Otto Geiger

Ecological Genomics Researcher

Full Professor

Academic history

Otto Geiger studied biology at the University of Hohenheim in Stuttgart, Germany and after investigating quinoproteins and their prosthetic group pyrroloquinoline quinone at the Institute of Microbiology, he received his doctoral title “summa cum laude” from the same institution in 1987. As a Feodor-Lynen Fellow of the Alexander von Humboldt Foundation, he did postdoctoral work in the United States at Harvard Medical School with Eugene P. Kennedy on the biosynthesis and function of periplasmic glucans in Gram-negative bacteria. Subsequently, together with Ben Lugtenberg and Herman Spaink, he investigated the biosynthesis of lipo-chitin oligosaccharide signals that cause nodule formation on legume host plants at the Institute of Molecular Plant Sciences, Leiden University in the Netherlands. From 1993 to 1999 he was a Research Group Leader in the Department of Biotechnology at the Technical University of Berlin, where he habilitated for Biochemistry in 1997. Otto Geiger was an International Research Scholar (2002-2006) of the Howard Hughes Medical Institute. He currently holds the position of Professor (Investigador Titular C) at the Center for Genomic Sciences (formerly the Research Center for Nitrogen Fixation) at the National Autonomous University of Mexico (Cuernavaca) which he joined in 1999. Geiger’s group discovered the phosphatidylcholine synthase pathway, which constitutes a major route for phosphatidylcholine (lecithin) formation in bacteria as well as the biosynthesis pathway for ornithine-containing lipids, which are widespread bioactive lipids encountered in bacterial membranes. More recently, he discovered molecular mechanisms for lipid remodeling of bacterial membranes in response to different types of stress. Presently, he studies the molecular functions of phosphatidylcholine in bacteria as well as the biosynthesis, transport, and function of sphingolipids in bacteria. He functions as an Editor for the Journal BMC Microbiology and for the Handbook of Hydrocarbon and Lipid Microbiology.



Telephone: (777) 3131697


2021Geiger, O., Sohlenkamp, C., Vera-Cruz, D., Medeot, D.B., Martínez-Aguilar, L., Sahonero-Canavesi, D.X., Weidner, S., Pühler, A., López-Lara, I.M.. (2021). "ExoS/ChvI Two-Component Signal-Transduction System Activated in the Absence of Bacterial Phosphatidylcholine.". Frontiers In Plant Science. 12():-. [doi:10.3389/fpls.2021.678976]34367203
2021Olea-Ozuna, R.J., Poggio, S., EdBergström,, Quiroz-Rocha, E., García-Soriano, D.A., Sahonero-Canavesi, D.X., Padilla-Gómez, J., Martínez-Aguilar, L., López-Lara, I.M., Thomas-Oates, J., Geiger, O.. (2021). "Five structural genes required for ceramide synthesis in Caulobacter and for bacterial survival.". Environmental Microbiology. 23(1):143-159. [doi:10.1111/1462-2920.15280]33063925
2021Soto, Maria J., Lopez-Lara, Isabel M., Geiger, Otto, Romero-Puertas, Maria C., van Dillewijn, Pieter. (2021). "Rhizobial Volatiles: Potential New Players in the Complex Interkingdom Signaling With Legumes.". Frontiers In Plant Science. 12():-. [doi:10.3389/fpls.2021.698912]34239533
2020Pech-Canul, Á.d.L.C., Rivera-Hernández, G., Nogales, J., Geiger, O., Soto, M.J., López-Lara, I.M.. (2020). "Role of Sinorhizobium meliloti and Escherichia coli Long-Chain Acyl-CoA Synthetase FadD in Long-Term Survival". Microorganisms. 8(4):-. [doi:10.3390/microorganisms8040470]32225039
