MU Lab (1)


Dey R., Ortiz Tena, F., Wang, S., Messmann, J.M., Steinweg, C., Thomsen, C.,  Posten, C., Leu, S., Ullrich, M.S., and  L. Thomsen. 2023. Exploring advanced phycoremediation strategies for resource recovery from secondary wastewater using a large scale photobioreactor. Bioresource Technology 391, 129986

Raina, J.B. , Giardina, M., Douglas, Brumley, R., Clode, P.L., Pernice, M., Guagliardo, P., Bougoure, J., Mendis, H., Smriga, S., Sonnenschein, E.C., Ullrich, M.S., Stocker, R., and J.R. Seymour.  Chemotaxis increases metabolic exchanges between marine picophytoplankton and heterotrophic bacteria. nature microbiology. doi: 10.1038/s41564-023-01327-9 (2023).

Ninkuu, V., Yan, J., Fu, Z., Yang, T., Ziemah, J., Ullrich, M.S., Kuhnert, N., and H. Zeng. Lignin and Its Pathway-Associated Phytoalexins Modulate Plant Defense against Fungi.    Journal of Fungi, (1):52. doi: 10.3390/jof9010052 (2023).


Moreno-Zambrano M, Ullrich, MS, Hütt M-T. 2022 Exploring cocoa bean fermentation mechanisms by kinetic modelling. R. Soc. Open Sci. 9: 210274. (2022)

Kumar S., R.N. D’Souza, M. Corno, M.S. Ullrich, N. Kuhnert, and M.-T. Hütt. Cocoa Bean Fingerprinting via Correlation Networks, npj Science of Food 6:5 (2022).


Yu SS, and M.S. Ullrich. Characterization of Salt Tolerant Phosphate and Zinc Solubilizing Bacillus Isolates for Plant Protection and Plant Stimulation use in Sustainable Agriculture in Myanmar, Int J Plant Biol Res 9(1):1126 (2021).

Kuhnert N., and M.S. Ullrich. Editorial special edition Cocotea 2019. Fifth international conference on coffee, cocoa and tea. Food Research International 143: 110243 (2021).

Thorstenson C.A., and M.S. Ullrich. Ecological Fitness of Vibrio cholerae, Vibrio parahemolyticus, and Vibrio vulnificus in a small-scale population dynamics study. Frontiers in Marine Science 8: 623988 (2021).

Kumar S., R.N. D’Souza, B. Behrends, M. Corno, M.S. Ullrich, N. Kuhnert, and M.T. Hütt. Cocoa origin classifiability through LC-MS data: A statistical approach for large and long-term datasets. Food Research International 140: 109983 (2021).

Will V., A. Stahl, and M.S. Ullrich. Heavy metal resistance in Marinobacter adhaerens HP15 supports colonization of transparent exopolymer particles during its interaction with diatoms. Marine Ecology Progress Series 658: 47-57 (2021).

Said I.H., C. Hagedorn, D.D. Petrov, M.B. Retta, J.D. Truex, S. Haka, M.S. Ullrich, and N. Kuhnert. LC-MS based metabolomic approach for the efficient identification and relative quantification of bioavailable cocoa phenolics in human urine. Food Chemistry 364: 130198 (2021).


Thorstenson C.A., and M.S. Ullrich. Developing a universal and efficient method for the rapid selection of stable fluorescent protein-tagged pathogenic Vibrio species. Marine Science and Engineering 8: 804 (2020).

Kuhnert N., R.N. D’Souza, B. Behrends, M.S. Ullrich, and M. Witt. Investigating time dependent cocoa bean fermentation by ESI-FT-ICR mass spectrometry. Food Research International 133: 109209 (2020).

Ma T., P. Yang, I. Dammann, Z. Lin, A.S. Mougharbel, M.X. Li, F. Adascalitei, R. Mitea, C. Silvestru, C.A. Thorstenson, M.S. Ullrich, K. Cseh, A. Jakupec, B.K. Keppler, M. Donalisio, R. Cavalli, D. Lembo, and U. Kortz. Tetra-(p-toly)antimony(III)-containing heteropolytungstates, [(p-toly)SbIII)4(A-alpha-XW9O34)]n- (X = P, As, or Ge): Synthesis, Structure, and Study of Antibacterial and Antitumor Activity. Inorganic Chemistry 59: 2978–2987 (2020).

John W.A., N. Böttcher, B. Behrends, M. Corno, N. Kuhnert, and M.S. Ullrich. Experimentally modelling cocoa bean fermentation reveals key factors and their influences. Food Chemistry 302: 125335 (2020).


