Abstract
Plant-growth-promoting rhizobacteria (PGPR) are soil bacteria colonizing the rhizosphere and the rhizoplane which have an effect on plant growth through multiple chemical compounds. Rhizobacteria with beneficial effects for plants could therefore be used to reduce the dependence on synthetic chemical fertilizers in conventional agriculture. Within this study, 67 endophytic fungi and 49 bacteria were isolated from root samples from 3 different commercial productions: an off-ground tomato production in a greenhouse, an organic production and a conventional production, both in a soil tunnel. Following morphological selection, 12 fungal and 33 bacterial isolates were genetically identified. Thirteen bacterial isolates belonging to nine potential PGPR species were then applied to tomato seedlings established in sterile substrate. The ability of these bacteria to produce indole acetic acid (IAA) and solubilize phosphate was also evaluated. They all were IAA producers and solubilized phosphate. The most interesting strains for growth promotion were found to be the isolates Pseudomonas palleroniana B10, Bacillus subtilis B25, Bacillus aryabhattai B29 and Pseudomonas fluorescens B17. The isolates P. fluorescens B17, B. aryabhattai B29, B. subtilis B18 and Pseudomonas moraviensis B6 also increased root growth. This study proposed a quick protocol for isolating and testing potential endophytic PGPR that should be characterized further for the direct and indirect mechanisms of growth promotion.
Abstract from the paper’s OpenAlex record; open copy licensed cc-by. Read at the source ↗
The text the model read, with the source record’s inline markup (italics, sub- and superscripts) rendered and its character entities decoded; quote offsets refer to the raw text.
Claims 9
Claim · model-written summary
Tomato roots yielded 67 endophytic fungi and 49 bacteria.
- Taxon
- tomato
Solanum lycopersicume0e1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“67 endophytic fungi and 49 bacteria were isolated from root samples”
e1“tomato production”
Claim · model-written summary
All tested bacterial isolates produced IAA and solubilized phosphate.
- Taxon
- tomatoSolanum lycopersicume0e1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“They all were IAA producers and solubilized phosphate”
e1“tomato seedlings”
Claim · model-written summary
Pseudomonas palleroniana B10 promoted tomato growth.
- Taxon
- tomatoSolanum lycopersicume0e1
- Interactor
- Pseudomonas palleroniana B10Pseudomonas palleronianae0e1symbiont
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The most interesting strains for growth promotion were found to be the isolates Pseudomonas palleroniana B10”
e1“tomato seedlings”
Claim · model-written summary
Bacillus subtilis B25 promoted tomato growth.
- Taxon
- tomatoSolanum lycopersicume0e1
- Interactor
- Bacillus subtilis B25
Bacillus subtilise0e1symbiont
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“growth promotion were found to be the isolates Pseudomonas palleroniana B10, Bacillus subtilis B25, Bacillus aryabhattai B29 and Pseudomonas fluorescens B17”
e1“tomato seedlings”
Claim · model-written summary
Bacillus aryabhattai B29 promoted tomato growth.
- Taxon
- tomatoSolanum lycopersicume0e1
- Interactor
- Bacillus aryabhattai B29Priestia aryabhattaie0e1symbiont
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“growth promotion were found to be the isolates Pseudomonas palleroniana B10, Bacillus subtilis B25, Bacillus aryabhattai B29 and Pseudomonas fluorescens B17”
e1“tomato seedlings”
Claim · model-written summary
Pseudomonas fluorescens B17 promoted tomato growth and increased root growth.
- Taxon
- tomatoSolanum lycopersicume0e1e2
- Interactor
- Pseudomonas fluorescens B17
.JPG?width=60)
Pseudomonas fluorescense0e1e2symbiont
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
.JPG?width=500)
Verbatim
e0“growth promotion were found to be the isolates Pseudomonas palleroniana B10, Bacillus subtilis B25, Bacillus aryabhattai B29 and Pseudomonas fluorescens B17”
e1“P. fluorescens B17, B. aryabhattai B29, B. subtilis B18 and Pseudomonas moraviensis B6 also increased root growth”
e2“tomato seedlings”
Claim · model-written summary
B. aryabhattai B29 increased tomato root growth.
- Taxon
- tomatoSolanum lycopersicume0e1
- Interactor
- B. aryabhattai B29Priestia aryabhattaie0e1symbiont
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“B. aryabhattai B29, B. subtilis B18 and Pseudomonas moraviensis B6 also increased root growth”
e1“tomato seedlings”
Claim · model-written summary
B. subtilis B18 increased tomato root growth.
- Taxon
- tomatoSolanum lycopersicume0e1
- Interactor
- B. subtilis B18Bacillus subtilise0e1symbiont
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“B. subtilis B18 and Pseudomonas moraviensis B6 also increased root growth”
e1“tomato seedlings”
Claim · model-written summary
Pseudomonas moraviensis B6 increased tomato root growth.
- Taxon
- tomatoSolanum lycopersicume0e1
- Interactor
- Pseudomonas moraviensis B6Pseudomonas moraviensise0e1symbiont
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Pseudomonas moraviensis B6 also increased root growth”
e1“tomato seedlings”
The same questions in other papers
Bacillus subtilis · growth · Solanum lycopersicum (tomato)Positive and negative results
30 papers in the same direction as this paper · 3 in the opposite direction
- no effect
- negative
- negative
30 papers more in this group
See all 34 papers →Pseudomonas fluorescens · growth · Solanum lycopersicum (tomato)Positive and negative results
33 papers in the same direction as this paper · 2 in the opposite direction
- positive
- no effect
- no effect
32 papers more in this group
See all 36 papers →Priestia aryabhattai · growth · Solanum lycopersicum (tomato)Results agree
2 papers in the same direction as this paper
- positive
- positive
Claims are grouped by organism, treatment and what was measured or targeted. A paper counts as positive when any of its claims in the group is positive.