2018López-Lara, I.M., Nogales, J., Pech-Canul, Á., Calatrava-Morales, N., Bernabéu-Roda, L.M., Durán, P., Cuéllar, V., Olivares, J., Alvarez, L., Palenzuela-Bretones, D., Romero, M., Heeb, S., Cámara, M., Geiger, O., Soto, M.J.. (2018). "2-Tridecanone impacts surface-associated bacterial behaviours and hinders plant–bacteria interactions". Environmental Microbiology. 20(6):2049-2065. [doi:10.1111/1462-2920.14083]29488306
2018López Lara, Isabel María, Geiger, Otto. (2018). "Formation of fatty acids". Biogenesis of Fatty Acids, Lipids and Membranes. ():44-55. [doi:10.1007/978-3-319-50430-8_5]
2018Geiger, Otto, Sohlenkamp, Christian, López Lara, Isabel María. (2018). "Formation of bacterial glycerol-based membrane lipids: pathways, enzymes, reactions.". Biogenesis of Fatty Acids, Lipids and Membranes. ():87-107. [doi:10.1007/978-3-319-50430-8_8]
2018Geiger, Otto, Padilla Gómez, Jonathan, López Lara, Isabel María. (2018). "Bacterial sphingolipids and sulfonolipids.". Biogenesis of Fatty Acids, Lipids and Membranes. ():273-289. [doi:10.1007/978-3-319-50430-8_12]
2018Sahonero Canavesi, Diana Ximena, López Lara, Isabel María, Geiger, Otto. (2018). "Membrane lipid degradation and lipid cycles in microbes.". Aerobic Utilization of Hydrocarbons, Oils and Lipids. ():1-24. [doi:10.1007/978-3-319-39782-5_38-1]
2017López-Lara, I.M., Geiger, O.. (2017). "Bacterial lipid diversity". Biochimica Et Biophysica Acta-Molecular And Cell Biology Of Lipids. 1862(11):1287-1299. [doi:10.1016/j.bbalip.2016.10.007]27760387
2017Angel Vences-Guzman, Miguel, Goetting-Minesky, M. Paula, Guan, Ziqiang, Castillo-Ramirez, Santiago, America Cordoba-Castro, Luz, Lopez-Lara, Isabel M., Geiger, Otto, Sohlenkamp, Christian, Fenno, J. Christopher. (2017). "1,2-Diacylglycerol choline phosphotransferase catalyzes the final step in the unique Treponema denticola phosphatidylcholine biosynthesis pathway". Molecular Microbiology. 103(5):896-912. [doi:10.1111/mmi.13596]28009086
2016Sahonero-Canavesi, Diana X., Zavaleta-Pastor, Maritza, Martinez-Aguilar, Lourdes, Lopez-Lara, Isabel M., Geiger, Otto. (2016). "Defining substrate specificities for lipase and phospholipase candidates". JOVE-JOURNAL OF VISUALIZED EXPERIMENTS. 2016(117):-. [doi:10.3791/54613]27911408
2016Degli Esposti, M., Geiger, O., Martinez-Romero, E.. (2016). "Recent developments on bacterial evolution into eukaryotic cells". Evolutionary Biology: Convergent Evolution, Evolution Of Complex Traits, Concepts And Methods. ():187-202. [doi:10.1007/978-3-319-41324-2_12]
2015Escobedo-Hinojosa, W.I., Vences-Guzmán, M.Á., Schubotz, F., Sandoval-Calderón, M., Summons, R.E., López-Lara, I.M., Geiger, O., Sohlenkamp, C.. (2015). "OlsG (Sinac-1600) Is an ornithine lipid N-Methyltransferase from the planctomycete Singulisphaera acidiphila". JOURNAL OF BIOLOGICAL CHEMISTRY. 290(24):15102-15111. [doi:10.1074/jbc.M115.639575]25925947
2015Angel Vences-Guzman, Miguel, Guan, Ziqiang, Itzel Escobedo-Hinojosa, Wendy, Roberto Bermudez-Barrientos, Jose, Geiger, Otto, Sohlenkamp, Christian. (2015). "Discovery of a bifunctional acyltransferase responsible for ornithine lipid synthesis in Serratia Proteamaculans". Environmental Microbiology. 17(5):1487-1496. [doi:10.1111/1462-2920.12562]25040623
2015Sohlenkamp, Christian, Geiger, Otto, Solis Oviedo, Rosa Lidia. (2015). "ESTUDIANDO LA SÍNTESIS DE FOSFATIDILCOLINA EN BACTERIAS: DE LÍPIDOS DE MEMBRANA A PROTEÍNAS DE MEMBRANA". Proteínas: En la intersección entre las matemáticas, la física, la química y la biología. ():-.