Warren A. John, Nina L. Böttcher, Britta Behrends, Roy N. D’Souza, Marcello Corno, Nikolai Kuhnert, and Matthias S. Ullrich (2019) Experimentally modelling cocoa bean fermentation reveals key factors and their influences. Food Chemistry 302: 125335. DOI: 10.1016/j.foodchem.2019.125335

Song Wang, Diana Sirbu, Laurenz Thomsen, Nikolai Kuhnert, Matthias S. Ullrich, and Claudia Thomsen (2019) Comparative lipidomic studies of Scenedesmus sp. (Chlorophyceae) and Cylindrotheca closterium (Bacillariophyceae) reveal their differences in lipid production under nitrogen starvation. Journal of Phycology, 24 May 2019, DOI 10.1111/jpy.12887

Benjamin Gillard, Damianos Chatzievangelou, Laurenz Thomsen, and Matthias S. Ullrich (2019) Heavy-metal-resistant microorganisms in deep-sea sediments disturbed by mining activity: An application toward the development of experimental in vitro systems. Frontiers in Marine Science 6: 462. DOI: 10.3389/fmars.2019.00462

Warren A. John, Nina L. Böttcher, Maximilian Aßkamp, Audrey Bergouhou, Neha Kumari, Ping-Wei Ho, Roy N. D’Souza, Elke Nevoigt, and Matthias S. Ullrich (2019) Forcing Fermentation: Profiling Proteins, Peptides, and Polyphenols in Lab-Scale Cocoa Bean Fermentation. Food Chemistry 278:786-794, DOI: 10.1016/j.foodchem.2018.11.108

Nikolai Kuhnert, Inamullah H. Said, Abhinandan Shrestha, Ahmed Rezk, Anne Grimbs, Jennifer Nolzen, Harwig Schepker, Klaudia Brix, Dirk Albach, and Matthias S. Ullrich (2019) Rhododendron natural products as sources of novel antibiotics. Rhododendrons International 3(2): 141-151.


San San Yu and Matthias S. Ullrich (2018) Interaction of nitrogen fixation and alginate synthesis of Azotobacter vinelandii isolated from Myanmar mangroves. International Jounral of Plant Biology & Research 6(2): 1088.

Mauricio Moreno-Zambrano, Sergio Grimbs, Matthias S. Ullrich, and Marc-Thorsten Hütt (2018) A mathematical model of cocoa bean fermentation. Royal Society Open Science, DOI: 10.1098/rsos.180964.

Ingrid Torres-Monroy and Matthias S. Ullrich (2018) Identification of bacterial genes expressed during diatom-bacteria interactions using an in vivo expression technology approach. Frontiers in Marine Science, DOI: 10.3389/fmars.2018.00200.

Diana Sirbu, Anne Grimbs, Marcello Corno, Matthias S. Ullrich, and Nikolai Kuhnert (2018) Variation of triacylglycerol profiles in unfermented and dried fermented cocoa beans of different origins. Food Research International 111: 361-370, DOI 10.1016/j.foodres.2018.05.025.

Neha Kumari, Anne Grimbs, Roy N. D’Souza, Sujit K. Verma, Marcello Cornoa, Nikolai Kuhnert, and Matthias S. Ullrich (2018) Origin and varietal based proteomic and peptidomic fingerprinting of Theobroma cacao in non-fermented and fermented cocoa beans. Food Research International 111: 137-147 DOI 10.1016/j.foodres.2018.05.010.

Song Wang, Sujit K. Verma, Inamullah H. Said, Laurenz Thomsen, Matthias S. Ullrich, and Nikolai Kuhnert (2018) Changes in fucoxanthin production and protein profiles in Cylindrotheca closterium in response to blue light-emitting diode light. Microbial Cell Factories 17: 110 DOI 10.1186/s12934-018-0957-0

Wassim W. Ayass, T Fodor, E Farkas, Z Lin, HM Qasim, S Bhattacharya, AS Mougharbel, Khaled Abdallah, Matthias S. Ullrich, S Zaib, J Iqbal, S Harangi,  G Szalontai, I Bányai, L Zékány, I Tóth, and Uli Kortz. (2018) Dithallium(III)-Containing 30-Tungsto-4-phosphate, [Tl2Na2(H2O)2(P2W15O56)2]16-: Synthesis, Structural Characterization, and Biological StudiesInorganic Chemistry. DOI 10.1021/acs.inorgchem.8b00878.

Roy N. D’Souza, Anne Grimbs, Sergio Grimbs, Britta Behrends, Marcello Corno, Matthias S. Ullrich, and Nikolai Kuhnert (2018) Degradation of cocoa proteins into oligopeptides during sponataneous fermentation of cocoa beans. Food Research International 109: 506-516, DOI 10.1016/j.foodres.2018.04.068.

