Journal
SUSTAINABILITY
Volume 13, Issue 6, Pages -Publisher
MDPI
DOI: 10.3390/su13063307
Keywords
Chenopodium quinoa willd; phosphate-solubilizing bacteria; plant growth promotion; zinc-solubilizing bacteria; quinoa seed germination; salt tolerance; heavy metal bioremediation; antibiotic resistance
Funding
- welcome grant from the Mohammed VI Polytechnic University (UM6P) of Ben Guerir, Morocco
Ask authors/readers for more resources
This study isolated phosphate-solubilizing bacteria from the rhizosphere of quinoa and found that some strains demonstrated tolerance to heavy metals and induced biofilm formation. Inoculation of quinoa seeds with certain bacterial strains showed improved germination rate and seedling growth, suggesting their potential use as inoculants for salty and heavy metal or zinc contaminated soils.
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 center dot L-1 of cadmium sulfate, 0.5 mg center dot mL(-1) of nickel nitrate, and 1 mg center dot mL(-1) of copper sulfate. Moreover, all strains solubilized zinc from ZnO; P. Stutzeri QD1 and E. asburiae QD14 did not solubilize Zn-3(PO4)(2) and CO3Zn, whereas CO3Zn 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.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available