Abstract
Lentil (Lens culnaris Medik.) is an invaluable source of dietary protein for the majority of Ethiopian population. The low availability of phosphorus is one of the major soil related stresses that limit the production of this crop. This study was aimed at isolation and characterization of phosphate solubilizing bacteria from lentil growing areas of Ethiopia and evaluating their effects on growth of this crop under greenhouse conditions. In total, 41 phosphate solubilizing bacterial strains were isolated from lentil rhizosphere and characterized using biochemical tests and 16S rDNA sequence analysis. The results showed the presence of genera Acinetobacter, Agrobacterium, Bacillus, Burkholderia, Chryseomonas, Enterobacter, Pseudomonas, Ralstonia and Sphingomonas. Phosphate solubilzing efficiencies of these isolates were evaluated in liquid medium using different insoluble P-sources and the result indicated that they released considerable amount of phosphates from tricalcium phosphate, rock phosphate and bone meal. Besides, some of these isolates exhibited multiple plant growth promoting characteristics such as indole acetic acid production and growth inhibition of Fusarium oxysporum under in vitro conditions. The effects of inoculation of Enterobacter kobei (PSBL5), Bacillus subtilis (PSBL21), Enterobacter species (PSBL26), Bacillus species (PSBL31) and Pseudomonas fluorescence (PSBL37) on lentil growth, nodulation, N and P content of shoot were evaluated under a greenhouse conditions and the results showed that these features were significantly increased over uninoculated control plants. Based on the results of this study, we conclude that lentil rhizosphere soil from producing areas of Ethiopia harbor diverse phosphate solubilizing bacterial strains with excellent phosphate solubilization and plant growth promotion ability. Thus, most of the promising strains should be tested in the field conditions under different agroecology of the country. Key words: Rhizosphere soil, PGPR, rock phosphate, bone meal.
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Claims 8
Claim · model-written summary
Forty-one phosphate-solubilizing strains were isolated from lentil rhizosphere.
- Taxon
- lentil
Lens culinarist0 - Outcome
- phosphate solubilizing bacterial strainse0
- Value
- 41e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“lentil”
e0“In total, 41 phosphate solubilizing bacterial strains were isolated from lentil rhizosphere”
Claim · model-written summary
Isolates included nine named bacterial genera.
- Taxon
- lentilLens culinarist0
- Outcome
- presence of genera Acinetobacter, Agrobacterium, Bacillus, Burkholderia, Chryseomonas, Enterobacter, Pseudomonas, Ralstonia and Sphingomonase0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“lentil”
e0“The results showed the presence of genera Acinetobacter, Agrobacterium, Bacillus, Burkholderia, Chryseomonas, Enterobacter, Pseudomonas, Ralstonia and Sphingomonas.”
Claim · model-written summary
Lentil rhizobacteria released phosphate from tricalcium phosphate, rock phosphate and bone meal.
- Taxon
- lentilLens culinarist0
- Outcome
- phosphatese0
- Qualifier
- tricalcium phosphate, rock phosphate and bone meale0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“lentil”
e0“they released considerable amount of phosphates from tricalcium phosphate, rock phosphate and bone meal”
Claim · model-written summary
Some lentil rhizosphere isolates produced indole acetic acid.
- Taxon
- lentilLens culinarist0
- Outcome
- indole acetic acid productione0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“lentil”
e0“some of these isolates exhibited multiple plant growth promoting characteristics such as indole acetic acid production”
Claim · model-written summary
Some isolates inhibited Fusarium oxysporum growth in vitro.
- Taxon
- lentilLens culinarist0
- Interactor
- Fusarium oxysporum
_(Fusarium_oxysporum_f.sp._batatas)_1234227-PPT-Clemson_University.jpg?width=60)
Fusarium oxysporume0pathogen - Outcome
- growth inhibition of Fusarium oxysporume0
- Direction
- inhibitione0
- Setting
- in vitro conditionse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
_(Fusarium_oxysporum_f.sp._batatas)_1234227-PPT-Clemson_University.jpg?width=500)
Verbatim
t0“lentil”
e0“growth inhibition of Fusarium oxysporum under in vitro conditions”
Claim · model-written summary
Inoculation with selected phosphate-solubilizing isolates significantly increased lentil growth and nodulation relative to uninoculated controls.
- Taxon
- lentilLens culinarist0
- Treatment
- inoculation of Enterobacter kobei (PSBL5), Bacillus subtilis (PSBL21), Enterobacter species (PSBL26), Bacillus species (PSBL31) and Pseudomonas fluorescence (PSBL37)e0
- Outcome
- lentil growth, nodulatione0
- Direction
- increasede0
- Comparator
- uninoculated control plantse0
- Setting
- greenhouse conditionse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“lentil”
e0“The effects of inoculation of Enterobacter kobei (PSBL5), Bacillus subtilis (PSBL21), Enterobacter species (PSBL26), Bacillus species (PSBL31) and Pseudomonas fluorescence (PSBL37) on lentil growth, nodulation, N and P content of shoot were evaluated under a greenhouse conditions and the results showed that these features were significantly increased over uninoculated control plants.”
Claim · model-written summary
Inoculation with selected isolates significantly increased shoot N and P content relative to uninoculated controls.
- Taxon
- lentilLens culinarist0
- Treatment
- inoculation of Enterobacter kobei (PSBL5), Bacillus subtilis (PSBL21), Enterobacter species (PSBL26), Bacillus species (PSBL31) and Pseudomonas fluorescence (PSBL37)e0
- Outcome
- N and P content of shoote0
- Direction
- increasede0
- Comparator
- uninoculated control plantse0
- Setting
- greenhouse conditionse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“lentil”
e0“The effects of inoculation of Enterobacter kobei (PSBL5), Bacillus subtilis (PSBL21), Enterobacter species (PSBL26), Bacillus species (PSBL31) and Pseudomonas fluorescence (PSBL37) on lentil growth, nodulation, N and P content of shoot were evaluated under a greenhouse conditions and the results showed that these features were significantly increased over uninoculated control plants.”
Claim · model-written summary
The authors recommend testing promising lentil rhizobacteria in field conditions.
- Taxon
- lentilLens culinarist0
- Outcome
- promising strains should be tested in the field conditionse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“lentil”
e0“most of the promising strains should be tested in the field conditions under different agroecology of the country”
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