Song Wang, Inamullah H. Said, Candice Thorstenson, Claudia Thomsen, Matthias S. Ullrich, Nikolai Kuhnert, and Laurenz Thomsen (2018) Pilot-scale production of antibacterial substances by the marine diatom Phaeodactylum tricornutum Bohlin. Algal Research 32: 113-120. DOI 10:1016/j.algal.2018.03.014.

Inamullah H. Said, Selin Gencer, Matthias S. Ullrich, and Nikolai Kuhnert (2018) Tea and coffee time with bacteria – Investigation of uptake of key coffee and tea phenolics by wild type Escherichia coli. Food Research International, DOI 10.1016/j.foodres.2018.03.023

Diana Sirbu, Marcello Corno, Matthias S. Ullrich, and Nikolai Kuhnert (2018) Characterization of triacylglycerols in unfermented cocoa beans by HPLC-ESI mass spectrometry. Food Chemistry 254: 232-240. DOI 10.1016/j.foodchem.2018.01.194.


Antje Stahl, Alexandra I. Lazar, Veronica Muchemu, Werner M. Nau, Matthias S. Ullrich, and Andreas Hennig (2017) A fluorescent, supramolecular chemosensor to follow steroid depletion in bacterial cultures. Anal Bioanal Chem. DOI 10.1007/s00216-017-0593-2.

Abhinandan Shretha, Ahmed Rezk, Inamullah H. Said, Victoria von Glasenapp Rachelle Smith, Matthias S. Ullrich, Hartwig Schepker, and Nikolai Kuhnert (2017). Comparison of the polyphenolic profile and antibacterial activity of the leaves, fruits and flowers of Rhododendron ambiguum and Rhododendron cinnabarinum. BMC Research Notes 10:297. DOI 10.1186/s13104-017-260-1.

Inamullah H. Said, Ahmed Rezk, Isfahin Hussain, Anne Grimbs, Abhinandan Shrestha, Hartwig Schepker, Klaudia Brix, Matthias S. Ullrich, and Nikolai Kuhnert  (2017). Metabolome Comparison of Bioactive and Inactive Rhododendron Extracts and Identification of an Antibacterial Cannabinoid(s) from Rhododendron collettianum. Phytochemical Analysis. DOI 10.1002/pca.269.

Roy N. D’Souza , Sergio Grimbs, Britta Behrends, Herwig Bernaert, Matthias S. Ullrich, and Nikolai Kuhnert (2017) Origin-based polyphenolic fingerprinting of Theobroma cacao in unfermented and fermented beans. Food Research International,

Anne Grimbs, Abhinandan Shretha, Ahmed Rezk, Sergio Grimbs, Inamullah H. Said, Hartwig Schepker, Marc-Thorsten Hütt, Dirk C. Albach, Klaudia Brix, Nikolai Kuhnert, and Matthias S. Ullrich (2017) Bioactivity in Rhododendron: A systemic analysis of antimicrobial and cytotoxic activities and their phylogenetic and phytochemical origins. Frontiers in Plant Science DOI: 10.3389/fpls.2017.00551.


Antje Stahl and Matthias S. Ullrich (2016) Proteomics analysis of the response of the marine bacterium Marinobacter adhaerens HP15 to the diatom Thalassiosira weissflogii. Aquatic Microbial Ecology DOI: 10.3354/ame01804.

Neha Kumari, Kouame J. Kofi, Sergio Grimbs, Roy D’Souza, Nikolai Kuhnert, Gino Vrancken, and Matthias S. Ullrich (2016) Biochemical fate of vicilin storage protein during fermentation and drying of cocoa beans. Food Research International DOI: 10.1016/j.foodres.2016.10.033.

Warren A. John, Neha Kumari, Nina L. Böttcher, Kouame J. Kofi, Sergio Grimbs, Gino Vrancken, Roy N. D’Souza, Nikolai Kuhnert, and Matthias S. Ullrich (2016) Aseptic artificial fermentation of cocoa beans can be fashioned to replicate the peptide profile of commercial cocoa bean fermentation. Food Research International DOI: 10.1016/j.foodres.2016.10.011.

Khaled Abdallah, Katharina Hartman, Daniel Pletzer, Daria Zhurina, and Matthias S. Ullrich (2016) The bacteriophage-derived transcriptional regulator, LscR, activates the expression of levansucrase genes in Pseudomonas syringae. Molecular Microbiology DOI: 10.1111/mmi.13536.

Wassim W. Ayass, Tamas Fodor, Zhengguo Lin, Rachelle M. Smith, Xiaolin Xing, Khaled Abdallah, Imre Toth, Laszlo Zekany, Magda Pascual-Borras, Antonio Rodriguez-Fortea, Joseph M. Poblet, LinyuanFan, Jie Cao, Bineta Keita, Matthias S. Ullrich, and Ulrich Kortz (2016) Synthesis, structure, and antibacterial activity of a Ti3+-containing polyoxometalate, [Ti2{B-ß-SiW8O30(OH)}2]12-. Inorganic Chemistry DOI 10.102/acs.inorgchem.6b01921.

