solutions. Both varieties produced the same pattern of metabolites but the tolerant variety degraded the herbicide and the phytotoxic mono-N-demethylated metabolite at a slightly higher rate. An unexpected result was that the more susceptible variety possessed a very significant ability to metabolize chlortoluron. In conclusion, it appears that further studies are necessary before deciding whether the differences in susceptibility of the two varieties can be explained by the only metabolic factor.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 1985-04-01 | Pesticide Biochemistry and Physiology |