2015Sahonero-Canavesi, D.X., Sohlenkamp, C., Sandoval-Calderón, M., Lamsa, A., Pogliano, K., López-Lara, I.M., Geiger, O.. (2015). "Fatty acid-releasing activities in Sinorhizobium meliloti include unusual diacylglycerol lipase". Environmental Microbiology. 17(9):3391-3406. [doi:10.1111/1462-2920.12814]25711932
2015Sohlenkamp, C., Geiger, O.. (2015). "Bacterial membrane lipids: Diversity in structures and pathways". Fems Microbiology Reviews. 40(1):133-159. [doi:10.1093/femsre/fuv008]25862689
2015Aguilar, C., Flores, N., Riveros-McKay, F., Sahonero-Canavesi, D., Carmona, S.B., Geiger, O., Escalante, A., Bolívar, F.. (2015). "Deletion of the 2-acyl-glycerophosphoethanolamine cycle improve glucose metabolism in Escherichia coli strains employed for overproduction of aromatic compounds". Microbial Cell Factories. 14(1):194-194. [doi:10.1186/s12934-015-0382-6]26627477
2013Geiger, O, Lopez-Lara, IM, Sohlenkamp, C. (2013). "Phosphatidylcholine biosynthesis and function in bacteria". Biochimica Et Biophysica Acta-Molecular And Cell Biology Of Lipids. 1831(3):503-513. [doi:10.1016/j.bbalip.2012.08.009]22922101
2013Vences Guzmán, Miguel Ángel, Guan, Z.Q., Bermúdez Barrientos, José Roberto, Geiger, Otto, Sohlenkamp, Christian. (2013). "Agrobacteria lacking ornithine lipids induce more rapid tumour formation". Environmental Microbiology. 15(3):895-906. [doi:10.1111/j.1462-2920.2012.02867.x]22958119
2012Vences Guzmán, Miguel Ángel, Geiger, Otto, Sohlenkamp, Christian. (2012). "Ornithine lipids and their structural modifications: From A to E and beyond". Fems Microbiology Letters. 335(1):1-10. [doi:10.1111/j.1574-6968.2012.02623.x]22724388
2012Solis Oviedo, Rosa Lidia, Martínez-Morales, F., Geiger, Otto, Sohlenkamp, Christian. (2012). "Functional and topological analysis of phosphatidylcholine synthase from Sinorhizobium meliloti". Biochimica Et Biophysica Acta-Molecular And Cell Biology Of Lipids. 1821(4):573-581. [doi:10.1016/j.bbalip.2012.01.016]22333179
2012Higareda, M.F., Geiger, O, Mendoza, L., Mendez-Sánchez, R.A.. (2012). "Evidence of codon usage in the nearest neighbor spacing distribution of bases in bacterial genomes". PHYSICA A-STATISTICAL MECHANICS AND ITS APPLICATIONS. 391(4):1255-1269. [doi:10.1016/j.physa.2011.10.035]
2011Vences Guzmán, Miguel Ángel, Guan, Z.Q., Ormeño Orrillo, Ernesto Aldo, González Silva, Napoleón, López Lara, Isabel María, Martínez Romero, María Esperanza, Geiger, Otto, Sohlenkamp, Christian. (2011). "Hydroxylated ornithine lipids increase stress tolerance in Rhizobium tropici CIAT899". Molecular Microbiology. 79(6):1496-1514. [doi:10.1111/j.1365-2958.2011.07535.x]21205018