Inamullah H. Said, Rohan Shah, Matthias S. Ullrich, and Nikolai Kuhnert (2016) Quantification of microbial uptake of quercetin and its derivatives using an UHPLC-ESI-qTOF mass spectrometry assay. Food and Function 2016 DOI: 10.1039/C6FO00652C.

Peng Yang, Zhengguo Lin, Bassem S. Bassil, Gabriela Alfaro-Espinoza, Matthias S. Ullrich, Ming-Xing Li, Cristian Silvestru, and Ulrich Kortz (2016) Tetra-Antimony(III)-bridged 18-Tungsto-2-arsenates(V), [(LSbIII)4 (A-alpha-AsW9O34)2]10- (L = Ph, OH): Turning bioactivity on and off by ligand substitution. Inorg. Chem. 2016, DOI: 10.1021/acs.inorgchem/6b00107.

Mohamed Gamaledin Elsadig Karar, Laura Quiet, Ahmed Rezk, Rakesh Jaiswal, Maren Rehders, Matthias. S. Ullrich, Klaudia Brix, and Nikolai Kuhnert (2016) Phenolic profile and in vivo assessment of cytotoxicity and antibacterial activity of Ziziphus spina-christi leaf extracts. Medicinal Chemistry 2016, Vol. 6:143-156. DOI: 10.4172/2161-0444.1000339.


Peng Yang, Zhengguo Lin, Gabriela Alfaro-Espinoza, Matthias S. Ullrich, Ciprian I. Rat, Cristian Silvestru, and Ulrich Kortz (2015) 19-Tungstodiarsenate(III) functionalized by organoantimony(III) groups: Tuning the structure-bioactivity relationship. Inorg. Chem. 2015, Dec. 14. DOI: 10.1021/acs.inorgchem/5b02189.

Ahmed Rezk, Alaa Al-Hashimi, Warren John, Hartwig Schepker, Matthias S. Ullrich, and Klaudia Brix (2015) Assessment of cytotoxicity exerted by leaf extracts from plants of the genus Rhododendron towards epidermal keratinocytes and intestine epithelial cells. BMC Complementary and Alternative Medicine 15: 364-382 DOI: 10.1186/s12906-015-0860-8.

Peng Yang, Bassem S. Bassil, Zhengguo Lin, Ali Haider, Gabriela Alfaro-Espinoza, Matthias S. Ullrich, Cristian Silvestru, and Ulrich Kortz (2015) Organoantimony(III)-containing tungstoarsenates(III): From controlled assembly to biological activity. Chemistry A European Journal 2015, 21, 1-8 DOI: 10.1002/chem.201502398

Antje Stahl, Daniel Pletzer, Amna Mehmood and Matthias S. Ullrich (2015) Marinobacter adhaerens HP15 harbors two CzcCBA efflux pumps involved in zinc detoxification. Antonie van Leeuwenhoek (2015) DOI: 10.1007/s10482-015-0520-5

Anna Lopf, Mesude Bicak, Renzo Kottmann, Julia Schnelzer, Ivaylo Kostadinov,… Matthias S. Ullrich, Gunnar Gerdts, Antje Wichels,… and Frank Oliver Glöckner (2015) The ocean sampling day consortium. GigaScience 4:27 (2015) DOI: 10.1186/s13742-015-0066-5

Gabriela Alfaro-Espinoza and Matthias S. Ullrich (2015). Bacterial N2-fixation in mangrove ecosystems: insights from a diazotroph-mangrove interaction. Front. Microbiol. 6:445. DOI: 10.3389/fmicb.2005.00445

Ahmed Rezk, Jennifer Nolzen, Hartwig Schepker, Dirk C Albach, Klaudia Brix and Matthias S Ullrich (2015). Phylogenetic spectrum and analysis of antibacterial activities of leaf extracts from plants of the genus Rhododendron.BMC Complementary and Alternative Medicine (2015). DOI 10.1186/s12906-015-0596-5

Amna Mehmood, Khaled Abdallah, Shaunak Khandekar, Daria Zhurina, Abhishek Srivastava, Nehaya Al-Karablieh, Gabriela Alfaro-Espinoza, Daniel Pletzer, Matthias S. Ullrich (2015). Expression of extra-cellular levansucrase in Pseudomonas syringae is controlled by the in planta fitness-promoting metabolic repressor HexR. BMC Microbiology.2015, 15:48. DOI: 10.1186/s12866-015-0349-0

Melinda Bartok, Rashmi Tandon, Gabriela Alfaro-Espinoza, Matthias S. Ullrich, Detlef Gabel (2015). Reduction of Cytotoxicity of Benzalkonium Chloride and Octenidine by Brilliant Blue G. EXCLI Journal 01/2015; 14:123-132.


