Abstract
Abstract In semiarid regions is important to use native strains best adapted to these environments to optimize plant-PGPR interaction. We aimed to isolate and characterize PGPR from roots and rhizosphere of a tomato crop, as well as studying the effect of its inoculation on tomato seedlings growth. We selected four strains considering their effectiveness of fixing nitrogen, solubilizing phosphate, producing siderophores and indole acetic acid. They belong to the genera Enterobacter , Pseudomonas , Cellulosimicrobium, and Ochrobactrum . In addition, we also analyzed the ability to solubilize Ca 3 (PO 4 ) 2 , FePO 4 and AlPO 4 and the presence of one of the genes encoding the cofactor PQQ in their genome. Enterobacter 64S1 and Pseudomonas 42P4 showed the highest phosphorus solubilizing activity and presence of pqq E gene. Furthermore, in a tomato-based bioassay in speed-bed demonstrated that a sole inoculation at seedling stage with the strains increased dry weight of roots (49–88%) and shoots (39–55%), stem height (8–13%) and diameter (5–8%) and leaf area (22–31%) and were equal or even higher than fertilization treatment. Leaf nitrogen and chlorophyll levels were also increased (50–80% and 26–33%) compared to control. These results suggest that Enterobacter 64S1 and Pseudomonas 42P4 can be used as bio-inoculant in order to realize a nutrient integrated management.
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Claims 9
Claim · model-written summary
Enterobacter 64S1 and Pseudomonas 42P4 had the highest phosphorus solubilizing activity and carried pqq E.
- Gene
- pqq E genee0
- Outcome
- phosphorus solubilizing activity and presence of pqq E genee0
- Direction
- higheste0
Not reportedTaxon
Verbatim
e0“Enterobacter 64S1 and Pseudomonas 42P4 showed the highest phosphorus solubilizing activity and presence of pqq E gene”
Claim · model-written summary
Inoculation increased tomato seedling root dry weight by 49–88%.
- Taxon
- Solanum lycopersicum L.
Solanum lycopersicumt0 - Treatment
- a sole inoculation at seedling stage with the strainse0
- Outcome
- dry weight of rootse0
- Direction
- increasede0
- Value
- 49–88%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Solanum lycopersicum L.”
e0“a sole inoculation at seedling stage with the strains increased dry weight of roots (49–88%) and shoots (39–55%)”
Claim · model-written summary
Inoculation increased tomato seedling shoot dry weight by 39–55%.
- Taxon
- Solanum lycopersicum L.Solanum lycopersicumt0
- Treatment
- a sole inoculation at seedling stage with the strainse0
- Outcome
- shootse0
- Direction
- increasede0
- Value
- 39–55%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Solanum lycopersicum L.”
e0“a sole inoculation at seedling stage with the strains increased dry weight of roots (49–88%) and shoots (39–55%)”
Claim · model-written summary
Inoculation increased tomato seedling stem height by 8–13%.
Not reportedTaxonTreatmentComparator
Verbatim
e0“stem height (8–13%) and diameter (5–8%) and leaf area (22–31%)”
Claim · model-written summary
Inoculation increased tomato seedling stem diameter by 5–8%.
Not reportedTaxonTreatmentComparator
Verbatim
e0“stem height (8–13%) and diameter (5–8%) and leaf area (22–31%)”
Claim · model-written summary
Inoculation increased tomato seedling leaf area by 22–31%.
Not reportedTaxonTreatment
Verbatim
e0“leaf area (22–31%) and were equal or even higher than fertilization treatment”
Claim · model-written summary
Inoculation increased leaf nitrogen by 50–80% relative to control.
Not reportedTaxonTreatment
Verbatim
e0“Leaf nitrogen and chlorophyll levels were also increased (50–80% and 26–33%) compared to control”
Claim · model-written summary
Inoculation increased chlorophyll by 26–33% relative to control.
Not reportedTaxonTreatment
Verbatim
e0“Leaf nitrogen and chlorophyll levels were also increased (50–80% and 26–33%) compared to control”
Claim · model-written summary
The authors propose Enterobacter 64S1 and Pseudomonas 42P4 as bio-inoculants for integrated nutrient management.
- Outcome
- bio-inoculant in order to realize a nutrient integrated managemente0
Not reportedTaxon
Verbatim
e0“Enterobacter 64S1 and Pseudomonas 42P4 can be used as bio-inoculant in order to realize a nutrient integrated management”
The same questions in other papers
inoculation · growth · Solanum lycopersicum (tomato)Positive and negative results
386 papers in the same direction as this paper · 53 in the opposite direction · 1 reporting no difference from an alternative
- no effect
- positive
- positive
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See all 441 papers →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.