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Michael Rothballer

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  1. Hartmann A., Klink S., and Rothballer M. 2021. Importance of N-Acyl-Homoserine Lactone-Based Quorum Sensing and Quorum Quenching in Pathogen Control and Plant Growth Promotion. Pathogens. 10: 1561. doi: 10.3390/pathogens10121561.

  2. Hartmann A., Klink S., and Rothballer M. 2021. Plant Growth Promotion and Induction of Systemic Tolerance to Drought and Salt Stress of Plants by Quorum Sensing Auto-Inducers of the N-acyl-homoserine Lactone Type: Recent Developments. Frontiers in Plant Sicence. 12: 683546. doi: 10.3389/fpls.2021.683546.

  3. Windisch S., Sommermann L., Babin D., Chowdhury S.P., Grosch R., Moradtalab N., Walker F., Hoglinger B., El-Hasan A., Armbruster W., Nesme J., Sorensen S.J., Schellenberg I., Geistlinger J., Smalla K., Rothballer M., Ludewig U., and Neumann G. 2021. Impact of Long-Term Organic and Mineral Fertilization on Rhizosphere Metabolites, Root–Microbial Interactions and Plant Health of Lettuce. Frontiers in Microbiology. 11: 597745. doi: 10.3389/fmicb.2020.597745.

  4. Kuhl T., Chowdhury S.P., Uhl J., and Rothballer M. 2021. Genome-Based Characterization of Plant-Associated Rhodococcus qingshengii RL1 Reveals Stress Tolerance and Plant–Microbe Interaction Traits. Frontiers in Microbiology. 12: 708605. doi: 10.3389/fmicb.2021.708605.

  5. Babin D., Sommermann L., Chowdhury S.P., Behr J.H., Sandmann M, Neumann G., Nesme J, Sorensen S.J., Schellenberg I., Rothballer M., Geistlinger J., Smalla K., and Grosch R. 2021. Distinct rhizomicrobiota assemblages and plant performance in lettuce grown in soils with different agricultural management histories. FEMS Microbiology Ecology. 97: fiab027. doi: 10.1093/femsec/fiab027.


  6. Ferreira NdS., Hayashi Sant’ Anna F., Massena Reis V., Ambrosini A., Gazolla Volpiano C., Rothballer M., Schwab S., Baura V.A., Balsanelli E., de Oliveira Pedrosa F., Pereira Passaglia L.C., Maltempi de Souza E., Hartmann A., Cassan F., and Edson Zilli, J. 2020. Genome-based reclassification of Azospirillum brasilense Sp245 as the type strain of Azospirillum baldaniorum sp. nov. International Journal of Systematic and Evolutionary Microbiology. doi: 10.1099/ijsem.0.004517.

  7. Zytynska S.E., Eicher M., Rothballer M., and Weisser W.W. 2020. Microbial- Mediated Plant Growth Promotion and Pest Suppression Varies Under Climate Change. Frontier Plant Science. 11:573578. doi: 10.3389/fpls.2020.573578.

  8. Anderson A.C., Rothballer M., Altenburger M.J., Woelber J.P., Karygianni L., Vach K., Hellwig E., Al-Ahmad A. 2020. Long-term fluctuation of oral biofilm microbiota following different dietary phases. Applied Environmental Microbiology. 86:e01421-20. doi: 10.1128/AEM .01421-20.


  9. Kuhl T, Felder M, Nussbaumer T, Fischer D, Kublik S, Paul Chowdhury S, Schloter M, and Rothballer M. 2019. De Novo Genome Assembly of a Plant-Associated Rhodococcus qingshengii Strain (RL1) Isolated from Eruca sativa Mill. and Showing Plant Growth-Promoting Properties. Microbiology Resource Announcemets. 8:e01106-19. doi: 10.1128/ MRA.01106-19.

  10. Rodriguez P.A., Rothballer M., Chowdhury S.P., Nussbaumer T., Gutjahr C., and Falter-Braun P. 2019. Systems Biology of Plant-Microbiome Interactions. Molecular Plant. 12: 804–821. doi: 10.1016/j.molp.2019.05.006.

  11. Hartmann A., Fischer D., Kinzel L., Chowdhury S.P., Hofmann A., Baldani J.I., Rothballer M. 2019. Assessment of the structural and functional diversities of plant microbiota: Achievements and challenges – A review. Journal of Advanced Research. doi: 10.1016/j.jare.2019.04.007.


  12. Anderson, A.C., Rothballer, M., Altenburger, M.C., Woelber, J.P., Karygianni, L., Lagkouvardos, I., Hellwig, E., and Al-Ahmad, A. 2018. In-vivo shift of the microbiota in oral biofilm in response to frequent sucrose consumption. Scientific Reports. 8:14202. doi: 10.1038/s41598-018-32544-6.

