Last decade has seen a significantly increased knowledge about phosphate solubilizing microorganisms. Sixty specialists from thirteen countries met in Salamanca to discuss the problems of the high P-unavailability as a soil nutrient for crops, and the hazards of an increasing phosphate input to aquatic habitats from industrial and mining activities, sewage disposal, detergents, and other sources. Updated solutions to enhance P-uptake by plants, bioremediation potential in the rehabilitation of ecosystems, taxonomic characterization interactions with mycorrizae, the physiological and molecular basis of PSM, and possibilities of genetic modifications of rhizospheric microorganisms were among the contributions presented. Challenges in commercializing a phosphate solubilizing microorganism were also outlined by a relevant biotech company. The book will fill a gap in agricultural libraries and it is a wish of the editors to attract the attention of agronomists, environmentalist, technocrats and administrators holding responsibilities in the field of soil conservation and sustainable agricultural production.

Shows basic and strategic research related to: taxonomy and diversity of PSM with an emphasis in the rhizobia and in interactions between phosphate solubilizing bacteria and mycorrizae Physiology and molecular basis of microbial phosphate solubilization PSM as biofertilizers and their use in bioremediation

Zusammenfassung

In 2002, sixty international specialists met to discuss problems of high P-unavailability as a soil nutrient for crops, and the hazards of increased phosphate input to aquatic habitats from industrial and mining activities, sewage disposal, detergents, and other sources. Among the presentations were updated solutions to enhance P-uptake by plants, bioremediation potential in the rehabilitation of ecosystems, taxonomic characterization interactions with mycorrizae, the physiological and molecular basis of PSM, and more.

Inhalt

From the contents

Taxonomy of rhizobia: An Overview: A. Willems; Genetics of phosphate solubilization and its potential application for improving plant growth-promoting bacteria: H. Rodríguez, R. Fraga, T. Gonzalez and Y. Bashan; Biodiversity of populations of phosphate solubilizing rhizobia that nodulates chickpea in different Spanish soils: R. Rivas, A. Peix, P. F. Mateos, M.E. Trujillo, E. Martínez-Molina and E. Velásquez; Phosphate solubilization activity of rhizobia native to Iranian soils: H. A. Alikhani, N. Saleh-Rastin and H. Antoun; Differential effects of coinoculations with Pseudomonas jessenii PS06 (a phosphate-solubilizing bacterium) and Mesorhizobium ciceri C-2/2 strains on the growth and seed yield of chickpea under greenhouse and field conditions: A. Valverde, A. Burgos, T. Fiscella, R. Rivas, E. Velázquez, C. Rodríguez-Barrueco, E. Cervantes, M. Chamber and J. M. Igual; Effect of Tilemsi phosphate rock solubilizing microorganisms on phosphorus-uptake and yield of field grown wheat in Mali: B. A. Hamadoun and H. Antoun; Screening for PGPR to improve growth of Cistus ladanifer seedlings for reforestation of degraded mediterranean ecosystems: B. Ramos, T. Pereyra de la Iglesia, A. Probanza, J.A. Lucas García, M. Mejías and F.J.Gutierrez Mañero; Phosphate-solubilizing microorganisms isolated from rhizospheric and bulk soils of colonizer plants at an abandoned rock phosphate mine: I. Reyes, A. Valery and Z. Valduz; Microbial solubilization of rock phosphate on media containing agro-industrial wastes and effect of the resulting products on plant growth and P uptake; N. Vassilev, M. Vassileva, A. Medina and R. Azcón; Making microorganisms mobilize soil phosphorous: A. Richardson; Future trends in research on microbial phosphate solubilization: one hundred years of insolubility: A. H. Goldstein; Molecular methods for biodiversity analysis of phosphate solubilizing bacteria (PSB): A.Peix , E. Velázquez and E. Martínez-Molina; Taxonomyof phosphate solubilizing bacteria: P. Kämpfer; Taxonomy of filamentous fungi and yeasts that solubilizes phosphate: E. Velázquez and M. E. Trujillo; Phosphate solubilizing microorganisms: effect of Carbon, Nitrogen, and Phosphorus sources: E. Nahas; Efficacy of organic acid secreting bacteria in solubilization of rock phosphate in acidic alfisols: S. Srivastava, M. T. Kausalya, G. Archana, O. P. Rupela and G. Naresh-Kumar; Solubilization of iron and aluminum phosphates in the soil by the fungus Aspergillus niger: C. B. Barroso and E. Nahas; Fertilizers, food and environment: J. M. Igual and C. Rodríguez-Barrueco; Phosphate Solubilizing Microorganisms vs. Phosphate Mobilizing Microorganisms: What separates a phenotype from a trait?: A. H. Goldstein and P.U. Krishnaraj; Challenges in commercializing a phosphate solubilizing microorganism: Penicillium bilaiae, a case history: M. Leggett, J. Cross, G. Hnatowich, and G. Holloway; Interactive effects of phosphate-solubilizing bacteria and mycorrhizal fungi at increasing plant P availability and their evaluation by using isotopic techniques: J. M. Barea, M. Toro and R. Azcón; Distribution pattern and role of phosphate solubilizing bacteria in the enhancement of fertilizer value of rock phosphate in aquaculture ponds: state of the art: B.B. Jana; Construction of a vector for stable chromosomal integration of the phoc gene in plant growth- promoting bacteria: R. Fraga-Vidal, H. Rodríguez Mesa and T. González -Díaz de Villegas; Microorganisms with capacity for phosphate solubilization in Dão red wine (Portugal): L. R. Silva, R. Rivas, A. M. Pinto, P. F. Mateos, E. Martínez-Molina and E. Velásquez.