2011Landeta Escamilla, Cristina, Dávalos Rodríguez, Araceli Elvira, Cevallos Gaos, Miguel Ángel Carlos, Geiger, Otto, Brom Klanner, Susana, Romero Camarena, David René. (2011). "Plasmids with a chromosome-like role in Rhizobia". Journal Of Bacteriology. 193(6):1317-1326. [doi:10.1128/JB.01184-10]21217003
2011González Silva, Napoleón, López Lara, Isabel María, Reyes-Lamothe, R., Taylor, A.M., Sumpton, D., Thomas-Oates, J., Geiger, Otto. (2011). "The dioxygenase-encoding olsD gene from Burkholderia cenocepacia causes the hydroxylation of the amide-linked fatty acyl moiety of ornithine-containing membrane lipids". Biochemistry. 50(29):6396-6408. [doi:10.1021/bi200706v]21707055
2011Pech Canul, Angel De La Cruz, Nogales, J., Miranda-Molina, A., Álvarez, L., Geiger, Otto, Soto, M.J., López Lara, Isabel María. (2011). "FadD is required for utilization of endogenous fatty acids released from membrane lipids". Journal Of Bacteriology. 193(22):6295-6304. [doi:10.1128/JB.05450-11]21926226
2010Ingram, Brian O., Sohlenkamp, Christian, Geiger, Otto, Raetz, Christian R. H.. (2010). "Altered lipid A structures and polymyxin hypersensitivity of Rhizobium etli mutants lacking the lpxE and LpxF phosphatases". Biochimica Et Biophysica Acta-Molecular And Cell Biology Of Lipids. 1801(5):593-604. [doi:10.1016/j.bbalip.2010.02.001]20153447
2010Davila-Martinez, Yadira, Laura Ramos-Vega, Ana, Contreras-Martinez, Sandra, Encarnacion, Sergio, Geiger, Otto, Lopez-Lara, Isabel M.. (2010). "SMc01553 is the sixth acyl carrier protein in Sinorhizobium meliloti 1021". MICROBIOLOGY-SGM. 156(1):230-239. [doi:10.1099/mic.0.033480-0]19797355
2010Zavaleta-Pastor, Maritza, Sohlenkamp, Christian, Gao, Jun-Lian, Guan, Ziqiang, Zaheer, Rahat, Finan, Turlough M., Raetz, Christian R. H., Lopez-Lara, Isabel M., Geiger, Otto. (2010). "Sinorhizobium meliloti phospholipase C required for lipid remodeling during phosphorus limitation". PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA. 107(1):302-307. [doi:10.1073/pnas.0912930107]20018679
2010Medeot, Daniela B., Sohlenkamp, Christian, Dardanelli, Marta S., Geiger, Otto, Garcia de Lema, Mirta, Lopez-Lara, Isabel M.. (2010). "Phosphatidylcholine levels of peanut-nodulating Bradyrhizobium sp. SEMIA 6144 affect cell size and motility". Fems Microbiology Letters. 303(2):123-131. [doi:10.1111/j.1574-6968.2009.01873.x]20030724
2010Geiger, Otto, Sohlenkamp, Christian, López Lara, Isabel María. (2010). "Formation of bacterial membrane lipids: pathways, enzymes, reactions". Handbook of Hydrocarbon and Lipid Microbiology Hydrocarbons, Oils, and Lipids: Diversity, Properties and Formation. ():396-405.
2010López Lara, Isabel María, Geiger, Otto. (2010). "Formation of fatty acids". Handbook of Hydrocarbon and Lipid Microbiology Hydrocarbons, Oils, and Lipids: Diversity, Properties and Formation. ():385-394.