  13. Kljujeva, I., Raicevica, V., Vujovicb, B., Rothballer, M., and Schmid, M. 2018. Salmonella as an endophytic colonizer of plants - A risk for health safety vegetable production. Microbial Pathogenesis. 115: 199–207. doi: 10.1016/j.micpath.2017.12.020.

  14. Kljujeva, I., Raicevica, V., Jovicic-Petrovica, J., Vujovicb, B., Mirkovica, M., and Rothballer, M. 2018. Listeria monocytogenes – Danger for health safety vegetable production. Microbial Pathogenesis. 120: 23–31. doi: 10.1016/j.micpath.2018.04.034.


  15. Alessandrini, F., Vennemann, A., Gschwendtner, S., Neumann, A.U., Rothballer, M., Seher, T., Wimmer, M., Kublik, S., Traidl-Hoffmann, C., Schloter, M., Wiemann, M., and Schmidt-Weber, C.B. 2017. Pro-Inflammatory versus Immunomodulatory Effects of Silver Nanoparticles in the Lung: The Critical Role of Dose, Size and Surface Modification. Nanomaterials. 7: 300. doi: 10.3390/nano7100300.


  16. Han, S., Li, D., Trost, E., Mayer, K.F., Vlot, A.C., Heller, W., Schmid, M., Hartmann, A., and Rothballer, M. 2016. Systemic responses of barley to the 3-hydroxy-decanoyl-homoserine lactone producing plant beneficial endophyte Acidovorax radicis N35. Frontiers in Plant Science. 7(1868). doi: 10.3389/fpls.2016.01868.

  17. Obersteiner, A., Gilles, S., Frank, U., Beck, I., Haring, F., Ernst, D., Rothballer, M., Hartmann, A., Traidl-Hoffmann, C., Schmid, M. 2016. Pollen-associated microbiome correlates with pollution parameters and the allergenicity of Pollen. Plos One. 11(2):1 1-16. doi: 10.1371/journal.pone.0149545.

  18. Bensidhoum, L., Nabti, E., Tabli, N., Kupferschmied, P., Weiss, A., Rothballer, M., Schmid, M., Keel, C., Hartmann, A. 2016. Heavy metal tolerant Pseudomonas protegens isolates from agricultural well water in northeastern Algeria with plant growth promoting, insecticidal and antifungal activities. European Journal of Soil Biology. 75:38-46.

  19. Diesner S.C., Bergmayr C., Pfitzner B., Assmann V., Krishnamurthy D., Starkl P., Endesfelder D., Rothballer M., Welzl G., Rattei T., Eiwegger T., Szepfalusi Z., Fehrenbach H., Jensen-Jarolim E., Hartmann A., Pali-Scholl I., and, Untersmayr E. 2016. A distinct microbiota composition is associated with protection from food allergy in an oral mouse immunization model. Clinical Immunology. 173: 10-18. doi: 10.1016/j.clim.2016.10.009.


  20. Zeiller, M., Rothballer, M., Iwobi, A. N., Bohnel, H., Gessler, F., Hartmann, A., and Schmid1, M. 2015. Systemic colonization of clover (Trifolium repens) by Clostridium botulinum strain 2301. Frontiers in Microbiology. 6(1207): 1-14. doi: 10.3389/fmicb.2015.01207.

  21. Glaeser, S. P., Imani, J., Alabid, I., Guo, H., Kumar, N., Kampfer, P., Hardt, M., Blom, J., Goesmann, A., Rothballer, A., Hartmann, A., and Kogel, K-H. 2015. Non-pathogenic Rhizobium radiobacter F4 deploys plant beneficial activity independent of its host Piriformospora indica. International Society for Microbial Ecology. 1-14. doi: 10.1038/ismej.2015.163.

  22. Rothballer, M., Picot, M., Sieper, T., Arends, J. B. A., Schmid, M., Hartmann, A., Boon, N., Buismand, C. J. N., Barriere, F., Strik, D. P. B. T. B. 2015. Monophyletic group of unclassified g-Proteobacteria dominates inmixed culture biofilm of high-performing oxygen reducing biocathode. Bioelectrochemistry. 106: 167-176. doi: 10.1016/j.bioelechem.2015.04.004.


  23. Nabti E., Bensidhoum L., Tabli N., Dahel D., Weiss A., Rothballer M., Schmid M., and Hartmann A. 2014. Growth stimulation of barley and biocontrol effect on plant pathogenic fungi by a Cellulosimicrobium sp. strain isolated from salt-affected rhizosphere soil in northwestern Algeria. European Journal of Soil Biology. 61: 20-26.
  24. Walker, A., B. Pfitzner, S. Neschen, M. Kahle, M. Harir, M. Lucio, F. Moritz, D. Tziotis, M. Witting, M. Rothballer, M. Engel, M. Schmid, D. Endesfelder, M. Klingenspor, T. Rattei, W. z. Castell, M. H. de Angelis, A. Hartmann, and P. Schmitt-Kopplin. 2014. Distinct signatures of host-microbial meta-metabolome and gut microbiome in two C57BL/6 strains under high-fat diet. International Society for Microbial Ecology. J:1-17. doi: 10.1038/ismej.2014.79.

