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 behavior of C. glutamicum grown on fructose, characterized by a prolonged period of accelerating 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.
journal_name
Biodegradationjournal_title
Biodegradationauthors
Girbal L,Rols JL,Lindley NDdoi
10.1023/a:1011682714928subject
Has Abstractpub_date
2000-01-01 00:00:00pages
371-6issue
6eissn
0923-9820issn
1572-9729journal_volume
11pub_type
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