2010Geiger, Otto. (2010). "Lipids and Legionella virulence". Handbook of Hydrocarbon and Lipid Microbiology Hydrocarbons, Oils, and Lipids: Diversity, Properties and Formation. ():3195-3202.
2010Geiger, Otto, Gonzalez-Silva, Napoleon, Lopez-Lara, Isabel M., Sohlenkamp, Christian. (2010). "Amino acid-containing membrane lipids in bacteria". Progress In Lipid Research. 49(1):46-60. [doi:10.1016/j.plipres.2009.08.002]19703488
2009Laura Ramos-Vega, Ana, Davila-Martinez, Yadira, Sohlenkamp, Christian, Contreras-Martinez, Sandra, Encarnacion, Sergio, Geiger, Otto, Lopez-Lara, Isabel M.. (2009). "SMb20651 is another acyl carrier protein from Sinorhizobium meliloti". MICROBIOLOGY-SGM. 155(1):257-267. [doi:10.1099/mic.0.022079-0]19118366
2009Sandoval-Calderon, Mario, Geiger, Otto, Guan, Ziqiang, Barona-Gomez, Francisco, Sohlenkamp, Christian. (2009). "A eukaryote-like cardiolipin synthase is present in Streptomyces coelicolor and in most actinobacteria". JOURNAL OF BIOLOGICAL CHEMISTRY. 284(26):17383-17390. [doi:10.1074/jbc.M109.006072]19439403
2008Angel Vences-Guzman, Miguel, Geiger, Otto, Sohlenkamp, Christian. (2008). "Sinorhizobium meliloti mutants deficient in phosphatidylserine decarboxylase accumulate phosphatidylserine and are strongly affected during symbiosis with Alfalfa". Journal Of Bacteriology. 190(20):6846-6856. [doi:10.1128/JB.00610-08]18708506
2008Sepulveda, E., Perez-Mendoza, D., Ramirez-Romero, M. A., Soto, M. J., Lopez-Lara, I. M., Geiger, O., Sanjuan, J., Brom, S., Romero, D.. (2008). "Modulation of conjugative activity of rhizobial symbiotic plasmids by repression and transcriptional interference". FEBS JOURNAL. 275(1):49-49.
2008Sepulveda, Edgardo, Perez-Mendoza, Daniel, Ramirez-Romero, Miguel A., Soto, Maria J., Lopez-Lara, Isabel M., Geiger, Otto, Sanjuan, Juan, Brom, Susana, Romero, David. (2008). "Transcriptional interference and repression modulate the conjugative ability of the symbiotic plasmid of Rhizobium etli". Journal Of Bacteriology. 190(12):4189-4197. [doi:10.1128/JB.00041-08]18424522
2008Conover, Gloria M., Martinez-Morales, Fernando, Heidtman, Matthew I., Luo, Zhao-Qing, Tang, May, Chen, Cui, Geiger, Otto, Isberg, Ralph R.. (2008). "Phosphatidylcholine synthesis is required for optimal function of Legionella pneumophila virulence determinants". CELLULAR MICROBIOLOGY. 10(2):514-528. [doi:10.1111/j.1462-5822.2007.01066.x]17979985
2008Hacker, Stephanie, Sohlenkamp, Christian, Aktas, Meriyem, Geiger, Otto, Narberhaus, Franz. (2008). "Multiple phospholipid N-methyltransferases with distinct substrate specificities are encoded in Bradyrhizobium japonicum". Journal Of Bacteriology. 190(2):571-580. [doi:10.1128/JB.01423-07]17993534
2008Geiger, O., Lopez-Lara, I. M., Sohlenkamp, C.. (2008). "ALTERED FORMATIONS OF SPECIAL EUBACTERIAL MEMBRANE LIPIDS AFFECT BACTERIAL INTERACTIONS WITH EUKARYOTIC HOSTS". Biological Nitrogen Fixation: Towards Poverty Alleviation Through Sustainable Agriculture. 42():245-246.
