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Main Title Dissolved Free Amino Acids, Combined Amino Acids, and DNA as Sources of Carbon and Nitrogen to Marine Bacteria.
Author Joergensen, N. O. G. ; Kroer, N. ; Coffin, R. B. ; Yang, X. H. ; Lee, C. ;
CORP Author Environmental Research Lab., Gulf Breeze, FL. ;Kongelige Veterinaer- og Landbohoejskole, Frederiksberg (Denmark). Dept. of Ecology and Molecular Biology. ;National Environmental Research Inst., Charlottenlund (Denmark). Div. of Marine Ecology and Microbiology. ;State Univ. of New York at Stony Brook. Marine Sciences Research Center.
Publisher c1993
Year Published 1993
Report Number EPA/600/J-94/006;
Stock Number PB94-140746
Additional Subjects Amino acids ; Deoxyribonucleic acid ; Bacteria ; Marine biology ; Carbon ; Nitrogen ; Cycles ; Metabolism ; Organic matter ; Ammonia ; Nitrogen oxides ; Assimilation ; Aquatic ecosystems ; Production ; Graphs(Charts) ; Nitrogen organic compounds ; Reprints ; Carbon budget
Library Call Number Additional Info Location Last
NTIS  PB94-140746 Some EPA libraries have a fiche copy filed under the call number shown. 07/26/2022
Collation 15p
Utilization of naturally-occurring dissolved free and combined amino acids (DFAA and DCAA) and dissolved DNA (D-DNA) was studied in batch cultures of bacteria from 2 shallow marine environments, Santa Rosa Sound (SRS), Florida, USA, and Flax Pond (FP), Long Island, New York, USA. In addition to control experiments, cultures were enriched with various sources of C and N. In the SRS cultures, net C assimilation of DCAA, DFAA and D-DNA made up from 42 to 60% of net bacterial C production. The average, relative incorporation of C from DCAA, DFAA and D-DNA was 0.13, 0.77 and 0.10, respectively. The corresponding values of N were 0.10, 0.81 and 0.09. Addition of NH4(+), DFAA, or both, increased the incorporation of DCAA, DFAA and D-DNA. Incorporation of N from DCAA, DFAA and D-DNA equaled 111 to 219% of the bacterial N production. Including incorporation of NH4(+) and release of NO3(-), calculated net bacterial N incorporation made up 48 and 290% of bacterial N production. In the FP experiment, net assimilation of DCAA, DFAA and D-DNA equaled 66 to 91% (average 77%) of net bacterial C production. Largely all C incorporation was due to assimilation of DFAA. (Copyright (c) Inter-Research 1993.)