Biological
nitrogen fixation and plant promoting effects in associations between
rhizophere bacteria and roots of grasses, legumes and vegetables.
Biological nitrogen fixation in the Rhizobium legume
symbiosis
and bacterial diseases of plants.
Improvement of nodulation, nitrogen fixation, water uptake and yield
of chickpea (Cicer arietinum) and fava beans (Vicia faba).
Funding: CRB Foundation 1996-2000
Extracellular factors involved in the aggregation of the N2-fixing
rhizobacterium Azospirillum brasilense. Funding: ISF.
1998-2001
The regulation of the synthesis and degradation of the reserve
material poly-β-hydroxybutyrate
in Azospirillum brasilense. Funding: EU - 5th Framework.
2001-2003.
Molecular microbial ecology of populations in the rhizosphere: A
study of cereals inoculated with Azosprillum brasilense.
Funding: GIF; EU - 5th Framework. 2001-2003
Bahat-Samet E., Castro-Sowinski, S and Okon, Y. 2004.Arabinose content of extracellular
polysaccharide plays a role in cell aggregation of Azospirillum brasilense. FEMS Microbiology
Letters 237:195-203.
Kadouri, D., Castro-Sowinski, S., Jurkevitch, E. and Okon, Y. 2005. Ecological and
agricultural significance of bacterialpolyhydroxyalkanoates. Critical Reviews in Microbiology
31:55-67.
Okon, Y. 2005. PGPR-technology cases of application and futureprospects. In Rhizosphere
2004-Perspectives and Challenges. A Tribute to Lorenz Hiltner. Hartmann, A., Schmid, M.,
Wenzel, W. and Hisinger, Ph. (eds.). GSF, Neuherberg pp 273-274.
Dobbelaere, S. and Okon, Y. 2005. The plant growth promoting effects and plant responses. In
Nitrogen Fixation: Origins, Applications and Research Progress. Newton W. (Ed), Vol V:
Associative and Endophytic Nitrogen-Fixing Bacteria and Cyanobacterial Associations. C.
Elmerich and W. E. Newton. (eds) Springer, Heidelberg in press.
Moenne-Loccoz, Y., Woo, S.L., Okon, Y., Bally R., Lorito, L., Lemanceau, P. and Hartmann, A.
2005. Chapter 5. Free-living plant-beneficial microorganisms and soil quality in
Microbiological Methods for Assessing Soil Quality- Plant-Microbes Interactions and Soil
Quality, Bloem S., Hopkins, D.W. and Bennedeti A. (eds). CABI Publishing p. 368.
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.
Herschkovitz, Y., Lerner, A., Davidov, Y., Okon, Y. and Jurkevitch, E. 2005. Azospirillum
brasilense does not affect population structure of specific rhizobacterial communities of
inoculated maize (Zea mays). Environmental Microbiology. 7:1847-1852.
Lerner, A., Herschkovitz, Y., Baudoin, E., Nazaret, S., Moenne-Loccoz, Y., Okon, Y., and
Jurkevitch, E. 2006. Effect of Azospirillum brasilense on rhizobacterial communities analyzed
by denaturing gradient gel electrophoresis and automated intergenic spacer analysis. Soil
Biology and Biochemistry on line.
Lerner, A., Shor, Y., Vinokurov, A., Okon, Y. and Jurkevitch, E. 2006. Can denaturing
gradient gel electrophoresis (DGGE) analysis of amplified 16S rDNA of soil bacterial
populations be used in forensic investigations? Soil Biology and Biochemistry on line
Kramer-Haimovich, H., Servi, E., Katan, T., Rollins, J., Okon, Y. and Prusky, D. 2006.
Effect of ammonia production by C. gloeosporioides on pelB activation, pectate lyase
secretion and fruit pathogenicity. Applied and Environmental Microbiology. In press
- Lerner, A., Herschkovitz, Y., Baudoin, E., Nazaret, S., Moenne-Loccoz, Y.,
Okon, Y., and Jurkevitch, E. 2006. Effect of Azospirillum brasilense
on rhizobacterial communities analyzed by denaturing gradient gel electrophoresis and
automated intergenic spacer analysis. Soil Biology and Biochemistry 38:1212-1218.
- Lerner, A., Shor, Y., Vinokurov, A., Okon, Y. and Jurkevitch,
E. 2006. Can denaturing gradient gel electrophoresis (DGGE) analysis of amplified 16S rDNA
of soil bacterial populations be used in forensic investigations? Soil Biology and
Biochemistry 38:1188-1192.
- Kramer-Haimovich, H., Servi, E., Katan, T., Rollins, J.,
Okon, Y. and Prusky, D. 2006. Effect of ammonia production by C.
gloeosporioides on pelB activation, pectate lyase secretion and fruit
pathogenicity. Applied and Environmental Microbiology. 72:1034-1039.
- Valverde, A., Okon, Y. and Burdman S. 2006. cDNA-AFLP reveal
differentially expressed genes related to cell aggregation in Azospirillum
brasilense. FEMS Microbiology Letters 265:186-194.