2007Medeot, D.B., Sohlenkamp, Christian, Geiger, Otto, García, M.B., López Lara, Isabel María. (2007). "Phosphatidycholine fuction in rhizobial strains nodulating peanut: genes and enzymatic activites". Biocell. 31():134-.
2007Sepulveda, Edgardo, Perez-Mendoza, Daniel, Munoz, Socorro, Ramirez-Romero, Miguel A., Soto, Maria Jose, Cervantes, Laura, Herrera-Cervera, Jose A., Lopez-Lara, Isabel Sabel, Geiger, Otto, Sanuan, Juan, Brom, Susana, Romero, David. (2007). "Regulation of conjugal transfer of the Rhizobium etli Sym plasmid.". Plasmid. 57(2):220-221.
2007Sohlenkamp, Christian, Galindo-Lagunas, Kanaan A., Guan, Ziqiang, Vinuesa, Pablo, Robinson, Sally, Thomas-Oates, Jane, Raetz, Christian R. H., Geiger, Otto. (2007). "The lipid lysyl-phosphatidylglycerol is present in membranes of Rhizobium tropici CIAT899 and confers increased resistance to polymyxin B under acidic growth conditions". Molecular Plant-Microbe Interactions. 20(11):1421-1430. [doi:10.1094/MPMI-20-11-1421]17977153
2006Reeve, Wayne G., Brau, Lambert, Castelli, Joanne, Garau, Giovanni, Sohlenkamp, Christian, Geiger, Otto, Dilworth, Michael J., Glenn, Andrew R., Howieson, John G., Tiwaril, Ravi P.. (2006). "The Sinorhizobium medicae WSM419 IpiA gene is transcriptionally activated by FsrR and required to enhance survival in lethal acid conditions". MICROBIOLOGY-SGM. 152(10):3049-3059. [doi:10.1099/mic.0.28764-0]17005985
2006Sánchez, F., Quinto, C., López Lara, Isabel María, Geiger, Otto. (2006). "Biology of Plant-Microbe Interactions". Proceedings of the 12th International Congress on Molecular Plant-Microbe Interactions. 5():1-717.
2006Geiger, Otto, Sohlenkamp, Christian, López Lara, Isabel María. (2006). "Function of rhizobial membrane lipids for the symbiosis with legumes". Proceedings of the 12th International Congress on Molecular Plant-Microbe Interactions. 5():132-137.
2006López Lara, Isabel María, Sohlenkamp, Christian, Geiger, Otto. (2006). "The post-genomic era - What comes next?". Revista Latinoamericana De Microbiologia. 48(1):44-45. 17357573
2005Rojas-Jimenez, K., Sohlenkamp, Christian, Geiger, Otto, Martínez Romero, María Esperanza, Werner, D., Vinuesa Fleischmann, Pablo. (2005). "A CIC chloride channel homolog and ornithine-containing membrane lipids of Rhizobium tropici CIAT899 are involved in symbiotic efficiency and acid tolerance". Molecular Plant-Microbe Interactions. 18(11):1175-1185. [doi:10.1094/MPMI-18-1175]16353552
2005Lopez-Lara, IM, Gao, JL, Soto, MJ, Solares-Perez, A, Weissenmayer, B, Sohlenkamp, C, Verroios, GP, Thomas-Oates, J, Geiger, O. (2005). "Phosphorus-free membrane lipids of Sinorhizobium meliloti are not required for the symbiosis with alfalfa but contribute to increased cell yields under phosphorus-limiting conditions of growth". Molecular Plant-Microbe Interactions. 18(9):973-982. [doi:10.1094/MPMI-18-0973]16167767
2004Sohlenkamp, C, de Rudder, KEE, Geiger, O. (2004). "Phosphatidylethanolamine Is Not Essential for Growth of Sinorhizobium meliloti on Complex Culture Media". Journal Of Bacteriology. 186(6):1667-1677. [doi:10.1128/JB.186.6.1667-1677.2004]14996797
2004Geiger, O, Sohlenkamp, C, Martinez-Morales, F, Gao, JL, Zavaleta-Pastor, M, Lopez-Lara, IM. (2004). "Regulation of membrane lipid biosynthesis in eubacteria". FASEB JOURNAL. 18(8, S):3-3.
