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Activity and adaptation of nitrilotriacetate (NTA)-degrading bacteria: field and laboratory studiesAdaptation of bacterial activity for the degradation of nitrilotriacetate (NTA) was studied using natural sediment samples and an NTA-degrading bacterium (strain ATCC 29600). Sediment samples from a river with persistent levels of NTA had much higher NTA-degradative activity than comparable samples from a less contaminated control site. When sediment from the control site was exposed to high levels of NTA a 5 day lag preceded an abrupt increase in NTA degradation while strain 29600 colonized on sand and grown in the absence of NTA became induced within eight hours. The induction of strain 29600 was compared between bacteria in suspension and cells attached to sand. The sand-associated bacteria became induced 4 to 5 h before the planktonic suspension and displayed over threefold greater specific activity. Suspensions of strain 29600 became adapted within 8 h when placed in membrane diffusion chambers that were immersed within a municipal wastewater reactor containing NTA. These findings support the concept that induction is a part of the process of bacterial adaptation to degrade NTA and sand-associated bacteria can adapt more quickly to and have a greater degradative activity for NTA than planktonic cells.
Document ID
20040090391
Document Type
Reprint (Version printed in journal)
Authors
McFeters, G. A.
(Montana State University Bozeman 59717)
Egli, T.
Wilberg, E.
Alder, A.
Schneider, R.
Suozzi, M.
Giger, W.
Date Acquired
August 21, 2013
Publication Date
July 1, 1990
Publication Information
Publication: Water research
Volume: 24
Issue: 7
ISSN: 0043-1354
Subject Category
Environment Pollution
Distribution Limits
Public
Copyright
Other
Keywords
NASA Discipline Number 04-10
NASA Discipline Environmental Health
Non-NASA Center

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