- Dobbelaere, S. and Okon, Y. 2007. The plant growth promoting effects
and plant responses. In Nitrogen Fixation: Origins, Applications and Research Progress.
Newton W. (Ed), Vol V: Associative and Endophytic Nitrogen-Fixing Bacteria and
Cyanobacterial Associations. C. Elmerich and W. E. Newton. (eds) Springer, Heidelberg pp
145-170.
- Castro-Sowinski S., Matan, O., Bonafede, P. and Okon, Y. 2007.
A thioredoxin of Sinorhizobiummeliloti CE52G is required for melanin
production and symbiotic nitrogen fixation. Molecular Plant-Microbial Interactions
20:986-993.
- Castro-Sowinski S., Herschkovitz, Y., Okon, Y. and Jurkevitch,
E. 2007. Effects of inoculation with plant growth-promoting rhizobacteria on resident
rhizosphere microorganisms. FEMS Microbiology Letters 276:1-11.
- Dardanelli, M.S., Rodrguez Navarro, D.N., Megas, M., Okon, Y., 2008.
Influencia de la coinoculacin Azospirillum-rizobiossobre el crecimiento y la
fijacin de nitrgeno de leguminosas de inters agronmico. In: Cassn, F.,Garca Salamone,
I. (Eds.), Azospirillum sp: Cell physiology, Plant Response, Agronomic and
Environmental Research in Argentina,Asociacin Argentina de Microbiologa, pp. 143-153.
- Dardanelli, M. S., Fernandez de Cordoba, F. J., Espuny, M. R., Rodriguez
Carvajal M. A., Soria Diaz M. E, Gil Serrano, A., Okon, Y. and Megias, M. 2008.
Effect of Azospirillum brasilense coinoculated with Rhizobiumon
Phaseolus vulgaris flavonoids and Nod factor production under salt stress.
Soil Biology and Biochemistry 40:2713-2721.
- Valverde, A., Castro-Sowinski, S., Lerner, A., Fibach, S., Matan, O.,
Burdman, S. and Okon, Y. 2008. Exopolysaccharide production and cell
aggregation in Azospirillum brasilense. In F. D. Dakora et al., (eds.), Biological
Nitrogen Fixation:Towards Poverty Alleviation Through Sustainable Agriculture. Springer
Science. pp 319-320.
- Castro-Sowinski, S., Matan, O., Star, L. and Okon, Y. 2008.
Thiol-redox potential in melanin production and nitrogen fixation by
Sinorhizobiummeliloti. In F. D. Dakora et al., (eds.), Biological Nitrogen
Fixation:Towards Poverty Alleviation Through Sustainable Agriculture. Springer Science. pp
373.
- Lerner, A., Okon, Y. and Burdman, S. 2009 The wzm gene
located in the pRhico plasmid of Azospirillum brasilense Sp7 is involved in
lipopolysaccharide synthesis. Microbiology 155:791-804.
- Spaepen, S., Vanderleyden, J. and Okon, Y. 2009.Plant growth-promoting
actions of rhizobacteria. Advances in Botanical Research 51:283-320.
- Lerner, A., Castro-Sowinski, S., Lerner, H., Okon, Y. and
Burdman, S. 2009. Glycogen phosphorylase is involved in stress endurance and biofilm
formation in Azospirillum brasilense Sp7. FEMS Microbiology Letters 300:75-82.
- Lerner, A., Castro-Sowinski, S., Valverde, A., Lerner, H., Dror, R., Okon,
Y. and Burdman, S. 2009. The Azospirillum brasilense Sp7 noeJ and
noeL genes are involved in extracellular polysaccharide biosynthesis. Microbiology
155:4058-4068.
- Castro-Sowinski, S. Burdman, S., Matan, O. and Okon, Y. 2010.
Functions of PHA in the environment in Chen G-Q Edt. Plastics from Bacteria: Natural
Functions and Applications. Microbiology Monographs (book series) Vol.14 Springer-Verlag
Berlin Heidelberg pp 39-61.
- Baudoin, E., Lerner, A., Mirza, M. S., El Zemrany, H., Prigent-Combaret, C.,
Jurkevich, E., Spaepen, S., Vanderleyden, J., Nazaret, S.,
Okon, Y. and Monne-Loccoz, Y. 2010. Effects of Azospirillum brasilense
PGPR genetically modified with auxin production gene ipdC on the diversity of the
indigenous microbiota of the wheat rhizosphere. Research in Microbiology 161:219-226.
- Lerner, A., Valverde, A., Castro-Sowinski, S., Lerner, H., Okon, Y.
and Burdman, S. (2010). Phenotypic variation in Azospirillum brasilense exposed to
starvation. Environmental Microbiology Reports 2:577-586.
- Medeot, D. B., Paulucci, N. S, Albornoz, A., Fumero, M. V., Bueno, M.,
Garcia, M.B., Woelke, M., Okon, Y. and Dardanelli, M. S. 2010.
Plant growth promoting rhizobacteria improving the legume-rhizobia symbiosis in M.S. Khan
et al. (eds.), Microbes for Legume Improvement, Chapter 19. Springer-Verlag/Wien.