2004Gao, JL, Weissenmayer, B, Taylor, AM, Thomas-Oates, J, Lopez-Lara, IM, Geiger, O. (2004). "Identification of a gene required for the formation of lyso-ornithine lipid, an intermediate in the biosynthesis of ornithine-containing lipids". Molecular Microbiology. 53(6):1757-1770. [doi:10.1111/j.1365-2958.2004.04240.x]15341653
2004Sepulveda, Edgardo, Perez-Mendoza, Daniel, Munoz, Socorro, Ramirez-Romero, Miguel A., Soto, Maria Jose, Cervantes, Laura, Herrera-Cervera, Jose A., Lopez-Lara, Isabel Sabel, Geiger, Otto, Sanuan, Juan, Brom, Susana, Romero, David. (2004). "Identification of functional mob regions in Rhizobium etli: Evidence for self-transmissibility of the symbiotic plasmid pRetCFN42d". Journal Of Bacteriology. 186(17):5753-5761. [doi:10.1128/JB.186.17.5753-5761.2004]15317780
2004Geiger, Otto, Martínez Morales, Fernando, Sohlenkamp, Christian, López Lara, Isabel María. (2004). "ROLE OF BACTERIAL PHOSPHATIDYLCHOLINE IN SYMBIOTIC AND PATHOGENIC INTERACTIONS". Biology of Molecular Plant-Microbe Interactions. ():423-426.
2003Martinez-Morales, F, Schobert, M, Lopez-Lara, IM, Geiger, O. (2003). "Pathways for phosphatidylcholine biosynthesis in bacteria". MICROBIOLOGY-SGM. 149(12):3461-3471. [doi:10.1099/mic.0.26522-0]14663079
2003Lopez-Lara, IM, Sohlenkamp, C, Geiger, O. (2003). "Membrane lipids in plant-associated bacteria: Their biosyntheses and possible functions". Molecular Plant-Microbe Interactions. 16(7):567-579. [doi:10.1094/MPMI.2003.16.7.567]12848422
2003Djordjevic, M.A., Chen, H.C., Natera, S., Van Noorden, G., Menzel, C., Taylor, S., Renard, C., Geiger, Otto, Weiller, G.F.. (2003). "A global analysis of protein expression profiles in Sinorhizobium meliloti: Discovery of new genes for nodule occupancy and stress adaptation". Molecular Plant-Microbe Interactions. 16(6):508-524. [doi:10.1094/MPMI.2003.16.6.508]12795377
2003Sohlenkamp, C, Lopez-Lara, IM, Geiger, O. (2003). "Biosynthesis of phosphatidylcholine in bacteria". Progress In Lipid Research. 42(2):115-162. [doi:10.1016/S0163-7827(02)00050-4]12547654
2002Weissenmayer, B, Gao, JL, Lopez-Lara, IM, Geiger, O. (2002). "Identification of a gene required for the biosynthesis of ornithine-derived lipids". Molecular Microbiology. 45(3):721-733. [doi:10.1046/j.1365-2958.2002.03043.x]12139618
2002Geiger, Otto, López Lara, Isabel María. (2002). "Rhizobial acyl carrier proteins and their roles in the formation of bacterial cell-surface components that are required for the development of nitrogen-fixing root nodules on legume hosts". Fems Microbiology Letters. 208(2):153-162. [doi:10.1016/S0378-1097(02)00478-0]11959430
2001Lopez-Lara, IM, Geiger, O. (2001). "The nodulation protein NodG shows the enzymatic activity of an 3-oxoacyl-acyl carrier protein reductase". Molecular Plant-Microbe Interactions. 14(3):349-357. [doi:10.1094/MPMI.2001.14.3.349]11277432
