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Rhizospheric Phosphate Solubilizing Bacillus atrophaeus GQJK17 S8 Increases Quinoa Seedling, Withstands Heavy Metals, and Mitigates Salt Stress

Author

Listed:
  • Ismail Mahdi

    (Medical Applications Interface Center, Mohammed VI Polytechnic University, Ben Guerir 43150, Morocco
    Laboratory of Microbial Biotechnologies, Agrosciences and Environment, Faculty of Sciences Semlalia, Cadi Ayyad University, Marrakesh 40000, Morocco)

  • Nidal Fahsi

    (Medical Applications Interface Center, Mohammed VI Polytechnic University, Ben Guerir 43150, Morocco
    Laboratory of Genetic, Neuroendocrinology and Biotechnology, Faculty of Sciences, Ibn Tofail University, Kenitra 14000, Morocco)

  • Mohamed Hafidi

    (Laboratory of Microbial Biotechnologies, Agrosciences and Environment, Faculty of Sciences Semlalia, Cadi Ayyad University, Marrakesh 40000, Morocco
    AgroBioSciences Program, Mohammed VI Polytechnic University, Ben Guerir 43150, Morocco)

  • Saad Benjelloun

    (Modeling Simulation and Data Analysis laboratory (MSDA), Mohammed VI Polytechnic University (UM6P), Ben Guerir 43150, Morocco)

  • Abdelmounaaim Allaoui

    (Laboratory of Molecular Microbiology, CIPEM (Coalition Center, for Innovation, and Prevention of Epidemics in Morocco) (UM6P), Ben Guerir 43150, Morocco
    African Genome Center (AGC), Mohammed VI Polytechnic University (UM6P), Ben Guerir 43150, Morocco)

  • Latefa Biskri

    (Laboratory of Molecular Microbiology, CIPEM (Coalition Center, for Innovation, and Prevention of Epidemics in Morocco) (UM6P), Ben Guerir 43150, Morocco
    African Genome Center (AGC), Mohammed VI Polytechnic University (UM6P), Ben Guerir 43150, Morocco)

Abstract

Introduction of quinoa ( Chenopodium quinoa willd.), a gluten-free nutritious pseudo-cereal, outside its traditional growing areas exposed it to seedling damping-off. Here, we isolated eleven phosphate-solubilizing bacteria from the quinoa rhizosphere and assessed their effect on germination and seedlings growth. All isolates solubilized phosphate, produced indole3-acetic acid, hydrocyanic acid, siderophores, and ammonia. Genotypic analysis revealed that our strains are related to the genus of Bacillus , Pseudomonas , and Enterobacter . Strains Enterobacter asburiae (QD14, QE4, QE6, and QE16), Enterobacter sp. QE3, and Enterobacter hormaechei QE7 withstood 1.5 mg·L −1 of cadmium sulfate, 0.5 mg·mL −1 of nickel nitrate, and 1 mg·mL −1 of copper sulfate. Moreover, all strains solubilized zinc from ZnO; P. Stutzeri QD1 and E. asburiae QD14 did not solubilize Zn 3 (PO 4 ) 2 and CO 3 Zn, whereas CO 3 Zn was not solubilized by E. asburiae QE16. Bacillus atrophaeus S8 tolerated 11% NaCl. P. frederiksbergensis S6 and Pseudomonas sp. S7 induced biofilm formation. Anti-fusarium activity was demonstrated for E. asburiae QE16, P. stutzeri QD1, P. frederiksbergensis S6, Pseudomonas sp. S7, and B. atrophaeus S8. Lastly, inoculation of quinoa seeds with B. atrophaeus S8 and E. asburiae QB1 induced the best germination rate and seedling growth, suggesting their potential use as inoculants for salty and heavy metal or zinc contaminated soils.

Suggested Citation

  • Ismail Mahdi & Nidal Fahsi & Mohamed Hafidi & Saad Benjelloun & Abdelmounaaim Allaoui & Latefa Biskri, 2021. "Rhizospheric Phosphate Solubilizing Bacillus atrophaeus GQJK17 S8 Increases Quinoa Seedling, Withstands Heavy Metals, and Mitigates Salt Stress," Sustainability, MDPI, vol. 13(6), pages 1-22, March.
    • Handle: RePEc:gam:jsusta:v:13:y:2021:i:6:p:3307-:d:518821
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    Cited by:

    1. Atif A. Bamagoos & Hesham F. Alharby & Eman E. Belal & Ahmed E. A. Khalaf & Mahmoud A. Abdelfattah & Mostafa M. Rady & Esmat F. Ali & Gaber A. M. Mersal, 2021. "Phosphate-Solubilizing Bacteria as a Panacea to Alleviate Stress Effects of High Soil CaCO 3 Content in Phaseolus vulgaris with Special Reference to P-Releasing Enzymes," Sustainability, MDPI, vol. 13(13), pages 1-22, June.

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