Effect of Inoculation and Co-inoculation of Acinetobacter sp. RG30 and Pseudomonas putida GN04 on Growth, Fitness, and Copper Accumulation of Maize (Zea mays)

Phytoremediation can be assisted by microorganisms, which promote plant growth and increase heavy metal availability in soil. In this study, we aimed at evaluating the effect of two plant growth-promoting bacteria (PGPB) on phytoextraction of copper (Cu) by maize. We chose the strains based on their...

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Bibliographic Details
Published in:Water, air, and soil pollution air, and soil pollution, 2014-12, Vol.225 (12), p.1-13, Article 2232
Main Authors: Rojas-Tapias, Daniel Fernando, Bonilla, Ruth, Dussán, Jenny
Format: Article
Language:English
Subjects:
Acinetobacter
Atmospheric Protection/Air Quality Control/Air Pollution
Bacteria
Biomass energy
Bioremediation
Chelating agents
Chlorophyll
Climate Change/Climate Change Impacts
Copper
Corn
Earth and Environmental Science
Electric properties
Environment
Environmental monitoring
Experiments
Growth
Heavy metals
Hydrogeology
Inoculation
Metals
Microorganisms
Nutrition
Phosphorus
Photosynthesis
Phytoremediation
Plant extracts
Plant growth
Polluted environments
Pseudomonas putida
Siderophores
Soil conductivity
Soil contamination
Soil microorganisms
Soil pollution
Soil Science & Conservation
Strains (organisms)
Water Quality/Water Pollution
Zea mays
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Summary:Phytoremediation can be assisted by microorganisms, which promote plant growth and increase heavy metal availability in soil. In this study, we aimed at evaluating the effect of two plant growth-promoting bacteria (PGPB) on phytoextraction of copper (Cu) by maize. We chose the strains based on their ability to synthesize indole compounds, produce siderophores, solubilize phosphorus, and increase soil conductivity and extractable Cu in soil. Then, in glasshouse experiments, we assessed their ability to increase biomass, chlorophyll content, and Cu extraction by maize. Results showed that Acinetobacter sp. RG30 and Pseudomonas putida GN04 were overall the most active strains to synthesize indole, produce siderophores, and solubilize phosphorus, and hence selected for further studies. Also, both were able to significantly increase soil conductivity and release Cu from soil compared to control. Glasshouse experiments showed that Cu had a negative effect on plant growth, but inoculation with bacteria promoted plant growth and chlorophyll content in its presence ( p  
ISSN:0049-6979
1573-2932
DOI:10.1007/s11270-014-2232-2