Abstract
Introduction: Food crops are increasingly susceptible to the challenging impacts of climate change, encompassing both abiotic and biotic stresses, that cause yield losses. Root-associated microorganisms, including plant growth-promoting bacteria (PGPB), can improve plant growth as well as plant tolerance to environmental stresses. The aims of this work were to characterize bacteria isolated from soil and roots of tomato plants grown in open field. Methods: Biochemical and molecular analyses were used to evaluate the PGP potential of the considered strains on tomato plants in controlled conditions, also assessing their effects under a water deficit condition. The isolated strains were classified by 16S gene sequencing and exhibited typical features of PGPB, such as the release of siderophores, the production of proteases, and phosphorous solubilization. Inoculating tomato plants with eleven selected strains led to the identification of potentially interesting strains that increased shoot height and dry weight. Three strains were then selected for the experiment under water deficit in controlled conditions. The tomato plants were monitored from biometric and physiological point of view, and the effect of inoculation at molecular level was verified with a targeted RT-qPCR based approach on genes that play a role under water deficit condition. Results: Results revealed the PGP potential of different bacterial isolates in tomato plants, both in well-watered and stressed conditions. The used integrated approach allowed to obtain a broader picture of the plant status, from biometric, eco-physiological and molecular point of view. Gene expression analysis showed a different regulation of genes involved in pathways related to abscisic acid, osmoprotectant compounds and heat shock proteins, depending on the treatments. Discussion: Overall, results showed significant changes in tomato plants due to the bacterial inoculation, also under water deficit, that hold promise for future field applications of these bacterial strains, suggesting that a synergistic and complementary interaction between diverse PGPB is an important point to be considered for their exploitation.
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Claims 6
Claim · model-written summary
Selected bacterial strains increased tomato shoot height.
- Taxon
- tomato
Solanum lycopersicume0 - Treatment
- Inoculating tomato plants with eleven selected strainse0
- Interactor
- selected strainse0symbiont
- Outcome
- shoot heighte0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Inoculating tomato plants with eleven selected strains led to the identification of potentially interesting strains that increased shoot height and dry weight.”
Claim · model-written summary
Selected bacterial strains increased tomato dry weight.
- Taxon
- tomatoSolanum lycopersicume0
- Treatment
- Inoculating tomato plants with eleven selected strainse0
- Interactor
- selected strainse0symbiont
- Outcome
- dry weighte0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Inoculating tomato plants with eleven selected strains led to the identification of potentially interesting strains that increased shoot height and dry weight.”
Claim · model-written summary
Bacterial inoculation changed regulation of genes in abscisic acid pathways depending on treatment.
- Taxon
- tomatoSolanum lycopersicume1
- Treatment
- bacterial inoculatione1
- Compound
- abscisic acide0
- Outcome
- regulation of genes involved in pathways related to abscisic acide0
- Direction
- differente0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Gene expression analysis showed a different regulation of genes involved in pathways related to abscisic acid, osmoprotectant compounds and heat shock proteins, depending on the treatments.”
e1“tomato plants due to the bacterial inoculation”
Claim · model-written summary
Bacterial inoculation changed regulation of genes in osmoprotectant compound pathways depending on treatment.
- Taxon
- tomatoSolanum lycopersicume1
- Treatment
- bacterial inoculatione1
- Outcome
- regulation of genes involved in pathways related to abscisic acid, osmoprotectant compounds and heat shock proteinse0
- Direction
- differente0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Gene expression analysis showed a different regulation of genes involved in pathways related to abscisic acid, osmoprotectant compounds and heat shock proteins, depending on the treatments.”
e1“tomato plants due to the bacterial inoculation”
Claim · model-written summary
Bacterial inoculation changed regulation of genes in heat shock protein pathways depending on treatment.
- Taxon
- tomatoSolanum lycopersicume1
- Treatment
- bacterial inoculatione1
- Outcome
- heat shock proteinse0
- Direction
- differente0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Gene expression analysis showed a different regulation of genes involved in pathways related to abscisic acid, osmoprotectant compounds and heat shock proteins, depending on the treatments.”
e1“tomato plants due to the bacterial inoculation”
Claim · model-written summary
Bacterial inoculation caused significant changes in tomato even under water deficit.
- Taxon
- tomatoSolanum lycopersicume0
- Treatment
- bacterial inoculatione0
- Outcome
- changes in tomato plantse0
- Qualifier
- under water deficite0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“results showed significant changes in tomato plants due to the bacterial inoculation, also under water deficit”
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
- positive
- positive
- positive
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