Plant Growth Promoting Rhizobacteria

PGPR (Plant Growth Promoting Rhyzobacteria) supports the next generation of nutrients: A polymicrobial suspension developed from selected naturally occurring endospore-forming bacterial isolates. Isolates are maintained in pure culture ensuring quality control in each and every batch. This quality control feature is verified via genetic analysis. When selected rhyzobacteria are combined, they provide a microbial inoculant of PGPRs that are designed to enhance nutrient products within a wide range of plant biomes. This “Bio-Charged” nutrient solution is designed to provide greater nutrient utilization and efficiency. This solution provides a buffering or moderating link between soil health/ chemistry and plant productivity. 

PGPR has the natural ability to improve nutrient utilization which helps the plant to better tolerate biotic and abiotic interactions. This is done through the production and ultimate release of secondary metabolites (i.e. enzymes, lipopeptides, biosurfactants, etc.) into the rhizosphere which then impact plant processes such as nutrient availability, root hair proliferation, and systemic mechanisms, just to name a few. Once PGPR is applied to the rhizosphere and / or phyllosphere, the PGPR metabolites are absorbed by the plants to promote a healthy plant with a more pronounced root system, and ultimately helps to improve plant quality. Key Grow Solutions’ PGPR, when incorporated into fertilizer solutions, truly becomes an easy-to-use “Bio-Charged” nutrient package. 


How do PGPRs work? 

Metabolites produced by PGPRs promote plant health by stimulating root development and a canopy with a greater photosynthetic potential–greater leaf area index. Plant health is influenced indirectly by the production of nutrient solubilizing enzymes and organic acids. The secondary benefit is the production of defensive compounds creating tolerance to biotic and abiotic stresses. Once these bacterial endospores “germinate”, they begin normal multiplication and colonization of the rhizosphere. This gives rise to root and shoot growth, lateral root and root hair development, increased leaf surface area and chlorophyll content, and higher plant productivity. This allows for: 

  • Maximized nutrient utilization 
  • Increased root growth 
  • Improved density and vigor 

PGPR technology can be found in Key Grow Solutions’ White Royal for your plant’s vegetative stage and Red Royal for your plant’s bloom phase.