Effects of dissolved organic carbon and second substrates on the biodegradation of organic compounds at low concentrations
Pseudomonas acidovorans and Pseudomonas sp. strain ANL but not Salmonella typhimurium grew in an inorganic salts solution. The growth of P. acidovorans in this solution was not enhanced by the addition of 2.0 ..mu..g of phenol per liter, but the phenol was mineralized. Mineralization of 2.0 ..mu..g of phenol per liter by P. acidovorans was delayed 16 h by 70 ..mu..g of acetate per liter, and the delay was lengthened by increasing acetate concentrations, whereas phenol and acetate were utilized simultaneously at concentrations of 2.0 and 13 ..mu..g/liter, respectively. Growth of Pseudomonas sp. in the inorganic salts solution was not affected by the addition of 3.0 ..mu..g each of glucose and aniline per liter, nor was mineralization of the two compounds detected during the initial period of growth. However, mineralization of both substrates by this organism occurred simultaneously during the latter phases of growth and after growth had ended at the expense of the uncharacterized dissolved organic compounds in the salts solution. In contrast, when Pseudomonas sp. was grown in the salts solution supplemented with 300 ..mu..g each of glucose and aniline, the sugar was mineralized first, and aniline was mineralized only after much of the glucose carbon was converted to CO/sub 2/. S. typhimurium failed to multiply in the salts solution with 1.0 ..mu..g of glucose per liter. It grew slightly but mineralized little of the sugar at 5.0 ..mu..g/liter, but its population density rose at 10 ..mu..g of glucose per liter or higher. The hexose could be mineralized at 0.5 ..mu..g/liter, however, if the solution contained 5.0 mg of arabinose per liter.
- Research Organization:
- Cornell Univ., Ithaca, NY
- OSTI ID:
- 5721780
- Journal Information:
- Appl. Environ. Microbiol.; (United States), Journal Name: Appl. Environ. Microbiol.; (United States) Vol. 49:4; ISSN AEMID
- Country of Publication:
- United States
- Language:
- English
Similar Records
Kinetics of p-nitrophenol mineralization by a Pseudomonas sp. : effects of sound substrates
Effect of SO/sub 2/ and bisulfite on heterotrophic activity in an acid soil
Related Subjects
63 RADIATION, THERMAL, AND OTHER ENVIRON. POLLUTANT EFFECTS ON LIVING ORGS. AND BIOL. MAT.
ACETATES
ALDEHYDES
AMINES
ANILINE
AROMATICS
BACTERIA
CARBOHYDRATES
CARBON
CARBOXYLIC ACID SALTS
ELEMENTS
GLUCOSE
GROWTH
HEXOSES
HYDROXY COMPOUNDS
MICROORGANISMS
MINERALIZATION
MONOSACCHARIDES
NONMETALS
ORGANIC COMPOUNDS
PHENOL
PHENOLS
PSEUDOMONAS
RESPONSE MODIFYING FACTORS
SACCHARIDES
SUBSTRATES