The plant growth-promoting effect of the nitrogen-fixing endophyte Pseudomonas stutzeri A15

The use of plant growth-promoting rhizobacteria as a sustainable alternative for chemical nitrogen fertilizers has been explored for many economically important crops. For one such strain isolated from rice rhizosphere and endosphere, nitrogen-fixing Pseudomonas stutzeri A15, unequivocal evidence of...

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Bibliographic Details
Published in:Archives of microbiology 2017-04, Vol.199 (3), p.513-517
Main Authors: Pham, Van T. K., Rediers, Hans, Ghequire, Maarten G. K., Nguyen, Hiep H., De Mot, René, Vanderleyden, Jos, Spaepen, Stijn
Format: Article
Language:English
Subjects:
Aquatic plants
Baskets
Biochemistry
Biofertilizers
Biomedical and Life Sciences
Biotechnology
Cell Biology
Ecology
Economic importance
Endophytes - physiology
Life Sciences
Microbial Ecology
Microbiology
Mutation
Nitrogen
Nitrogen - pharmacology
Nitrogen fixation
Nitrogen Fixation - drug effects
Nitrogen Fixation - genetics
Nitrogen Fixation - physiology
Oryza - microbiology
Plant Development - drug effects
Plant Development - physiology
Plant growth
Plant Roots - microbiology
Pseudomonas stutzeri - physiology
Rhizosphere
Seedlings
Short Communication
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Summary:The use of plant growth-promoting rhizobacteria as a sustainable alternative for chemical nitrogen fertilizers has been explored for many economically important crops. For one such strain isolated from rice rhizosphere and endosphere, nitrogen-fixing Pseudomonas stutzeri A15, unequivocal evidence of the plant growth-promoting effect and the potential contribution of biological nitrogen fixation (BNF) is still lacking. In this study, we investigated the effect of P. stutzeri A15 inoculation on the growth of rice seedlings in greenhouse conditions. P. stutzeri A15 induced significant growth promotion compared to uninoculated rice seedlings. Furthermore, inoculation with strain A15 performed significantly better than chemical nitrogen fertilization, clearly pointing to the potential of this bacterium as biofertilizer. To assess the contribution of BNF to the plant growth-promoting effect, rice seedlings were also inoculated with a nitrogen fixation-deficient mutant. Our results suggest that BNF (at best) only partially contributes to the stimulation of plant growth.
ISSN:0302-8933
1432-072X
DOI:10.1007/s00203-016-1332-3