  25. Hartmann A., Rothballer M., Hense B., and Schroeder P. 2014. Bacterial quorum sensing compounds are important modulators of microbe-plant interactions. Frontiers in Plant Science. 5: article 131. doi: 10.3389/fpls.2014.00131.

  26. Daniel H., Gholami A.M., Berry D., Desmarchelier C., Hahne H., Loh G., Mondot S., Lepage P., Rothballer M., Walker A., Bohm C., Wenning M., Wagner M., Blaut M., Schmitt-Kopplin P., Kuster B., Haller D., and Clavel T. 2014. High-fat diet alters gut microbiota physiology in mice. Multidisciplinary Journal of Microbial Ecology. 8(2): 295-308.


  27. Alqueres S., Meneses C., Rouws L., Rothballer M., Baldani I., Schmid M., and Hartmann A. 2013. The bacterial superoxide dismutase and gluthatione reductase are crucial for endophytic colonization of rice roots by Gluconacetobacter diazotrophicus strain PAL5. Molecular Plant-Microbe Interactions. 26: 937-945.

  28. Straub, D., Rothballer, M., Hartmann, A. and Ludewig, U. 2013. The genome of the endophytic bacterium H. frisingense GSF30T identifies diverse strategies in the Herbaspirillum genus to interact with plants. Evolutionary and Genomic Microbiology 4: 1-10.

  29. Wang F., Fekete A., Harir M., Chen X., Dörfler U., Rothballer M., Jiang X., Schmitt-Kopplin P., and Schroll R. 2013. Soil remediation with amicrobial community established on acarrier: Strong hints for microbial communication during 1,2,4-Trichlorobenzene degradation. Chemosphere . 92(11): 1403–1409.


  30. Trejo, A., de-Bashan, L. E., Hartmann, A., Hernandez, J.P., Rothballer, M., Schmid, M. and Bashan, Y. 2012. Recycling waste debris of immobilized microalgae and plant growth-promoting bacteria from wastewater treatment as a resource to improve fertility of eroded desert soil. Environmental and Experimental Botany. 75 : 65-73.

  31. Kaestli, M., Schmid, M., Mayo, M., Rothballer, M., Harrington, G., Richardson, L., Hill, A., Hill, J., Tuanyok, A., Keim, P., Hartmann, A., and Currie, B.J. 2012. Out of the ground: aerial and exotic habitats of the melioidosis bacterium Burkholderia pseudomallei in grasses in Australia. Environmental Microbiology 14: 2058-2070.

  32. Li, D., Rothballer, M., Engel, M., Hoser, J., Schimdt, T., Kuttler, C., Schmid, M., Schloter, M. and Hartmann, A. 2012. Phenotypic variation in Acidovorax radicis N35 influences plant growth promotion. FEMS Microbiology Ecology 79: 751-762.

  33. Timmers, R.A., Rothballer, M., Strik, D.P.B.T.B., Engel, M., Schulz, S., Schloter, M., Hartmann, A., Hamelers, B. and Buisman, C. 2012. Microbial community structure elucidates performance of Glyceria maxima plant microbial fuel cell. Applied Microbiology and Biotechnology 94: 537-548.

  34. Hochwind, K., Weinmaier, T., Schmid, M., van Hemert, S., Hartmann, A., Rattei, T., and Rothballer M. 2012. Draft Genome Sequence of Lactobacillus casei W56. Journal of Bacteriology 194: 6638.


  35. Li, D., Rothballer, M., Schmid, M., Esperschutz, J. and Hartmann, A. 2011. Acidovorax radicis sp. nov., a wheat-root-colonizing bacterium. Internatonal Journal of Systematic and Evolutionary Microbiology. 61: 2589-2594.

  36. de-Bashan, L.E., Schmid, M., Rothballer, M., Hartmann, A., and Bashan Y., 2011. Cell-cell interaction in the eukaryote-prokaryote model using the microalgae Chlorella vulgaris and the bacterium Azospirillum brasilense immobilized in polymer beads. Journal of Phycology 47:1350-1359.

  37. Picot, M., Lapinsonniere, L., Rothballer, M., and Barriere, F. 2011. Graphite anode surface modification with controlled reduction of specific aryl diazonium salts for improved microbial fuel cells power output. Biosensors and Bioelectronics. 28(1): 181-188.


