Abstract
Plant growth-promoting microorganisms (PGPM) benefit plant health by enhancing plant nutrient-use efficiency and protecting plants against biotic and abiotic stresses. This study aimed to isolate and characterize autochthonous PGPM from important agri-food crops and nonagricultural plants to formulate biofertilizers. Native microorganisms were isolated and evaluated for PGP traits (K, P, and Zn solubilization, N2-fixation, NH3-, IAA and siderophore production, and antifungal activity against Fusarium oxysporum). Isolates were tested on radish and broccoli seedlings, evaluating 19 individual isolates and 12 microbial consortia. Potential bacteria were identified through DNA sequencing. In total, 798 bacteria and 209 fungi were isolated. Isolates showed higher mineral solubilization activity than other mechanisms; 399 bacteria and 156 fungi presented mineral solubilization. Bacteria were relevant for nitrogen fixation, siderophore, IAA (29–176 mg/L), and ammonia production, while fungi for Fusarium growth inhibition (40–69%). Twenty-four bacteria and eighteen fungi were selected for their PGP traits. Bacteria had significantly (ANOVA, p < 0.05) better effects on plants than fungi; treatments improved plant height (23.06–51.32%), leaf diameter (25.43–82.91%), and fresh weight (54.18–85.45%) in both crops. Most potential species belonged to Pseudomonas, Pantoea, Serratia, and Rahnella genera. This work validated a high-throughput approach to screening hundreds of rhizospheric microorganisms with PGP potential isolated from rhizospheric samples.
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Claims 15
Claim · model-written summary
798 bacteria were isolated from agri-food crops and nonagricultural plants.
Verbatim
e0“In total, 798 bacteria and 209 fungi were isolated”
Claim · model-written summary
209 fungi were isolated from agri-food crops and nonagricultural plants.
Verbatim
e0“In total, 798 bacteria and 209 fungi were isolated”
Claim · model-written summary
Isolates showed higher mineral solubilization activity than other plant-growth-promoting mechanisms.
Verbatim
e0“Isolates showed higher mineral solubilization activity than other mechanisms”
Claim · model-written summary
399 bacterial isolates presented mineral solubilization.
Verbatim
e0“399 bacteria and 156 fungi presented mineral solubilization”
Claim · model-written summary
156 fungal isolates presented mineral solubilization.
Verbatim
e0“399 bacteria and 156 fungi presented mineral solubilization”
Claim · model-written summary
Bacteria were relevant for nitrogen fixation, siderophore, IAA (29-176 mg/L) and ammonia production.
Verbatim
e0“Bacteria were relevant for nitrogen fixation, siderophore, IAA (29–176 mg/L), and ammonia production”
Claim · model-written summary
Fungi were relevant for Fusarium growth inhibition (40-69%).
FusariumOrganisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“fungi for Fusarium growth inhibition (40–69%)”
Claim · model-written summary
Twenty-four bacteria were selected for their PGP traits.
Verbatim
e0“Twenty-four bacteria and eighteen fungi were selected for their PGP traits”
Claim · model-written summary
Eighteen fungi were selected for their PGP traits.
Verbatim
e0“Twenty-four bacteria and eighteen fungi were selected for their PGP traits”
Claim · model-written summary
Bacterial isolates had significantly better effects on radish and broccoli plants than fungal isolates (ANOVA, p < 0.05).
- Taxon
- radish and broccoli
Raphanus sativus
Brassica oleracea var. italicae0 - Treatment
- Bacteriae1
- Outcome
- effects on plantse1
- Direction
- bettere1
- Comparator
- fungie1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Isolates were tested on radish and broccoli seedlings”
e1“Bacteria had significantly (ANOVA, p < 0.05) better effects on plants than fungi”
Claim · model-written summary
Microbial treatments improved plant height by 23.06-51.32% in radish and broccoli.
- Taxon
- radish and broccoliRaphanus sativusBrassica oleracea var. italicae0
- Treatment
- treatmentse1
- Outcome
- plant heighte1
- Direction
- improvede1
- Value
- 23.06–51.32%e1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Isolates were tested on radish and broccoli seedlings”
e1“treatments improved plant height (23.06–51.32%), leaf diameter (25.43–82.91%), and fresh weight (54.18–85.45%) in both crops”
Claim · model-written summary
Microbial treatments improved leaf diameter by 25.43-82.91% in radish and broccoli.
- Taxon
- radish and broccoliRaphanus sativusBrassica oleracea var. italicae0
- Treatment
- treatmentse1
- Outcome
- leaf diametere1
- Direction
- improvede1
- Value
- 25.43–82.91%e1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Isolates were tested on radish and broccoli seedlings”
e1“treatments improved plant height (23.06–51.32%), leaf diameter (25.43–82.91%), and fresh weight (54.18–85.45%) in both crops”
Claim · model-written summary
Microbial treatments improved fresh weight by 54.18-85.45% in radish and broccoli.
- Taxon
- radish and broccoliRaphanus sativusBrassica oleracea var. italicae0
- Treatment
- treatmentse1
- Outcome
- fresh weighte1
- Direction
- improvede1
- Value
- 54.18–85.45%e1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Isolates were tested on radish and broccoli seedlings”
e1“treatments improved plant height (23.06–51.32%), leaf diameter (25.43–82.91%), and fresh weight (54.18–85.45%) in both crops”
Claim · model-written summary
Most potential PGP species belonged to the genera Pseudomonas, Pantoea, Serratia and Rahnella.
Verbatim
e0“Most potential species belonged to Pseudomonas, Pantoea, Serratia, and Rahnella genera”
Claim · model-written summary
The work validated a high-throughput approach for screening hundreds of rhizospheric microorganisms with PGP potential.
Verbatim
e0“This work validated a high-throughput approach to screening hundreds of rhizospheric microorganisms with PGP potential”
The same questions in other papers
inoculation · Bacteria · Raphanus sativus (radish)Results agree
1 paper in the same direction as this paper
- 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.