Abstract
Microorganisms and plants are believed to significantly contribute to the annual changes in the global N-cycle, but their relative contributions in N2-fixation, denitrification and nitrification are poorly understood as yet. Molecular biological techniques have rarely been applied to identify the percentage of bacteria with such traits in the N-cycle in water or soil ecosystems (e. g. 1,2,3). Recently, this laboratory developed gene probes for all steps of denitrification (with the exception of NO-reduction), nitrification (amoA gene) and N2-fixation (4). To obtain such probes, published sequences of the genes were screened for conserved regions by computer analysis, and oligonucleotide primers were developed of such regions which allowed to amplify gene segments of 400–850 bp by PCR. The amplificates obtained were cloned and sequenced and verified by sequence comparison. The following probes were used:
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© 1997 Springer-Verlag Berlin Heidelberg
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Bothe, H., Kloos, K., Kaiser, K., Hüsgen, U., Sonnwald, S., Schmitz, B. (1997). DNA-probing as a tool to monitor the distribution of N2-fixing, denitrifying and nitrifying bacteria in soils. In: Legocki, A., Bothe, H., Pühler, A. (eds) Biological Fixation of Nitrogen for Ecology and Sustainable Agriculture. NATO ASI Series, vol 39. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-59112-9_39
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DOI: https://doi.org/10.1007/978-3-642-59112-9_39
Publisher Name: Springer, Berlin, Heidelberg
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