Plant Growth-Promoting Rhizobacteria: Benign and Useful Substitute for Mitigation of Biotic and Abiotic Stresses

  • Jyoti Singh
  • Prachi Singh
  • Shatrupa Ray
  • Rahul Singh Rajput
  • Harikesh Bahadur Singh
Part of the Microorganisms for Sustainability book series (MICRO, volume 12)


An incessant increase in global population along with a continuous augmentation in abiotic stress conditions, such as temperature, pH, salinity, etc., and limitation of natural resources has posed a serious threat to developing nations in terms of food security and enhanced nutritional value of the yield. Substantial crop losses in both qualitative and quantitative aspects due to the several prevalent phytopathogens are adding severity to the existing trouble. Confrontation with this ongoing problem initially led to the application of chemical fertilizers. However, hazardous aftereffects of the chemical fertilizers on the ecosystem have instigated a demand for a promising eco-friendly substitute that deals with both biotic and abiotic stresses. Rhizospheric microorganisms can be utilized as an effective alternative because they reside in soil and have the intrinsic property of upholding balanced ecosystem. These plant growth-promoting rhizobacteria (PGPRs) enhance plant growth even in poor and stressed environmental conditions by the formation of beneficial associations with the host through biological nitrogen fixation, phosphate solubilization, siderophore and hormone production, etc. They can also trigger host defense mechanism through induced systemic resistance (ISR). These PGPRs are also helpful for phytoremediation by various processes such as direct absorption, accumulation, etc. PGPRs are utilized in the fields of phytostimulation, biofertilization, and biocontrol activities. In the current chapter, we would aim to uphold the mechanisms opted by PGPR for effective plant growth promotion and defense under various abiotic as well as biotic stress conditions. In this context, we would also aim to delve in detail about the host-PGPR cross talk during the onset of stress conditions.


Biotic stresses Abiotic stresses PGPR Phytoremediation Biocontrol 



JS is grateful to CSIR for providing financial support in form CSIR-JRF fellowship. PS and RSR are thankful to UGC for providing financial assistance in the form of UGC-RET fellowship. SR and HBS are thankful to Department of Science and Technology (DST) for awarding project grant (NRDMS/SC/ST/40/016).


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Copyright information

© Springer Nature Singapore Pte Ltd. 2019

Authors and Affiliations

  • Jyoti Singh
    • 1
    • 2
  • Prachi Singh
    • 2
  • Shatrupa Ray
    • 2
  • Rahul Singh Rajput
    • 2
  • Harikesh Bahadur Singh
    • 2
  1. 1.Department of Botany, Center of Advanced Studies, Institute of SciencesBanaras Hindu UniversityVaranasiIndia
  2. 2.Department of Mycology and Plant Pathology, Institute of Agricultural SciencesBanaras Hindu UniversityVaranasiIndia

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