2001Minder, AC, de Rudder, KEE, Narberhaus, F, Fischer, HM, Hennecke, H, Geiger, O. (2001). "Phosphatidylcholine levels in Bradyrhizobium japonicum membranes are critical for an efficient symbiosis with the soybean host plant". Molecular Microbiology. 39(5):1186-1198. [doi:10.1046/j.1365-2958.2001.02325.x]11251836
2001Lopez-Lara, IM, Geiger, O. (2001). "Novel pathway for phosphatidylcholine biosynthesis in bacteria associated with eukaryotes". JOURNAL OF BIOTECHNOLOGY. 91(2-3):211-221. [doi:10.1016/S0168-1656(01)00331-5]11566392
2000de Rudder, KEE, Lopez-Lara, IM, Geiger, O. (2000). "Inactivation of the gene for phospholipid N-methyltransferase in Sinorhizobium meliloti: Phosphatidylcholine is required for normal growth". Molecular Microbiology. 37(4):763-772. [doi:10.1046/j.1365-2958.2000.02032.x]10972799
2000Sohlenkamp, C, de Rudder, KEE, Rohrs, V, Lopez-Lara, IM, Geiger, O. (2000). "Cloning and characterization of the gene for phosphatidylcholine synthase". JOURNAL OF BIOLOGICAL CHEMISTRY. 275(25):18919-18925. [doi:10.1074/jbc.M000844200]10858449
2000Weissenmayer, B, Geiger, O, Benning, C. (2000). "Disruption of a gene essential for sulfoquinovosyldiacylglycerol biosynthesis in Sinorhizobium meliloti has no detectable effect on root nodule symbiosis". Molecular Plant-Microbe Interactions. 13(6):666-672. [doi:10.1094/MPMI.2000.13.6.666]10830266
2000López-Lara, I.M., Geiger, O.. (2000). "Expression and purification of four different rhizobial acyl carrier proteins". MICROBIOLOGY-SGM. 146(4):839-849. [doi:10.1099/00221287-146-4-839]10784042
1999de Rudder, KEE, Sohlenkamp, C, Geiger, O. (1999). "Plant-exuded choline is used for rhizobial membrane lipid biosynthesis by phosphatidylcholine synthase". JOURNAL OF BIOLOGICAL CHEMISTRY. 274(28):20011-20016. [doi:10.1074/jbc.274.28.20011]10391951
1996Thomas-Oates, J.E., van den Berg, J.D.J., Bloemberg, G.V., van der Drift, K.M.G.M.,, Geiger, Otto, López Lara, Isabel María, Rademaker, G.J., Spaink, H.P.. (1996). "Structural determination and biosynthetic studies of the rhizobial Nod metabolites: the lipo-chitin oligosaccharides". Mass spectrometry in the Biological Sciences. ():385-401. [doi:10.1007/978-1-4612-0229-5]
1994Spaink, H.P., Bloemberg, G.V., Wijfjes, A.H.M., Ritsema, T., López Lara, Isabel María, Geiger, Otto, Harteveld, M., Kafetzopoulos, D., van Brussel, A.N.N., Kijne, J.W., Lugtenberg, B.J.J., van der Drift, K.M.G.M., Thomas-Oates, J.E., Potrykus, I., Sautter, C.. (1994). "The molecular basis of host specificity in the Rhizobium leguminosarum-plant interaction". Advances in Molecular Genetics of Plant-Microbe Interactions. Vol. 3 Proceedings of the 7th International Symposium on Molecular Plant-Microbe Interactions, Edinburgh, U.K., June 1994. 3():91-98. [doi:10.1007/978-94-011-0177-6]