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Titolo:
Growth rate influences reductive biodegradation of the organophosphorus pesticide demeton by Corynebacterium glutamicum
Autore:
Girbal, L; Rols, JL; Lindley, ND;
Indirizzi:
Inst Natl Sci Appl, Ctr Bioingn Gilbert Durand, Lab Biotechnol Bioproc, CNRS,UMR 5504, F-31077 Toulouse 4, France Inst Natl Sci Appl Toulouse France 4 MR 5504, F-31077 Toulouse 4, France Inst Natl Sci Appl, Ctr Bioingn Gilbert Durand, UR INRA 792, F-31077 Toulouse, France Inst Natl Sci Appl Toulouse France F-31077 792, F-31077 Toulouse, France
Titolo Testata:
BIODEGRADATION
fascicolo: 6, volume: 11, anno: 2000,
pagine: 371 - 376
SICI:
0923-9820(2000)11:6<371:GRIRBO>2.0.ZU;2-3
Fonte:
ISI
Lingua:
ENG
Soggetto:
TRICHOSPORIUM OB3B; CARBON-FLUX; A-STAT; COMETABOLISM; METABOLISM; CHEMOSTAT;
Keywords:
accelerostat; biotransformation; co-metabolism; Corynebacterium glutamicum; demeton-S-methyl; growth rate; organophosphorus compounds;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Agriculture,Biology & Environmental Sciences
Citazioni:
14
Recensione:
Indirizzi per estratti:
Indirizzo: Girbal, L Inst Natl Sci Appl, Ctr Bioingn Gilbert Durand, Lab Biotechnol Bioproc, CNRS,UMR 5504, 135 Ave Rangueil, F-31077 Toulouse 4, France Inst Natl Sci Appl 135 Ave Rangueil Toulouse France 4 4, France
Citazione:
L. Girbal et al., "Growth rate influences reductive biodegradation of the organophosphorus pesticide demeton by Corynebacterium glutamicum", BIODEGRADAT, 11(6), 2000, pp. 371-376

Abstract

The organophosphorous pesticide, demeton-S-methyl was transformed by Corynebacterium glutamicum in co-metabolism with more readily degradable substrates. Glucose, acetate and fructose were tested as growth substrates, and the highest demeton-S-methyl biotransformation average rate (0.78 mg l(-1) h(-1)) and maximum instantaneous rate (1.4 mg l(-1) h(-1)) were achieved on fructose. This higher efficiency seems to be linked to the atypical behaviorof C. glutamicum grown on fructose, characterized by a prolonged period ofaccelerating growth instead of a constant growth rate observed on glucose or acetate. More precisely, for growth rates in the 0.1-0.4 h(-1) range, a direct coupling between the specific demeton-S-methyl consumption rate and the growth rate was demonstrated on fructose during batch -, steady state continuous - or continuous cultures with a controlled transient growth rate (accelerostat technology). The demeton-S-methyl biotransformation was more favoured during an acceleration phase of the growth rate.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 27/09/20 alle ore 22:12:11