Stereospecific responses to (R)-(+)- and (S)-(-)-quizalofop-ethyl in tissues of several plants

• Published in: Journal of Pesticide Science Vol. 11; no. 3; pp. 459 - 467
• Main Authors: Uchiyama, M, Washio, N. (Tokyo Univ. of Agriculture and Technology, Fuchu (Japan). Faculty of Agriculture), Ikai, T, Igarashi, H, Suzuki, K
• Format: Journal Article
• Language: English
• Published: Tokyo Pesticide Science Society of Japan 01.08.1986; Japan Science and Technology Agency
• Subjects: ACCION DE LOS PLAGUICIDAS; ACTION DES PESTICIDES; Biological and medical sciences; Chemical control; CHEMICAL STRUCTURE; CULTIVO DE TEJIDOS; CULTURE DE TISSUS; ESTRUCTURA QUIMICA; Fundamental and applied biological sciences. Psychology; HERBICIDAS; HERBICIDE; HERBICIDES; Parasitic plants. Weeds; PESTICIDE ACTIONS; Phytopathology. Animal pests. Plant and forest protection; PLANTAS; PLANTE; PLANTS; PLANTULAS; PLANTULE; SEEDLINGS; STRUCTURE CHIMIQUE; TISSUE CULTURE; Weeds; Avena sativa; Monocotyledones; Growth; Tissue culture; Nicotiana tabacum; Cereal crop; Site of action; Dose activity relation; Oryza sativa; Structure activity relation; Gramineae; Dicotyledones; Angiospermae; Solanaceae; Mechanism of action; Plant tissue; Zea mays; Weed; Glycine max; Biological activity; Herbicide; Oil plant(vegetal); Leguminosae; Industrial crop; Spermatophyta
• ISSN: 0385-1559; 1348-589X; 1349-0923
• DOI: 10.1584/jpestics.11.459

To get some information on the primary site of action of quizalofop-ethyl (ethyl 2-[4-(6-chloro-2-quinoxalinyloxy) phenoxy]propionate), effects on the growth of several intact plants and callus tissues and on the disruption of cellular membranes of stembase segments excised from untreated and herbicide-treated corn seedlings were studied using both (R)-(+)- and (S)-(-)-enantiomers of the herbicide. The growth of susceptible plants such as rice, oat and corn, was drastically reduced by the foliar application of the (R)-enantiomer at a dose of 6.25μg/plant, while the (S)-enantiomers showed only a little effect at a dose of 100μg/plant. Both 14C-labeled enantiomers showed similar translocation behavior in corn and barnyardgrass seedlings. The results suggested that receptor chirality is the source of the differential activities between the enantiomers.