Effects of light and ethylene on the herbicidal action of acifluorfen

• Published in: Pesticide biochemistry and physiology Vol. 42; no. 3; pp. 271 - 278
• Main Authors: Abdallah, M.M.F., Bayer, D.E., Elmore, C.L.
• Format: Journal Article
• Language: English
• Published: San Diego, CA Elsevier Inc 01.03.1992; Elsevier
• Subjects: ACIFLUORFEN; ACIFLUORFENE; Agronomy. Soil science and plant productions; ANTIMETABOLITE; ANTIMETABOLITOS; Biological and medical sciences; Chemical control; COTILEDONES; COTYLEDON; CUCUMIS SATIVUS; DIOXIDO DE CARBONO; DIOXYDE DE CARBONE; ECHANGE GAZEUX; ETHYLENE; ETILENO; FITOTOXICIDAD; Fundamental and applied biological sciences. Psychology; INTERCAMBIO DE GASES; LUMIERE; LUZ; OBSCURIDAD; OBSCURITE; Parasitic plants. Weeds; Phytopathology. Animal pests. Plant and forest protection; PHYTOTOXICITE; SUBSTANCE DE CROISSANCE VEGETALE; SUSTANCIAS DE CRECIMIENTO VEGETAL; Weeds; Light effect; Phenyl ether derivatives; Cotyledon; Hydrocarbon; Interaction; Plant juvenile growth stage; Cucurbitaceae; Ethylene; Environmental factor; Cucumis sativus; Biological activity; Herbicide; Phytotoxicity; Vegetable crop; Biochemical reaction; Dicotyledones; Angiospermae; Plant growth substance; Spermatophyta; Fluorine Organic compounds
• ISSN: 0048-3575; 1095-9939
• DOI: 10.1016/0048-3575(92)90103-7

Fully expanded cotyledons from 7-day-old cucumber ( Cucumis sativis L. cv Ashy) seedlings were used to study the interaction of light and ethylene on the herbicidal action of acifluorfen (5-[2-chloro-4-(trifluoromethyl)phenoxy]-2-nitrobenzoic acid). Acifluorfen alone increased the level of ethylene production from cucumber cotyledons. The stimulation was most pronounced after 12 hr in the light as compared to continuous dark. The evolution of ethylene induced by acifluorfen was complete by 48 hr after treatment. Symptoms resulting from acifluorfen treatment developed rapidly in light, while no visible symptoms developed in the dark treatment. Cotyledons treated with acifluorfen showed a corresponding increase in carbon dioxide production. An ethylene inhibitor, α-aminooxyacetic acid (AOA), inhibited ethylene production in acifluorfen-treated cucumber cotyledons. In addition it reduced the visual injury induced by this herbicide. Cucumber cotyledons treated with AOA alone or in combination with acifluorfen showed higher carbon dioxide production 4 hr following treatment. This effect was more pronounced in the light than in the dark. Amino-cyclopropane-1-carboxylic acid (ACC), an ethylene precursor, increased the production of ethylene in cucumber cotyledons in both light and dark conditions. However, ethylene production was increased approximately fourfold in the dark during the early stages of the experiment. Acifluorfen in combination with ACC increased ethylene production fourfold in light as compared to ACC alone. ACC alone did not increase carbon dioxide; however, ACC plus acifluorfen did increase carbon dioxide production.