caa a22 4500 397552785 CHVBK 20180308164754.0 cr unu---uuuuu 161202e199611 xx s 000 0 eng 10.1111/j.1574-6941.1996.tb00349.x doi (NATIONALLICENCE)oxford-10.1111/j.1574-6941.1996.tb00349.x Effects on microbial activity by extraction of indigenous cells from soil slurries [Elektronische Daten] [Viggo Lindahl, Kari Aa, Rolf A. Olsen] Possible effects on the physiological activity and culturability of soil microorganisms by different soil dispersion procedures, and effects on activity caused by extracting bacteria from soil, were investigated. There was no apparent difference in cfu's with dispersion of a silty loam soil and a loamy sand soil with pyrophosphate as compared to dispersion in NaCl. Substrate-induced respiration was reduced in the silty loam soil, and methanol oxidation was reduced in the loamy sand soil with dispersion in pyrophosphate, and the soil pH was irreversibly increased by the treatment. Extracted bacterial fractions had lower numbers of culturable cells as percentage of the total number of bacteria in each fraction, lower respiration rates and no methanol oxidation activity as compared to the soil slurry both before and after extraction. The physiological activity was apparently not affected by the number of cells extracted. This indicates that the increased extraction rate of indigenous soil bacteria obtained by effective disruption of aggregates and detachment of cells from surfaces, only results in increased extraction of cells that have been physiologically changed as a result of the extraction process. © 1996 Federation of European Microbiological Societies. Published by Elsevier Science B.V. Soil dispersion nationallicence Bacterial extraction nationallicence Microbial activity nationallicence Lindahl Viggo Department of Biotechnological Sciences, Agricultural University of Norway, P.O. Box 5040, N-1432 Ås, Norway aut Aa Kari Department of Biotechnological Sciences, Agricultural University of Norway, P.O. Box 5040, N-1432 Ås, Norway aut Olsen Rolf A. Department of Biotechnological Sciences, Agricultural University of Norway, P.O. Box 5040, N-1432 Ås, Norway aut FEMS Microbiology Ecology Blackwell Publishing Ltd 21/3(1996-11), 221-230 21:3<221 1996 21 femsec https://doi.org/10.1111/j.1574-6941.1996.tb00349.x text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1111/j.1574-6941.1996.tb00349.x text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Lindahl Viggo Department of Biotechnological Sciences, Agricultural University of Norway, P.O. Box 5040, N-1432 Ås, Norway aut NATIONALLICENCE 700 1- Aa Kari Department of Biotechnological Sciences, Agricultural University of Norway, P.O. Box 5040, N-1432 Ås, Norway aut NATIONALLICENCE 700 1- Olsen Rolf A. Department of Biotechnological Sciences, Agricultural University of Norway, P.O. Box 5040, N-1432 Ås, Norway aut NATIONALLICENCE 773 0- FEMS Microbiology Ecology Blackwell Publishing Ltd 21/3(1996-11), 221-230 21:3<221 1996 21 femsec Metadata rights reserved CC BY-NC-4.0 http://creativecommons.org/licenses/by-nc/4.0 nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-oxford