Plant growth-promoting rhizobacteria (PGPR) are found in the rhizosphere of plants and are beneficial for plant development. Presently, PGPR include representatives from very diverse bacterial taxa. The important genera of PGPR belong to pseudomonads, bacilli, diazotrophic PGPR, actinomycetes, enterobacteria and rhizobia. They promote plant growth by increasing the availability of nutrients and increasing the uptake of nitrogen, phosphorus and other minerals, which are known as trace elements in the plant habitat. PGPR help plants directly by secreting phytohormones and some other plant growth-promoting substances and are used as biofertilizers. PGPR also protect plants against pathogens by exploiting their antagonistic potential. They also induce plant-mediated systematic resistance against above-ground microbial pathogens and chewing insects. Preplant bacterization is a plant-protection strategy through delivery of beneficial endophytic bacteria. The use of PGPR as a biocontrol agent has become an effective method of crop protection.


Biocontrol Agent Fusarium Wilt Plant Growth Promotion Rhizoctonia Solani Hydrogen Cyanide 


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Copyright information

© Springer India 2014

Authors and Affiliations

  • P. Parvatha Reddy
    • 1
  1. 1.Indian Institute of Horticultural ResearchBangaloreIndia

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