Shalin Seebah, Caitlin Fairfield, Matthias S. Ullrich, Uta Passow (2014). Aggregation and Sedimentation of Thalassiosira weissflogii (diatom) in a Warmer and More Acidified Future Ocean. PLoS ONE 11/2014.

Gabriela Alfaro-Espinoza, Matthias S. Ullrich (2014). Marinobacterium mangrovicola sp. nov., a marine nitrogen-fixing bacterium isolated from mangrove roots of Rhizophora mangle. International Journal of Systematic and Evolutionary Microbiology 09/2014; · 2.80 Impact Factor

Shaunak K, Srivastava A, Pletzer D, Stahl A and Ullrich MS (2014). The conserved upstream region of lscB/C determines expression of different levansucrase genes in plant pathogen Pseudomonas syringae. BMC Microbiology 2014, 14:79 doi:10.1186/1471-2180-14-79

P Khodaygan, H Rahimian, M Shams-Bakhsh, M Ullrich, H Wiengart (2013). ANGULAR LEAF SPOT OF SLEEPY MALLOW INCITED BY A PATHOVAR, CLOSELY SIMILAR to Pseudomonas syringae pv. Syringae*. Iranian Journal of Plant Pathology. 01/2013; 49(1):1-5.

Rwehumbiza, RM, Vennapusa RR, Gavara PR, -Fernandez-Lahore HM, Al-Karablieh N, Ullrich MS (2014). Potential of fibrous adsorbents for the binding and characterization of Porphyridium purpureum bioactive polysaccharides.JOURNAL OF CHEMICAL TECHNOLOGY AND BIOTECHNOLOGY, Volume:89, Issue:1, Pages:65-72, DOI:10.1002/jctb.4120


Sonnenschein EC, Abebew Syit D, Grossart HP, Ullrich MS (2012). Chemotaxis of Marinobacter adhaerens and its impact on attachment to the diatom Thalassiosira weissflogii. Appl Environ Microbiology 78, 6900-6907.

Emami K, Askari V, Ullrich M, Mohinudeen K, Anil AC, et al. (2012) Characterization of Bacteria in Ballast Water Using MALDI-TOF Mass Spectrometry. PLoS ONE 7(6): e38515. doi:10.1371/journal.pone.0038515

Kaeppel , E., A. Gärdes, S. Seebah, H.P. Grossart, and M. Ullrich. (2012) Marinobacter adhaerens sp. nov., prominent in aggregate formation with the diatom Thalassiosira weissflogii. Int. J. Syst. Evol. Microbiol 62: 124-128.

Srivastava, A., Al-Karablieh N., Khandekar S., Sharim A., Weingart H., and Ullrich M. (2012). Genomic distribution of levansucrase-coding genes in Pseudomonas syringae. Genes, 3: 115-137. Doi: 10.3390/genes3010115.

Gärdes A., Ramaye Y., Grossart H-P., Passow U., and Ullrich M.S. (2012). Effects of Marinobacter adhaerens HP15 on polymer exudation by Thalassiosira weissflogii at different N:P ratios. Marine Ecology Progress Series 461, 1-14 (2012).

Barsukova-Stuckart M., Piedra-Garza L.F., Gautam B., Alfaro-Espinoza G., Izarova N.V., Banerjee A., Bassil B.S., Ullrich M..S, Breunig H.J., Silvestru C., Kortz U. (2012).Synthesis and Biological Activity of Organoantimony(III)-Containing Heteropolytungstates. Inorg Chem. 2012 Oct 24. [Epub ahead of print]; PMID: 23094716 [PubMed – as supplied by publisher]


Gärdes, A., Iversen M.H., Grossart H.P., Passow U., and Ullrich M.. Diatom-associated bacteria are required for aggregation of Thalassiosira weissflogii. ISME Journal, 5, 436-445 (2011).

Sonnenschein, E., Gärdes , A. Seebah S., Torres-Monroy I., Grossart H.P., and Ullrich M.. Development of a genetic system for Marinobacter adhaerens HP15 involved in marine aggregate formation by interacting with diatom cells. J. Microbiol Methods 87, 176-183 (2011).


Gärdes, A., Kaeppel, E., Shehzad, A., Seebah, S., Teeling, H., Yarza, P., Glöckner, F.O., Grossart, H.-P., and Ullrich, M.S. Complete genome sequence of Marinobacter adhaerens type strain (HP15), a diatom-interacting marine microorganism. Standards in Genomic Sciences. DOI: 10.4056/sigs.922139 (2010).

