Plant growth-promoting rhizobacteria present status and future prospects

International audience; Fluorescent pseudomonads have been widely tested for their ability to promote plant growth and to suppress soilborne diseases. Their efficacy is both related to their activity and to their density in the rhizosphere. To enable the introduction of a number of bacterial cells high enough to allow the expression of their beneficial activities, the strain must be produced at a low cost. In order to optimise the inoculum production of the biocontrol agent Pseudomonas fluorescens C7R12, different combinations of carbon, nitrogen and yeast extract including the reference King's B medium (KB) were compared using a central composite design. Among the different growing media t…