Plant growth promotion rhizobacteria in onion production

The aim of the research was to examine the effect of rhizospheric bacteria Azotobacter chroococcum, Pseudomonas fluorescens (strains 1 and 2) and Bacillus subtilis on the growth and yield of onion and on the microorganisms in the rhizosphere of onion. The ability of microorganisms to produce indole-...

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Bibliographic Details
Published in:Polish journal of microbiology 2014, Vol.63 (1), p.83-88
Main Authors: Colo, Josip, Hajnal-Jafari, Timea I, Durić, Simonida, Stamenov, Dragana, Hamidović, Saud
Format: Article
Language:English
Subjects:
Azotobacter - physiology
Bacillus subtilis - physiology
Indoleacetic Acids - metabolism
Onions - growth & development
Phosphates - chemistry
Plant growth
Pseudomonas fluorescens - physiology
Siderophores - metabolism
Soil Microbiology
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Summary:The aim of the research was to examine the effect of rhizospheric bacteria Azotobacter chroococcum, Pseudomonas fluorescens (strains 1 and 2) and Bacillus subtilis on the growth and yield of onion and on the microorganisms in the rhizosphere of onion. The ability of microorganisms to produce indole-acetic acid (IAA), siderophores and to solubilize tricalcium phosphate (TCP) was also assessed. The experiment was conducted in field conditions, in chernozem type of soil. Bacillus subtilis was the best producer of IAA, whereas Pseudomonas fluorescens strains were better at producing siderophores and solubilizing phosphates. The longest seedling was observed with the application of Azotobacter chroococcum. The height of the plants sixty days after sowing was greater in all the inoculated variants than in the control. The highest onion yield was observed in Bacillus subtilis and Azotobacter chroococcum variants. The total number of bacteria and the number of Azotobacter chroococcum were larger in all the inoculated variants then in the control. The number of fungi decreased in most of the inoculated variants, whereas the number of actinomycetes decreased or remained the same.
ISSN:1733-1331
2544-4646
DOI:10.33073/pjm-2014-012