  38. Nabti E., Sahnoune M., Ghoul M., Fischer D., Hofmann A., Rothballer M., Schmid M., and Hartmann A. 2010. Restoration of growth of durum wheat (Triticum durum var. waha) under saline conditions due to inoculation with the rhizosphere bacterium Azospirillum brasilense NH and extracts of the marine alga Ulva lactuca. Journal of Plant Growth Regulation. 29: 6-22.

  39. Fekete A., Kuttler C., Rothballer M., Hense B.A., Fischer D., Buddrus-Schiemann K., Lucio M., Muller J., Schmitt-Kopplin P., and Hartmann A. 2010. Dynamic regulation of N-acyl-homoserine lactone production and degradation in Pseudomonas putida IsoF. FEMS microbiology ecology. 72: 22-34.

  40. Chen X., Buddrus-Schiemann K., Rothballer M., Kramer P., and Hartmann A. 2010. Detection of quorum sensing molecules in Burkholderia cepacia culture supernatants with enzyme-linked immunosorbent assays. Analytical and Bioanalytical Chemistry. 398: 2669-2676.

  41. Barbarossa M.V., Kuttler C., Fekete A., and Rothballer M. 2010. A delay model for quorum sensing of Pseudomonas putida. BioSystems. 102: 148-156.


  42. Malik A.K., Fekete A., Gebefuegi I., Rothballer M., and Schmitt-Kopplin P. 2009. Single drop microextraction of homoserine lactone based quorum sensing signal molecules and their enantiomers separation using gas chromatography-mass spectrometry in the presence of biological matrices. Microchimica Acta 166: 101-107.


  43. Rothballer M., Eckert B., Schmid M., Fekete A., Schloter M., and Hartmann A. 2008 Endophytic root colonization of gramineous plants by Herbaspirillum frisingense. FEMS Microbiology Ecology 66: 85-95.

  44. Sharma M., Schmid M., Rothballer M., Hause G., Zuccaro A., Imani J., Kampfer P., Sch?fer P., Hartmann A., and Kogel K.-H. 2008. Detection and identification of bacteria intimately associated with representatives of the order Sebacinales. Cellular Microbiology. 10: 2235?2246.

  45. Hartmann, A., Rothballer, M. and Schmid, M. 2008. Lorenz Hiltner, a pioneer in rhizosphere microbial ecology and soil bacteriology research. Plant and Soil. 312: 7-14.


  46. Fekete, A., Frommberger, M., Rothballer, M., Li, X., Englmann, M., Fekete, J., Hartmann, A., Eberl, L. and Schmitt-Kopplin, P. 2007. Identification of bacterial N-acylhomoserine lactones (AHLs) with a combination of ultra-performance liquid chromatography (UPLC), ultra-high resolution mass spectrometry, and in-situ biosensors. Analytical and Bioanalytical Chemistry 387: 455-467.

  47. Hense, B.A., Kuttler, C., Muller, J., Rothballer, M., Hartmann, A. and Kreft, J.-U. 2007. Does efficiency sensing unify diffusion and quorum sensing? Nature Reviews Microbiology 5: 230-239.


  48. Rothballer, M., Schmid, M., Klein, I., Gattinger, A., Grundmann, S. and Hartmann A. 2006. Herbaspirillum hiltneri sp. nov., isolated from surface-sterilized wheat roots. International Journal of Systematic and Evolutionary Microbiology 56: 1341-1348.

  49. Muller, J., Kuttler, C., Hense, B.A., Rothballer, M. and Hartmann, A. 2006. Cell-cell communcation by quorum sensing and dimension-reduction. Journal of Mathematical Biology 53: 672-702.

  50. Li, X., Fekete, A., Englmann, M., G?tz, C., Rothballer, M., Buddrus, K., Cai, C., Schr?der, P., Hartmann, A., Chen, G. and Schmitt-Kopplin, P. 2006. Development and application of a method for the analysis of N-acylhomoserine lactones by solid-phase extraction and ultra high pressure liquid chromatography Journal of Chromatography. 1134: 186-193.


  51. Herschkovitz, Y., Lerner, A., Davidov, Y., Rothballer, M., Hartmann, A., Okon, Y. and Jurkevitch, E. 2005. Inoculation with the plant growth promoting rhizobacterium Azospirillum brasilense causes little disturbance in the rhizosphere and rhizoplane of maize (Zea mays). Microbial Ecology 50: 277-288.

  52. Rothballer, M., Schmid, M., Fekete, A. and Hartmann, A. 2005. Comparative in situ analysis of ipdC-gfpmut3 promotor fusions of Azospirillum brasilense strains Sp7 and Sp245. Environmental Microbiology 7: 1839-1846.


  53. Rothballer, M., Schmid, M. and Hartmann, A. 2003. In situ localization and PGPR-effect of Azospirillum brasilense strains colonizing roots of different wheat varieties. Symbiosis. 34: 261-279.


