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Titolo:
Involvement of cytochrome P-450 enzyme activity in the selectivity and safening action of pyrazosulfuron-ethyl
Autore:
Yun, MS; Shim, IS; Usui, K;
Indirizzi:
Natl Agr Res Ctr, Dept Farmland Utilizat, Upland Weed Lab, Tsukuba, Ibaraki 3058666, Japan Natl Agr Res Ctr Tsukuba Ibaraki Japan 3058666 ba, Ibaraki 3058666, Japan Univ Tsukuba, Inst Appl Biochem, Tsukuba, Ibaraki 3058572, Japan Univ Tsukuba Tsukuba Ibaraki Japan 3058572 sukuba, Ibaraki 3058572, Japan
Titolo Testata:
PEST MANAGEMENT SCIENCE
fascicolo: 3, volume: 57, anno: 2001,
pagine: 283 - 288
SICI:
1526-498X(200103)57:3<283:IOCPEA>2.0.ZU;2-W
Fonte:
ISI
Lingua:
ENG
Soggetto:
HERBICIDE; METABOLISM; CHLORSULFURON; PRIMISULFURON; TRIASULFURON; WHEAT; CORN; DICLOFOP; MAIZE; MODE;
Keywords:
sulfonylurea selectivity; safening action; cytochrome P-450; pyrazosulfuron-ethyl O-demethylase;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Agriculture,Biology & Environmental Sciences
Citazioni:
28
Recensione:
Indirizzi per estratti:
Indirizzo: Yun, MS Natl Agr Res Ctr, Dept Farmland Utilizat, Upland Weed Lab, 3-1-1 Kannondai, Tsukuba, Ibaraki 3058666, Japan Natl Agr Res Ctr 3-1-1 Kannondai Tsukuba Ibaraki Japan 3058666 pan
Citazione:
M.S. Yun et al., "Involvement of cytochrome P-450 enzyme activity in the selectivity and safening action of pyrazosulfuron-ethyl", PEST MAN SC, 57(3), 2001, pp. 283-288

Abstract

To investigate the selectivity and safening action of the sulfonylurea herbicide pyrazosulfuron-ethyl (PSE), pyrazosulfuron-ethyl O-demethylase (PSEOD) activity involving oxidative metabolism by cytochrome P-450 was studied in rice (Oryza sativa L cv Nipponbare) and Cyperus serotinus Rottb. Cytochrome P-450-dependent activity was demonstrated by the use of the inducers 1,8-naphthalic anhydride and ethanol, the herbicides PSE, bensulfuron-methyl,dimepiperate and dymron, or the inhibitor piperonyl butoxide (PBO). Growthinhibition in C serotinus seedlings was more severe than that in rice seedlings. O-Dealkylation activities of PSE were induced differently in rice and in C serotinus, with distinctly higher activity in rice seedlings. The induced PSEOD activities were slightly inhibited by PBO in rice seedlings, whereas they were strongly inhibited in C serotinus seedlings. Dimepiperate and dymron were effective safeners of rice against PSE treatment. Treatmentswith herbicide alone resulted in less induction of PSEOD activity comparedwith combined treatments of the herbicide and safener. PSEOD activity in rice seedlings induced with herbicide alone was strongly inhibited by PBO, whereas it was weakly inhibited in rice seedlings induced with combinations of PSE and two safeners. These results suggest that O-demethylation by cytochrome P-450 enzymes may be involved in the metabolism of PSE and may contribute to its selectivity and safening action. Furthermore, these results suggest the existence of a multiple form of cytochrome P-450 in plants. (C) 2001 Society of Chemical Industry.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 01/04/20 alle ore 11:49:43