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Plant Growth-Promoting Rhizobacteria Isolated from Degraded Habitat Enhance Drought Tolerance of Acacia (Acacia abyssinica Hochst. ex Benth.) Seedlings
Joint Authors
Getahun, Alemayehu
Muleta, Diriba
Assefa, Fassil
Kiros, Solomon
Source
International Journal of Microbiology
Issue
Vol. 2020, Issue 2020 (31 Dec. 2020), pp.1-13, 13 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2020-10-29
Country of Publication
Egypt
No. of Pages
13
Main Subjects
Abstract EN
Drought stress (DS) is the most impacting global phenomenon affecting the ecological balance of a particular habitat.
The search for potential plant growth-promoting rhizobacteria (PGPR) capable of enhancing plant tolerance to drought stress is needed.
Thus, this study was initiated to evaluate the effect of inoculating Acacia abyssinica seedlings with PGPR isolated from rhizosphere soil of Ethiopia to enhance DS tolerance.
The strains were selected based on in vitro assays associated with tolerance to drought and other beneficial traits such as salinity, acidity, temperature, heavy metal tolerances, biofilm formation, and exopolysaccharide (EPS) production.
The strains with the best DS tolerance ability were selected for the greenhouse trials with acacia plants.
The results indicate that out of 73 strains, 10 (14%) were completely tolerant to 40% polyethylene glycol.
Moreover, 37% of the strains were strong biofilm producers, while 66 (90.41%) were EPS producers with a better production in the medium containing sucrose at 28 ± 2°C and pH 7 ± 0.2.
Strains PS-16 and RS-79 showed tolerance to 11% NaCl.
All the strains were able to grow in wider ranges of pH (4–10) and temperature (15–45°C) and had high tolerance to heavy metals.
The inoculated bacterial strains significantly (p≤0.05) increased root and shoot length and dry biomass of acacia plants.
One of the strains identified as P.
fluorescens strain FB-49 was outstanding in enhancing DS tolerance compared to the single inoculants and comparable to consortia.
Stress-tolerant PGPR could be used to enhance acacia DS tolerance after testing other phytobeneficial traits.
American Psychological Association (APA)
Getahun, Alemayehu& Muleta, Diriba& Assefa, Fassil& Kiros, Solomon. 2020. Plant Growth-Promoting Rhizobacteria Isolated from Degraded Habitat Enhance Drought Tolerance of Acacia (Acacia abyssinica Hochst. ex Benth.) Seedlings. International Journal of Microbiology،Vol. 2020, no. 2020, pp.1-13.
https://search.emarefa.net/detail/BIM-1172534
Modern Language Association (MLA)
Getahun, Alemayehu…[et al.]. Plant Growth-Promoting Rhizobacteria Isolated from Degraded Habitat Enhance Drought Tolerance of Acacia (Acacia abyssinica Hochst. ex Benth.) Seedlings. International Journal of Microbiology No. 2020 (2020), pp.1-13.
https://search.emarefa.net/detail/BIM-1172534
American Medical Association (AMA)
Getahun, Alemayehu& Muleta, Diriba& Assefa, Fassil& Kiros, Solomon. Plant Growth-Promoting Rhizobacteria Isolated from Degraded Habitat Enhance Drought Tolerance of Acacia (Acacia abyssinica Hochst. ex Benth.) Seedlings. International Journal of Microbiology. 2020. Vol. 2020, no. 2020, pp.1-13.
https://search.emarefa.net/detail/BIM-1172534
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-1172534