  54. Eberl L., Ammendola A., Rothballer M., Givskov M., Sternberg C., Kilstrup M., Schleifer K.-H., and Molin S. 2000. Inactivation of gltB abolishes expression of the assimilatory nitrate reductase gene (nasB) in Pseudomonas putida KT2442. Journal of Bacteriology 182: 3368–3376.

Chapters in books

Items in the following list that are not available for download may be available upon request from the author. Please contact them directly for any such inquiry.


  1. Schrey, S.D., Hartmann, A., and Hampp, R. 2015. Rhizosphere Interactions. In: Ecological Biochemistry: Environmental and Interspecies Interactions. 292-311.

  2. Hartmann, A., James, E.K., Frans, J., Schwab, S., Rothballer, M., and Schmid, M. 2015. In situ localization and strain-Specific quantification of Azospirillum and other diazotrophic plant growth-promoting rhizobacteria using antibodies and molecular probes. In: Handbook for Azospirillum. Chapter 3. Springer International Publishing. F.D. Cass?n et al. (eds.). pp. 45-64.

  3. Rouws, L.F.M., Fischer, D., Schmid, M., Reis, V.M., Baldani, J.I., and Hartmann, A. 2015. Culture-independent assessment of diazotrophic bacteria in sugarcane and isolation of Bradyrhizobium spp. from field-grown sugarcane plants using legume trap plants. In: Biological nitrogen fixation. Chapter 94. Vol. 2. John Wiley & Sons, Inc. Frans J. de Bruijn, Eds. 955-966.

  4. Wisniewski-Dy, F., Vial, L., Burdman, S., Okon, Y., and Hartmann, A. 2015. Phenotypic variation in Azospirillum spp and other root-associated bacteria. In: Biological nitrogen fixation/a>. Chapter 103. Vol. 2. John Wiley & Sons, Inc. Frans J. de Bruijn, Eds. 1047-1054.


  5. Varma, A., Fekete, A., Srivastava, A., Saxena, A.K., Frommberger, M., Li D., Gschwendter, S., Sherameti, I., Oelmueller, R., Schmitt-Kopplin P., Tripathi S., and Hartmann A. 2013. Chapter 12: Inhibitory Interactions of Rhizobacteria with the Symbiotic Fungus Piriformospora indica. In: Piriformospora indica, Soil Biology 33 (eds.: A. Varma). Berlin Heidelberg, Germany: Springer-Verlag, pp. 201-219

  6. Hartmann, A., Schenk, S.T., Riedel, T., Schroder P., and Schikora, A. 2013. The response of plants toward N-Acyl homoserine lactones of Quorum-Sensing-active bacteria in the rhizosphere. In: Molecular Microbial Ecology of the Rhizosphere, Volume 2, Ed. Frans J. de Bruijn. Wiley-Blackwell.

  7. Berg, G., Alavi M., Schmid, M. and Hartmann, A. 2013. The Rhizosphere as a Reservoir for Opportunistic Human Pathogenic Bacteria. In: Molecular Microbial Ecology of the Rhizosphere, Volume 2, First Edition. Edited by Frans J. de Bruijn. Wiley-Blackwell.

  8. Rothballer, M. und Hartmann, A. 2013. Von Archaeen und Eukaryoten - "Come together" der altesten Baumeister der Welt. In: BodenLeben - Erfahrungsweg ins Innere der Erde (Hrsg.: Beatrice Voigt), pp. 154-161.
  9. 2012

  10. Agerer, R., Hartmann, A., Pritsch, K., Raidl, S., Schloter, M., Verma, R. and Weigt, R. 2012. Plants and their ectomycorrhizosphere: cost and benefit of symbiotic soil organisms. In: Growth and Defense in Plants, Ecological Studies 220. Matyssek et al. Eds. Heidelberg, Germany: Springer Verlag, pp. 213-242.

  11. Hampp, R., Hartmann, A. and Nehls, U. 2012. The Rhizosphere: molecular interactions between microorganisms and roots. In: Growth and Defense in Plants, Ecological Studies 220 (eds. Matyssek et al.). Heidelberg, Germany: Springer Verlag, pp. 111-139.
  12. 2010

  13. Fekete A., Rothballer M., Hartmann A., and Schmitt-Kopplin P. 2010 Identification of bacterial autoinducers. In: Bacterial Signaling (eds.: R. Kr?mer, K. Jung). Weinheim, Germany: Wiley-VCH Verlag, pp. 95-111.
  14. 2009

  15. Rothballer M., Schmid M., and Hartmann A. 2009 Diazotrophic bacterial endophytes in Gramineae and other plants. In: Microbiology Monographs: Prokaryotic endosymbionts in plants. (ed. K. Pawlowski). Heidelberg, Germany: Springer Verlag, pp. 273-302.

