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Environmental Science and Pollution Research

, Volume 26, Issue 19, pp 19804–19813 | Cite as

Effect of rhizospheric and endophytic bacteria with multiple plant growth promoting traits on wheat growth

  • Somayeh EmamiEmail author
  • Hossein Ali Alikhani
  • Ahmad Ali Pourbabaei
  • Hassan Etesami
  • Fereydoon Sarmadian
  • Babak Motessharezadeh
Research Article

Abstract

The present study focused on the characterization of plant growth promoting rhizospheric (R) and endophytic (E) bacteria and their impact on wheat cultivars growth. In this study, 400 strains were isolated from the rhizosphere soil (250 isolates) and surface-sterilized roots (150 isolates) of wheat and screened for their ability to plant growth promotion (PGP) traits. Four R isolates and four E isolates with different ability were selected to investigate the interaction between R and B bacteria associated with wheat cultivars under in vitro and greenhouse conditions. Plant growth parameters were found to be enhanced by the combined inoculation of two groups of R and E bacteria compared to individual inoculations (respectively 33.7 and 37.8% increase in root and shoot dry weight), suggesting that PGP rhizobacteria acted synergistically with PGP endophytes in phosphate solubilization. Compared to inoculation with phosphate-solubilizing bacteria (PSB) or indole-3-acetic acid producer bacteria (IAA-PB), inoculation by bacteria with multiple PGP properties (PSB and IAA-PS) showed higher promotion capacity. Also, in greenhouse assay, bacterial inoculation had a positive effect on the soil dehydrogenase (70.2%) and phosphatase (52.2%) activity. It seems PGP traits do not work independently of each other but additively as it was suggested in the “synergistic hypothesis” that multiple mechanisms are responsible for the plant growth promotion and increased yield. Findings of this study could improve the current bio-fertilizer production procedure in research and related industries.

Keywords

Endophyte IAA production Phosphate solubilization Rhizobacteria 

Notes

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Copyright information

© Springer-Verlag GmbH Germany, part of Springer Nature 2019

Authors and Affiliations

  • Somayeh Emami
    • 1
    Email author
  • Hossein Ali Alikhani
    • 1
  • Ahmad Ali Pourbabaei
    • 1
  • Hassan Etesami
    • 1
  • Fereydoon Sarmadian
    • 1
  • Babak Motessharezadeh
    • 1
  1. 1.Department of Soil Science Engineering, Faculty of Agricultural Engineering and TechnologyUniversity of TehranKarajIran

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