Revisiting the plant growth-promoting rhizobacteria: lessons from the past and objectives for the future

Abhinav Aeron, Ekta Khare, Chaitanya Kumar Jha, Vijay Singh Meena, Shadia Mohammed Abdel Aziz, Mohammed Tofazzal Islam, Kangmin Kim, Sunita Kumari Meena, Arunava Pattanayak, Hosahatti Rajashekara, Ramesh Chandra Dubey, Bihari Ram Maurya, Dinesh Kumar Maheshwari, Meenu Saraf, Mahipal Choudhary, Rajhans Verma, H. N. Meena, A. R.N.S. Subbanna, Manoj Parihar, Shruti ShuklaGovarthanan Muthusamy, Ram Swaroop Bana, Vivek K. Bajpai, Young Kyu Han, Mahfuzur Rahman, Dileep Kumar, Norang Pal Singh, Rajesh Kumar Meena

Research output: Contribution to journalReview articlepeer-review

70 Scopus citations

Abstract

Plant beneficial rhizobacteria (PBR) is a group of naturally occurring rhizospheric microbes that enhance nutrient availability and induce biotic and abiotic stress tolerance through a wide array of mechanisms to enhance agricultural sustainability. Application of PBR has the potential to reduce worldwide requirement of agricultural chemicals and improve agro-ecological sustainability. The PBR exert their beneficial effects in three major ways; (1) fix atmospheric nitrogen and synthesize specific compounds to promote plant growth, (2) solubilize essential mineral nutrients in soils for plant uptake, and (3) produce antimicrobial substances and induce systemic resistance in host plants to protect them from biotic and abiotic stresses. Application of PBR as suitable inoculants appears to be a viable alternative technology to synthetic fertilizers and pesticides. Furthermore, PBR enhance nutrient and water use efficiency, influence dynamics of mineral recycling, and tolerance of plants to other environmental stresses by improving health of soils. This report provides comprehensive reviews and discusses beneficial effects of PBR on plant and soil health. Considering their multitude of functions to improve plant and soil health, we propose to call the plant growth-promoting bacteria (PGPR) as PBR.

Original languageEnglish
Pages (from-to)665-676
Number of pages12
JournalArchives of Microbiology
Volume202
Issue number4
DOIs
StatePublished - 1 May 2020

Keywords

  • Agro-ecosystems
  • Microbial diversity
  • Mineral solubilization
  • Plant-beneficial rhizobacteria (PBR)
  • Soil–plant–microbes interaction

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