  16. Hartmann A., and Schmid M. 2009 Fluorescence in situ hybridization (FISH) technique for the investigation of the structure and function of microbial communities. In: A Textbook of Molecular Biotechnology (eds. Chauhan, A.K., Varma, A.) New Delhi, India: I. K. International Publishing House, chapter 55, pp. 1207-1221.
  17. 2008

  18. Schmid M., Rothballer M., Hai B., Fekete A., Li X., Englmann M., Frommberger M., Schmitt-Kopplin P., and Hartmann A. 2008 Quorum Sensing in Root-Associated and Endopytic Diazotrophs. In: Biological Nitrogen Fixation: Towards Poverty Alleviation through Sustainable Agriculture (eds.: F.D. Dakora, S.B.M. Chimphango, A.J. Valentine, C. Elmerich, W.E. Newton). The Netherlands: Springer, pp. 313-315.

  19. Hense B.A., Kuttler C., M?ller J., Rothballer M., Hartmann A., and Kreft J.-U. 2008. Efficiency Sensing ? was messen Autoinduktoren wirklich? Biospektrum 01.08: 18-21.
  20. 2007

  21. Schmid M., and Hartmann A. 2007 Molecular phylogeny and ecology of root associated diazotrophic alpha- and beta-proteobacteria.In: Associative and Endophytic Nitrogen-fixing Bacteria and Cyanobacterial Associations. (eds.: C. Elmerich, W. E. Newton). New York, USA: Springer Verlag, chapter 2, pp. 21-40.

  22. Hartmann A., Smalla K., and S?rensen J. 2007 Microbial diversity in the rhizosphere: highly resolving molecular methodology to study plant-beneficial rhizosphere bacteria. In: Biodiversity in Agricultural Production Systems. (eds.: G. Benckiser, S. Schnell). Boca Raton, Florida, USA: CRC Press and Taylor&Francis Group, pp. 101-130.

  23. Schmid M., Rothballer M., and Hartmann A. 2007 Analysis of microbial communities in soil microhabitats using fluorescence in situhybridization. In: Modern Soil Microbiology. 2nd edition (eds.: J. D. van Elsas, J. K. Jansson, J. Trevors). Boca Raton, Florida, USA: CRC-Press, chapter 12, pp.317-335.

  24. Rothballer M., and Hartmann A. 2007 In situ detection of bacterial gene expression in the rhizosphere using gfp promoter fusions. In: COST 631 ? Handbook of Methods Used in Rhizosphere Research. (eds. J. Luster, R. Finlay), Swiss Federal Research Institute WSL, Birmensdorf, Switzerland, Chapter 4.1.: Microbial growth and visualization of bacteria and fungi, pp. 403-404.

  25. Van Elsas J.D., Torsvik V., Hartmann A., Ovreas L., and Jansson J. 2007 The bacteria and archeae in soil. In: Modern Soil Microbiolog, 2nd edition (eds. J. D. van Elsas, J. K. Jansson, J. Trevors). Boca Raton, Florida, USA: CRC-Press, chapter 12, pp. 317-335.

  26. Dazzo F.B., Schmid M., and Hartmann A. 2007 Immunofluorescence microscopy and fluorescence in situ hybridization combined withCMEIAS and other image analysis tools for soil- and plant-associated microbial autecology. In: Manual of Environmental Microbiology. 3rd edition (eds. C. J. Hurst, R. L. Crawford, J. L. Garland, D. A. Lipson, A.L. Mills, L. D. Stetzenbach) Washington DC, USA: ASM-Press, pp. 712-733.


  27. Baldani J.I., Krieg N.R., Baldani V.L.D., Hartmann A., and D?bereiner J. 2005 Genus II. Azospirillum. In: Bergey?s Manual of Systematic Bacteriology, 2nd edition, Vol. II (eds.: D. J. Brenner, N. R. Krieg, J. T. Staley). New York, USA: Springer Verlag, pp. 7-26.

  28. Moenne-Loccoz Y., Woo S.L., Okon Y., Bally R., Lorito M., Lemanceau P., and Hartmann A. 2005 Free-living plant-beneficial microorganisms and soil quality. In: Microbiological Methods for Assessing Soil Quality (eds.: J. Bloem, D. W. Hopkins, A. Benedetti). Wallingford, UK: CABI Publishing, chapter 9.5, p. 368.

  29. Schmid M., Baldani J.I., and Hartmann A. 2005. The genus Herbaspirillum. In: The Prokaryotes. Volume 5: Proteobacteria: Alpha and Beta Subclasses (eds. M. Dworkin, S. Falkow, E. Rosenberg, K.-H. Schleifer, E. Stackebrandt). New York, USA: Springer Verlag, pp. 141-150.

