<P>Contents; Preface;<STRONG>Taxonomy of rhizobia: An Overview</STRONG>: A. Willems; <STRONG>Genetics of phosphate solubilization and its potential application for improving plant growth-promoting bacteria</STRONG>: H. Rodríguez, R. Fraga, T. Gonzalez & Y. Bashan; <STRONG>Biodiversity of populations of phosphate solubilizing rhizobia that nodulates chickpea in different Spanish soils</STRONG>: R. Rivas, A. Peix, P. F. Mateos, M.E. Trujillo, E. Martínez-Molina & E. Velásquez; <STRONG>Phosphate solubilization activity of rhizobia native to Iranian soils</STRONG>: H. A. Alikhani, N. Saleh-Rastin<SUP> </SUP>& H. Antoun; <STRONG>Differential effects of coinoculations with <EM>Pseudomonas jessenii</EM> PS06 (a phosphate-solubilizing bacterium) and <EM>Mesorhizobium ciceri</EM> C-2/2 strains on the growth and seed yield of chickpea under greenhouse and field conditions</STRONG>: A. Valverde, A. Burgos, T. Fiscella, R. Rivas, E. Velázquez, C. Rodríguez-Barrueco, E. Cervantes, M. Chamber and J. M. Igual; <STRONG>Effect of Tilemsi phosphate rock solubilizing microorganisms on phosphorus-uptake and yield of field grown wheat in Mali</STRONG>: B. A. Hamadoun & H. Antoun; <STRONG>Screening for PGPR to improve growth of <EM>Cistus ladanifer</EM> seedlings for reforestation of degraded mediterranean ecosystems</STRONG>: B. Ramos, T. Pereyra de la Iglesia, A. Probanza, J.A. Lucas García, M. Mejías & F.J.Gutierrez Mañero; <STRONG>Phosphate-solubilizing microorganisms isolated from rhizospheric and bulk soils of colonizer plants at an abandoned rock phosphate mine</STRONG>: I. Reyes, A. Valery & Z. Valduz; <STRONG>Microbial solubilization of rock phosphate on media containing agro-industrial wastes and effect of the resulting products on plant growth and P uptake</STRONG>; N. Vassilev, M. Vassileva, A. Medina & R. Azcón; <STRONG>Making microorganisms mobilize soil phosphorous</STRONG>: A. Richardson; <STRONG>Future trends in research on microbial phosphate solubilization: one hundred years of insolubility</STRONG>: A. H. Goldstein; <STRONG>Molecular methods for biodiversity analysis of phosphate solubilizing bacteria (PSB)</STRONG>: A.Peix , E. Velázquez & E. Martínez-Molina; <STRONG>Taxonomy of phosphate solubilizing bacteria</STRONG>: P. Kämpfer; <STRONG>Taxonomy of filamentous fungi and yeasts that solubilizes phosphate</STRONG>: E. Velázquez & M. E. Trujillo; <STRONG>Phosphate solubilizing microorganisms: effect of Carbon, Nitrogen, and Phosphorus sources</STRONG>: E. Nahas; <STRONG>Efficacy of organic acid secreting bacteria in solubilization of rock phosphate in acidic alfisols</STRONG>: S. Srivastava, M. T. Kausalya, G. Archana, O. P. Rupela & G. Naresh-Kumar; <STRONG>Solubilization of iron and aluminum phosphates in the soil by the fungus <EM>Aspergillus niger</EM></STRONG>: C. B. Barroso & E. Nahas; <STRONG>Fertilizers, food and environment</STRONG>: J. M. Igual & C. Rodríguez-Barrueco; <STRONG>Phosphate Solubilizing Microorganisms vs. Phosphate Mobilizing Microorganisms: What separates a phenotype from a trait?</STRONG>: A. H. Goldstein & P.U. Krishnaraj; <STRONG>Challenges in commercializing a phosphate solubilizing microorganism: <EM>Penicillium bilaiae</EM>, a case history</STRONG>: M. Leggett, J. Cross, G. Hnatowich, & G. Holloway; <STRONG>Interactive effects of phosphate-solubilizing bacteria and mycorrhizal fungi at increasing plant P availability and their evaluation by using isotopic techniques</STRONG>: J. M. Barea, M. Toro & R. Azcón; <STRONG>Distribution pattern and role of phosphate solubilizing bacteria in the enhancement of fertilizer value of rock phosphate in aquaculture ponds: state-of-the-art</STRONG>: B.B. Jana; <STRONG>Construction of a vector for stable chromosomal integration of the <EM>phoc</EM> gene in plant growth- promoting bacteria</STRONG>: R. Fraga-Vidal, H. Rodríguez Mesa & T. González -Díaz de Villegas; <STRONG>Microorganisms with capacity for phosphate solubilization in Dão red wine (Portugal)</STRONG>:<STRONG> </STRONG>L. R. Silva, R. Rivas, A. M. Pinto, P. F. Mateos, E. Martínez-Molina & E. Velásquez; <STRONG>Phosphate solubilizing microorganisms in the rhizosphere of native plants from tropical savannas: an adaptive strategy to acid soils?