Wensing, A., Zimmermann, S. and Geider, K. Identification of the Corn Pathogen Pantoea stewartii by Mass Spectrometry of Whole-Cell Extracts and Its Detection with Novel PCR Primers. Appl. Environm. Microbiol., DOI: 10.1128/AEM.01032-10 (2010).

Braun, S., J. Hofmann, A. Wensing, H. Weingart, M. Ullrich, D. Spiteller, and B. Völksch. In vitro antibiosis by Pseudomonas syringae Pss22d, acting against the bacterial blight pathogen of soybean plants, does not influence in planta biocontrol. J. Phytopath., DOI: 10.1111/j.1439-0434.2009.01612 (2010).

Braun, S., J. Hofmann, A. Wensing, M. Ullrich, H. Weingart, B. Völksch, and D. Spiteller. Identification of the biosynthetic gene cluster of 3-methylarginine, a toxin produced by Pseudomonas syringae pv. syringae 22d/93. Appl. Environm. Microbiol., DOI: 10.1128/AEM.00666-09 (2010).

Khalilpour, P., K. Lampe, M. Wagener, B. Stigler, C. Heiss, M. Ullrich, E.Domann, R. Schnettler, and V. Alt.Ag/SiOxCy plasma polymer coating for antimicrobial protection of fracture fixation devices. J. Biomed. Mat. Res., in press (2010).

Wensing, A., S. Braun, P. Büttner, D. Expert, B. Völksch, M. Ullrich, and H.Weingart. Impact of siderophore production by Pseudomonas syringae pv.syringae 22d/93 on 6 epiphytic fitness and biocontrol activity against Pseudomonas syringae pv. glycinea 1a/96. Appl. Environm. Microbiol.,76:2704-2711 (2010).


Al-Karablieh, N., H. Weingart, and M. Ullrich. Genetic exchange of multidrug efflux pumps among two enterobacterial species with distinctive ecological niches. Int. J. Mol. Sci., 10:629-645 (2009).

Al-Karablieh, N., H. Weingart, and M. Ullrich. The outer membrane protein TolC is required for phytoalexin resistance and virulence of the fire blight pathogen Erwinia amylovora. Microbial Biotech., 2:465-475 (2009).

Braun, Y., A. Smirnova, H. Weingart, A. Schenk, and M. Ullrich. Coronatine gene expression in vitro and in planta, and protein accumulation during temperature downshift in Pseudomonas syringae. Sensors, 9:4272-4285 (2009).

Zhurina, D., A. Srivastava, and M. Ullrich. Bakterielle Levansucrasen – Eine zuckersuesse Versuchung. BioSpektrum 05.09:488-489 (2009).


Schenk, A., H. Weingart, and M. Ullrich. Extraction of high-quality bacterial RNA from infected leaf tissue for bacterial in planta gene expression analysis by multiplexed fluorescent Northern hybridization. Mol.Plant Pathol. 9:227-235 (2008).

Schenk, A., H. Weingart, and M. Ullrich. The alternative sigma factor AlgT, but not alginate synthesis, promotes in planta multiplication of Pseudomonas syringae pv. glycinea. Microbiol. 154:413-421 (2008).

Smirnova, A., Y. Braun, and M. Ullrich. Site-directed mutagenesis of the temperature-sensing histidine protein kinase CorS from Pseudomonas syringae. FEMS Microbiol. Lett. 283:231-238 (2008).

Stoitsova, S., Y. Braun, M. Ullrich, and H. Weingart. Characterization of the RND-type multidrug efflux pump MexAB-OprM from the plant pathogen Pseudomonas syringae, Appl. Environ. Microbiol., 74:3387-3393 (2008).

Braun, Y., A. Smirnova, A. Schenk, H. Weingart, C. Burau, G. Muskhelishvili, and M. Ullrich. Component and protein domain exchange analysis of a thermo-responsive two-component regulatory system of Pseudomonas syringae, Microbiol., 154:2700-2708 (2008).


Braun, Y., A. Smirnova, A. Schenk, H. Weingart, and M. Ullrich. A temperature-sensing histidine kinase – function, genetics, and membrane topology. Methods in Enzymology 423:222-249 (2007).


Laue, H., A. Schenk, H. Li, L. Lambertsen, T.R. Neu, S. Molin, and M. Ullrich. Contribution of alginate and levan production to biofilm formation by Pseudomonas syringae. Microbiology, 152:2909-2918 (2006).

Goyer, C, and M. Ullrich. Identification of low-temperature-regulated genes in the fire blight pathogen Erwinia amylovora. Can. J. Microbiology 52:468-475 (2006).