  30. Schmid M., Selesi D., Rothballer M., Schloter M., Lee N., Kandeler E., and Hartmann A. 2006. Localization and visualization of microbial community structure and activity in soil microhabitats. In: Soil Biology. Volume 6. Intestinal Microorganisms of Soil Invertebrates (eds.: H. K?nig, A. Varma). New York, USA: Springer Verlag, pp. 439-461.


  31. Hartmann A. 2004 Horizontaler Gentransfer: ein nat?rlicher Prozess. GSF-spezial "Gr?ne Gentechnik", S. 59-64.

  32. Hartmann A., Gantner S., Schuhegger R., Steidle A., D?rr C., Schmid M., Dazzo F.B., Eberl L., and Langebartels C. 2004 N-Acyl homoserine lactones of rhizosphere bacteria trigger systemic resistance in tomato plants. In: Biology of Plant-Microbe Interactions. Volume 4 (eds.: B. Lugtenberg, I. Tikhonovich, N. Provorov). Saint Paul, Minnesota, USA: APS Press, pp. 554-556.

  33. Hartmann A., Pukall R., Rothballer M., Gantner S., Metz S., Schloter M., and Mogge B. 2004 Microbial community analysis in the rhizosphere by in situ and ex situ application of molecular probing, biomarker and cultivation techniques. In: Plant Surface Microbiology (eds.: A. Varma, L. Abott, D. Werner, R. Hampp). Berlin, Germany: Springer Verlag, pp. 449-469.

  34. Schmid M., Rothballer M., A?mus B., Hutzler P., Schloter M., and Hartmann A. 2004 Detection of microbes by confocal laser scanningmicroscopy. In: Molecular Microbial Ecology Manual 2nd edition (eds.: G. A. Kowalchuk, F. J. De Bruijn, I. M. Head, A. D. L.Akkermans, J. D. van Elsas). Dordrecht, The Netherlands: Kluwer Academic Publishers, chapter 4.03, pp. 875-910.


  35. Hartmann A., and Baldani J. I. 2003 The Genus Azospirillum. In: The Prokaryotes. Volume 5: Proteobacteria: Alpha and BetaSubclasses (eds. M. Dworkin, S. Falkow, E. Rosenberg, K.-H. Schleifer, E. Stackebrandt). New York, USA: Springer-Verlag, pp. 114-140.

  36. Shmid, M. and Hartmann, A. 2003. Molecular Phylogeny and ecology of root associated diazotrophic alfa- and beta proteobacteria. In: Associative and Endophytic Nitrogen-fixing Bacteria and Cyanobacterial Association. (Eds.) C. Elmerich and W. E. Newton. Kluwer Academic Publishers, Netherlands. Chapters 2. pp. 1-20.


  37. Hartmann A., and Schloter M. 2001 Wirkungen auf die Bodenmikroflora. In: Handbuch der Umweltverenderungen und ekotoxikologie, Band II: Terrestrische ?kosysteme. (Hrsg. R. Guderian). Berlin, Deutschland: Springer-Verlag, Kapitel II 2.2, S. 91-106.


  38. Eckert B., Kirchhof G., Stoffels M., Baldani J.I., Weber B.O., and Hartmann A. 2000 Neue diazotrophe Bakterien aus den Rohstoffpflanzen Miscanthus sinensis und Pennisetum purpureum. In: Rhizodeposition und Stoffverwertung (Hrsg. W. Merbach, L. Wittenmayer, J. Augustin). Stuttgart / Leipzig, Deuscthland: B.G. Teubner Verlag, S. 103-109.

  39. Hartmann A., Chatzinotas A., A?mus B., and Kirchhof G. 2000 Molecular microbial ecology studies of diazotrophs associated with non-legumes with special reference to endophytic diazotrophs. In: Microbial Interactions in Agriculture and Forestry, Volume II (eds.: N.S. Subba Rao, Y.R. Dommergues). Enfield, New Hampshire, USA: Science Publishers, pp. 1-14.

  40. Hartmann, A., Stoffels, M., Eckert, B., Kirchhof, G. and Schloter. M. 2000 Analysis of the presence and diversity of diazotrophic endophytes. In: Prokaryotic nitrogen fixation: A model system for the analysis of a biological process. (Ed.)E.W. Triplett. Horizon Scientific Press. UK. Chapter 41 pp. 727-736.

  41. Hausner M., Lawrence J.R., Wolfaardt G.M., Schloter M., Seiler K.-P., and Hartmann A. 2000 The use of immunological techniques and scanning confocal laser microscopy for the characterization of Agrobacterium tumefaciens and Pseudomonas fluorescens in atrazine-utilizing biofilms. In: Biofilms: Investigative Methods & Applications (eds.: H.-C. Fleming, U. Szewzyk, T. Griebe). Lancaster, Pennsylvania,USA: Technomic Publishing Co., pp. 143-153.