</STRONG>: M. Toro; <STRONG>Effects of solarization on phosphorus and on other chemical constituents of soil</STRONG>: A.F.M.A. Pinto, L.R. Silva, E. Velázquez, & A.César; <STRONG>Tricalcium-phosphate solubilizing efficiency of rhizosphere bacteria depending on the P-nutritional status of the host plant</STRONG>: A. Deubel, A. Gransee & W. Merbach; <STRONG>Phosphate Solubilizing Microorganisms in the rhizosphere of <EM>Pinus pinaster</EM> and in the mycosphere of associated <EM>Lactarius deliciosus</EM></STRONG>: B. Ramos, J. Barriuso-Maicas, J.A. Lucas García, T. Pereyra de la Iglesia, A. Daza & F.J.Gutierrez Mañero; <STRONG>Characterization of a strain of <EM>Pseudomonas fluorescens</EM> that solubilizes phosphates <EM>in vitro</EM> and produces high antibiotic activity against several microorganisms</STRONG>: M. E. Trujillo, E. Velázquez, S. Miguélez, M. S. Jiménez, P. F. Mateos & E. Martínez-Molina; <STRONG>Phosphate solubilizing Bacteria Isolated from the inside of <EM>Glomus clarum</EM> spores from Cuba</STRONG>: L. Mirabal-Alonso<SUP> </SUP>& E. Ortega-Delgado; <STRONG>Polyphasic characterization of phosphate-solubilizing bacteria isolated from rhizospheric soil of the north-eastern region of Portugal</STRONG>: A. Valverde, J. M. Igual & E. Cervantes; <STRONG>Effects of plant community composition on total soil microbiota and on phosphate-solubilizing bacteria of ex-arable lands</STRONG>: I. Santa-Regina, A. Peix, T. Díaz, C. Rodríguez-Barrueco & E. Velásquez; <STRONG>Population dynamics of p-solubilizers in the rhizosphere of major weed species from a tropical delta soil</STRONG>: S. Seshadri<SUP> </SUP>& C. Lakshminarasimhan; <STRONG>Malic acid mediated aluminum phosphate solubilization by <EM>Penicillium oxalicum</EM> CBPS-3F-Tsa isolated from Korean paddy rhizosphere soil</STRONG>: R. Gadagi & T. Sa; <STRONG>Growth promotion of rice by phosphate solubilizing bioinoculants in a Himalayan location</STRONG>: P. Trivedi, B. Kumar, A. Pandey & L. M. S. Palni; <STRONG>Evaluation of the effect of a dual inoculum of phosphate-solubilizing bacteria and <EM>Azotobacter chroococcum</EM>, in crops of creole potato (papa "criolla"), "yema de huevo" variety (<EM>Solanum phureja</EM>)</STRONG>: G. Faccini, S. Garzón, M. Martínez & A. Varela; <STRONG>Effect of inoculation with a strain of <EM>Pseudomonas fragi</EM> in the growth and phosphorous content of strawberry plants</STRONG>: L. Martín, E. Velázquez, R. Rivas, P. F. Mateos, E. Martínez-Molina, C. Rodríguez-Barrueco & A. Peix; <STRONG>Effects of phosphate solubilizing bacteria during the rooting period of sugar cane (<EM>Saccharum officinarum</EM>), Venezuela 5171 variety, on the grower´s oasis substrate</STRONG>: M. Martínez & A. Martínez; <STRONG>Phosphate Solubilizing Bacteria Isolated from the Rhizosphere Soil and its Growth Promotion on Black Pepper (<EM>Piper nigrum.