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Titolo:
Mode of action of new diethylamines in lycopene cyclase inhibition and in photosystem II turnover
Autore:
Fedtke, C; Depka, B; Schallner, O; Tietjen, K; Trebst, A; Wollweber, D; Wroblowsky, HJ;
Indirizzi:
Bayer AG, Landwirtschaftszentrum Monheim, Gesschaftsbereich Pflanzenschutz, D-51368 Leverkusen, Germany Bayer AG Leverkusen Germany D-51368 nschutz, D-51368 Leverkusen, Germany Ruhr Univ Bochum, D-44780 Bochum, Germany Ruhr Univ Bochum Bochum Germany D-44780 Bochum, D-44780 Bochum, Germany
Titolo Testata:
PEST MANAGEMENT SCIENCE
fascicolo: 3, volume: 57, anno: 2001,
pagine: 278 - 282
SICI:
1526-498X(200103)57:3<278:MOAOND>2.0.ZU;2-D
Fonte:
ISI
Lingua:
ENG
Soggetto:
HERBICIDE TARGET; RAPID TURNOVER; CAROTENE;
Keywords:
herbicide mode of action; lycopene cyclase; MPTA; CPTA; NDUA; N,N-diethylamines, D1 protein, photosystem II, beta-carotene;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Agriculture,Biology & Environmental Sciences
Citazioni:
11
Recensione:
Indirizzi per estratti:
Indirizzo: Tietjen, K Bayer AG, Landwirtschaftszentrum Monheim, Gesschaftsbereich Pflanzenschutz, D-51368 Leverkusen, Germany Bayer AG Leverkusen Germany D-51368 51368 Leverkusen, Germany
Citazione:
C. Fedtke et al., "Mode of action of new diethylamines in lycopene cyclase inhibition and in photosystem II turnover", PEST MAN SC, 57(3), 2001, pp. 278-282

Abstract

The new bleaching herbicidal compound N,N-diethyl-N-(2-undecynyl)amine (NDUA) is identified here as an inhibitor of lycopene cyclase and is compared with the known cyclase inhibitors N,N-diethyl-N-[2-(4-chlorophenylthio)ethyl]amine (CPTA) and N,N-diethyl-N-[2-(4-methylphenoxy)ethyl]amine (MTPA). HPLC separation of chloroplast pigments shows lycopene accumulation in NDUA treated tissue. Variation in chain length of the undecynylamine moeity of NDUA from 7 to 21 C atoms reveals an optimum of 11 to 14 C atoms for herbicidal activity. A series of seven further analogues of NDUA and CPTA reveals the structural elements necessary for inhibition of lycopene cyclase, The effect of NDUA derivatives on photosynthesis has been studied in Chlamydomonas reinhardtii. Photosynthesis is highly sensitive, particularly towards theC14 and longer chain length analogues at nanomolar concentrations. It is shown that the breakdown of photosynthesis by NDUA is due to interference with the turnover of the D1 protein of the photosystem II reaction centre that requires the continous biosynthesis of the two reaction-centre beta -carotene moieties in the reassembly phase. The D1 protein disappearance is mostmarked under strong light conditions. The depletion of photosystem II occurs before total pigment bleaching. This newly recognized mechanism in herbicidal activity is also the basis for the mode of action of other lycopene cyclase inhibitors as well as phytoene desaturase inhibitors. (C) 2001 Society of Chemical Industry.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 09/07/20 alle ore 17:57:39