Schenk, A., M. Berger, L.M. Keith, C.L. Bender, G. Muskhelishvili, and M. Ullrich. The algT gene of Pseudomonas syringae pv. glycinea and new insights into the transcriptional organization of the algT-muc gene cluster. J. Bacteriol. 188:8013-8021 (2006).

Li, H., A. Schenk, A. Srivastava, D. Zhurina, and M. Ullrich. Thermo-responsive expression and differential secretion of the extracellular enzyme levansucrase in the plant pathogenic bacterium Pseudomonas syringae pv. glycinea. FEMS Microbiol. Lett. 265:178-185 (2006).

Landgraf, A., H. Weingart, G. Tsiamis, and J. Boch. Different versions of Pseudomonas syringae pv. tomato DC3000 exist due to the activity of an effector transposon. Mol. Plant Pathol. 7:355-364 (2006).


Sundin, G.W., C.T. Mayfield, T.S. Gunasekera, Y. Zhao, G.L. Foster, and M. Ullrich. Complete nucleotide sequence and analysis of pPSR1 (72,601bp),a pPT23A family plasmid from Pseudomonas syringae pv. syringae A2. Mol. Gen. Genom., 270:1434-1442 (2004).

Burse, A., H. Weingart, and M. Ullrich. The phytoalexine-inducible multidrug efflux pump, AcrAB, contributes to virulence in the fire blight pathogen Erwinia amylovora. Mol. Plant-Microbe Interact., 17:43-54 (2004).

Burse, A., H. Weingart, and M. Ullrich. NorM, an Erwinia amylovora multidrug efflux pump involved in in vitro competition with other epiphytic bacteria. Appl. Environm. Microbiol. 70:693-703 (2004).

Smirnova, A.V., and M. Ullrich. Topological and deletion analysis of CorS, a Pseudomonas syringae sensor kinase. Microbiology, 150:2715-2726 (2004).

Weingart, H., S. Stubner, A. Schenk, and M. Ullrich. Impact of temperature on in planta expression of genes involved in synthesis of the Pseudomonas syringae phytotoxin coronatine. Mol. Plant-Microbe Interact., 17:1095-1102 (2004).


Smirnova, A., L. Wang, B. Rohde, I. Budde, H. Weingart, and M. Ullrich. Control of temperature-responsive synthesis of the phytotoxin coronatine in Pseudomonas syringae by the two-component system CorRPS. J. Mol. Microbiol. Biotechnol. 4:191-196 (2002).


Li, H. and M. Ullrich. Characterization and mutational analysis of three allelic lsc genes encoding for the extracellular enzyme levansucrase in Pseudomonas syringae. J. Bacteriol. 183: 3282-3292 (2001).

Smirnova, A., Li, H., Weingart, H., Aufhammer, S., Burse, A., Finis, K., Schenk, A., and M. Ullrich. Thermoregulated expression of virulence factors in plant-associated bacteria. Arch. Microbiol. 176: 393-400 (2001).


Budde, I. and M. Ullrich. Interactions of Pseudomonas syringae pv. glycinea with host and non-host plants in relation to temperature. Mol. Plant-Microbe Interact. 13: 951-961 (2000).

Ullrich, M., Schergaut, M., Boch, J., and B. Ullrich. Temperature-responsive genetic loci in the plant pathogen Pseudomonas syringae pv. glycinea. Microbiology 146: 2457-2468 (2000).


Rohde, B., R. Schmid, and M. Ullrich. Thermoregulated expression and characterization of an NAD(P)H-dependent 2-cyclohexen-1-one reductase in the plant pathogenic bacterium Pseudomonas syringae pv. glycinea. J. Bacteriol. 181: 814-821 (1999).

Weingart, H., B. Voelksch, and M. Ullrich. Comparison of ethylene production by Pseudomonas syringae and Ralstonia solanacearum. Phytopathology 89: 360-365 (1999).

Wang, L., Bender, C., and M. Ullrich. The transcriptional activator CorR is involved in biosynthesis of the phytotoxin coronatine and binds to the cmaABT promoter region in a temperature-dependent manner. Mol. Gen. Genet. 262: 250-260 (1999).

Alarcon-Chaidez, F., A. Penaloza-Vazquez, C. Bender, and M. Ullrich. Characterization of plasmids encoding the phytotoxin coronatine in Pseudomonas syringae. Plasmid 42: 210-220 (1999).


Budde, I., B. Rohde, C.L. Bender, and M. Ullrich. Growth phase and temperature influence promoter activity, transcript abundance and protein stability during biosynthesis of the Pseudomonas syringae phytotoxin coronatine. J. Bacteriol. 180: 1360-1367 (1998).