  42. M?ller E., A?mus B., Hartmann A., and Seiler K.-P. 2000 The in situ detection of a microbial biofilm community on Karst rock coupon ina groundwater habitat. In: Biofilms: Investigative Methods & Applications (eds.: H.-C. Fleming, U. Szewzyk, T. Griebe). Lancaster, Pennsylvania, USA: Technomic Publishing Co., pp. 225-230.


  43. Hartmann A., Schloter M., Bergm?ller C., M?lter K., Zelles L., and Munch J.C. 1999 Diversit?t der Mikroflora von B?den und Sedimenten als ?kotoxikologischer Belastungsparameter. In: ?kotoxikologie - ?kosystemare Ans?tze und Methoden. (Hrsg.: J. Oehlmann, B.Markert). Landsberg / Lech, Deutschland: Ecomed-Verlag, S. 200-207.


  44. Hartmann, A., Assmus, B., Kirchhof, G. and Schloter, M. 1997 Direct approaches for studying soil microbes. In: Modern soil microbiology. van Elsas JD, Trevors JT, Wellington EMH (eds) Dekker, New York, pp 279-309.

  45. Hartmann A., Lawrence J.R., A?mus B., and Schloter M. 1997 Detection of microbes by laser confocal microscopy. In: Molecular Microbial Ecology Manual (eds.: A. Akkermans, J.D. van Elsas, F.J. de Bruijns). Dordrecht, The Netherlands: Kluwer Academic Publishers, chapter 4.1.10., pp. 1-34.


  46. Hartmann A. 1996 Biotechnological aspects of diazotrophic bacteria associated with rice. In:. Biological Nitrogen Fixation associated with Rice Production (eds.: M. Rahman et al.). Dordrecht, The Netherlands: Kluwer Academic Publishers, pp. 211-223.

  47. Lebuhn M., and Hartmann A. 1996 Auxins, L-tryptophan and related indolic and phenolic catabolites. In: Methods in Soil Biology(eds.: F. Schinner, R. ?hlinger, E. Kandeler, R. Margesin). Berlin / Heidelberg, Germany: Springer Verlag, pp. 268-280.

  48. Schloter M., Bode W., and Hartmann A. 1996. Identification and quantification with monoclonal antibodies. In: Methods in Soil Biology (eds.: F. Schinner, R. ?hlinger, E. Kandeler, R. Margesin). Berlin / Heidelberg, Germany: Springer Verlag, pp. 41-46.


  49. Hartmann, A., Baldani, J.-I., Kirchhof, G., A?mus, B., Hutzler, P., Springer, N., Ludwing, W., Baldani, V.-L. and Dobereiner, J. 1995. Taxonomic and ecologic studies of diazotrophic rhizosphere bacteria using phylogenetic probes. In: Azospirillum and related microorganisms. NATO ASI Series, ( I. Fendrik et al. eds) Vol. 37 pp. 543-547, Springer-Verlag Berin Heidelberg.

  50. Albers B.P., Hartmann A., and Beese F. 1995 Anaerobic heat output. In: Methods in Applied Soil Microbiology and Biotechnology(eds.: K. Alef, P. Nannipieri). London, UK: Academic Press, pp. 304-306.

  51. Steinberg C.E.W., Br?ggemann R., Hartmann A., Heller W., Kirchner M., Lienert D., M?ller K., Pestlin G., Scheunert I., Seiler K.-P., Ernst D., Spieser O.H., and Klein J. 1995. ?kotoxikologische Testverfahren. In: Handbuch des Umweltschutzes - 79. Erg. Lfd. 6/95. Landsberg / Lech, Deutschland: Ecomed-Verlag, S. 1-102.


  52. Hartmann A. 1994. Molecular approaches for the investigation of the genetic composition in aquatic ecosystems. In: Acidification of Freshwater Ecosystems: Implication for the Future (eds.: C.E.W. Steinberg, R.F. Wright). Chichester, UK: John Wiley, pp. 247-257.

  53. Hartmann, A. and Zimmer, W. 1994 Physiology of Azospirillum. In: Azospirillum/plant associations. CRC, Boca Raton, Fla. Okon Y (ed). pp 15?39.


  54. Hartmann A. 1993 Okologie von Mikroorganismen. In: Handbuch zur ?kologie (Hrsg.: W. Kuttler). Berlin, Deutschland: Analytica Verlag, pp. 235-240.

  55. Schloter M., Bode W., and Hartmann A. 1993 Identifizierung und Quantifizierung von Bodenbakterien mit monoklonalen Antikorpern. In: Biologische Arbeitsmethoden (2. Auflage) (Hrsg.: F. Schinner, R. ?hlinger, E. Kandeler, R. Margesin). Berlin, Deutschland: Springer Verlag, S. 44-50.

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