</EM> L) Cuttings</STRONG>: K. Ramachandran, V. Srinivasan, S. Hamza & M. Anandaraj; <STRONG>Effect of phosphorous solubilizing bacteria on the rhizobia–legume symbiosis</STRONG>: S. B. Rosas, M. Rovera, J. A. Andrés & N. S. Correa; <STRONG>Defense response in bean roots is not affected by low-phosphate nutrition</STRONG>: L. Alvarez-Manrique, A. Richards & E. Soriano; <STRONG>Solubilization of phosphate by a strain of Rhizobium leguminosarum bv. trifolii isolated from <EM>Phaseolus vulgaris</EM> in El Chaco Arido soil (Argentina)</STRONG>: A. Abril, J. L. Zurdo-Piñeiro, A. Peix, R. Rivas & E. Velásquez; <STRONG>Effect of phosphate solubilizing bacteria on role of <EM>Rhizobium</EM> on nodulation by soybean</STRONG>: D.L.Wasule, S .R. Wadyalkar & A.N.Buldeo; <STRONG><EM>Phaseolus lunatus</EM> is nodulated by a phosphate solubilizing strain of <EM>Sinorhizobium meliloti</EM> in a Peruvian soil</STRONG>: E. Ormeño, R. Torres, J. Mayo, R. Rivas, A. Peix, E. Velázquez, D. Zúñiga; <STRONG>Phosphate solubilizing rhizobia originating from <EM>Medicago, Melilotus</EM> and <EM>Trigonella </EM>grown in a Spanish soil</STRONG>: M. Villar-Igea, E. Velázquez, R. Rivas, A. Willems, P. van Berkum, M. E. Trujillo, P. F. Mateos, M. Gillis & E. Martínez-Molina; <STRONG>Effect of phosphorous on nodulation in nitrogen fixation by <EM>Phaseolus vulgaris</EM></STRONG>: M. Olivera, N. Tejera, C. Iribarne, A. Ocaña & C. Lluch; <STRONG><EM>Phaseolus vulgaris</EM> is nodulated by phosphate solubilizing strains from a new genomic group of <EM>Sinorhizobium meliloti</EM> in Canary Island soils</STRONG>: J. L. Zurdo-Piñeiro, A. Peix, R. Rivas, M. León-Barrios, A. Garrido-Martín, R. Pérez-Galdona, P. F. Mateos, E. Martínez-Molina & E. Velásquez; <STRONG>Role of arbuscular mycorrhizal fungi in the uptake of phosphorus by micropropagated blackberry (<EM>Rubus fruticosus</EM> var. brazos) plants</STRONG>: Y. Carreón- Abud<SUP> </SUP>& E. Soriano- Bello; <STRONG>Effect of plant species and mycorrhizal inoculation on soil phosphate-solubilizing microorganisms rhizosphere in semi-arid brazil: growth promotion effect of rhizospheric phosphate-solubilizing microorganisms on <EM>Eucalyptus camaldulensis</EM></STRONG>: M. R. Scotti, N. Sá, I. Marriel, L. C. Carvalhais, P. P. Pinto, S. R. Matias, E. J. Corrêa, N. Freitas, M. A. Sugai, R. V. Passos; <STRONG>The interactive effects of arbuscular mycorrhizal fungi and rhizobacteria on the growth and nutrients uptake of sorghum in acid soil</STRONG>: J. Widada, D. I. Damarjaya, and S. Kabirun; <STRONG>Fertilizer potential of phosphorus recovered from wastewater treatments</STRONG>: L. E. de-Bashan & Y. Bashan; <STRONG>Microalgae growth-promoting bacteria as "helpers" for microalgae: a novel approach for removing ammonium and phosphorus from municipal wastewater</STRONG>: L. E. de-Bashan, J. P. Hernandez & Y. Bashan; <STRONG>Immobilization of mercury in soils of Venezuela using phospho-gypsum and sulphate-reducing bacteria</STRONG>: E. Adams, A. García-Sánchez, F. Santos, E. Velázquez & M. Adams-Meléndez; <STRONG>Soil phosphate solubilizing microorganisms and cellulolitic population as biological indicators of iron mined land rehabilitation</STRONG>: M.R.M. Scotti, N.H. Sá, S.R. Matias, R. Passos, J. R. Stehmann & J.P. Lemos-Filho; <STRONG>Effect of certain phosphate solubilizing bacteria on root-knot nematode disease of mungbean</STRONG>: M. R. Khan; <STRONG>Two strains isolated from tumours of <EM>Prunus persica</EM> are able to solubilize phosphate <EM>in vitro</EM></STRONG>: J. L. Palomo, P. García-Benavides, P. F. Mateos, E. Martínez-Molina & E. Velásquez; <STRONG>Inorganic phosphate solubilization by two insect pathogenic <EM>Bacillus sp</EM>.</STRONG>: S. Seshadri, S. Ignacimuthu,<SUP> </SUP>M. Vadivelu<SUP> </SUP>& C. Lakshminarasimhan; <STRONG>Effect of certain fungal and bacterial phosphate solubilizing microorganisms on the fusarial wilt of tomato</STRONG>: M. R. Khan & S. M. Khan</P>