Rangaswamy, V., R. Mitchell, M. Ullrich, and C. Bender. Analysis of genes involved in the synthesis of the polyketide phytotoxin coronatine. J. Bacteriol. 180: 3330-3338 (1998).

Rohde, B., B. Pohlack, and M. Ullrich. Occurrence of thermoregulation of genes involved in coronatine biosynthesis among various Pseudomonas syringae strains. J. Basic Microbiol. 38: 53-63 (1998).

Hettwer, U., F. Jaeckel, J. Boch, M. Meyer, K. Rudolph, and M. Ullrich. Cloning, nucleotide sequence and expression in Escherichia coli of levansucrase genes from the plant pathogens Pseudomonas syringae pv. glycinea and P. syringae pv. phaseolicola. Appl. Environm. Microbiol. 64: 3180-3187 (1998).

Bender, C.L., D.A. Palmer, A. Penaloza-Vazquez, V. Rangaswamy, and M. Ullrich. Biosynthesis and regulation of coronatine, a non-host-specific phytotoxin produced by Pseudomonas syringae. Subcell. Biochem. 29: 321-341 (1998).


Rangaswamy, V., M. Ullrich, W. Jones, R. Mitchell, R. Parry, P. Reynolds, and C. Bender. Expression and analysis of coronafacate ligase, a thermoregulated gene required for production of the phytotoxin coronatine in Pseudomonas syringae. FEMS Microbiol. Lett. 154: 65-72 (1997).


Penaloza-Vasquez, A., V. Rangaswamy, M. Ullrich, A.-M. Bailey, and C.L. Bender. Use of Translational Fusions to the Maltose-Binding Protein to Produce and Purify Proteins in Pseudomonas syringae and Assess Their Activity in Vivo. Mol. Plant Microbe Interactions 9: 637-641 (1996).

Bender, C.L., D. A. Palmer, A. Penaloza-Vazquez, V. Rangaswamy, M. Ullrich. Biosynthesis of coronatine, a thermoregulated phytotoxin produced by the phytopathogen Pseudomonas syringae. Archives of Microbiology 166: 71-75 (1996).

Sundin, G.W., S. Kidambi, M. Ullrich, and C.L. Bender. Resistance to ultraviolett light in Pseudomonas syringae: Sequence and functional analysis of the plasmid-encoded rulAB genes. Gene 177: 77-81 (1996).


Liyanage, H., D. Palmer, M. Ullrich, and C.L. Bender. Characterization and transcriptional analysis of the gene cluster for coronafacic acid, the polyketide component of the phytotoxin coronatine. Appl. Environm. Microbiol. 61: 3843-3848. (1995).

Ullrich, M., A. Penaloza-Vasquez, A. Bailey, and C.L. Bender. A modified two-component regulatory system is involved in temperature-dependent biosynthesis of the Pseudomonas syringae phytotoxin coronatine. J. Bacteriol. 177: 6160-6169 (1995).


Ullrich, M., A.C. Guenzi, R.E. Mitchell, and C.L. Bender. Cloning and expression of genes required for coronamic acid (2-ethyl-1-aminocyclopropane 1-carboxylic acid), an intermediate in the biosynthesis of the phytotoxin coronatine. Appl. Environm. Microbiol. 60: 2890-2897 (1994).

Bereswill, S., P. Bugert, B. Voelksch, M. Ullrich, C.L. Bender, and K. Geider. Identification and relatedness of coronatine-producing Pseudomonas syringae pathovars by PCR analysis and sequence determination of amplification products. Appl. Environm. Microbiol. 60: 2924-2930 (1994).

Ullrich, M., and C.L. Bender. The biosynthetic gene cluster for coronamic acid, an ethylcyclopropyl amino acid, contains genes homologous to amino acid-activating enzymes and thioesterases. J. Bacteriol. 176: 7574-7586 (1994).


Ullrich, M., S. Bereswill, B. Voelksch, W. Fritsche, and K. Geider. Molecular characterization of field isolates of Pseudomonas syringae pv. glycinea differing in coronatine production. J. Gen. Microbiol. 139: 1927-1937 (1993).

Voelksch, B., M. Ullrich, and W. Fritsche. Occurrence of antimicrobial activities of bacteria from soybean leaf spots. J. Bas. Microbiol. 33: 349-355 (1993).

Bender, C., H. Liyanage, D. Palmer, M. Ullrich, S. Young, and R. Mitchell. Characterization of the genes controlling biosynthesis of the polyketide phytotoxin coronatine including conjugation between coronafacic and coronamic acid. Gene 133: 31-38 (1993).


Voelksch, B., M. Ullrich, and W. Fritsche. Identification and population dynamics of bacteria in leaf spots of soybean. Microbial Ecology 24: 304-311 (1992).

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