Abstract
Plant growth-promoting rhizobacteria (PGPR) are microorganisms that promote plant health and play a critical role in sustainable agriculture. As a PGPR, Rhodopseudomonas palustris strain PS3, when applied as a microbial inoculant, exhibited beneficial effects on a variety of crops. In this study, we investigated the effects of PS3 on tomato growth, soil properties, and soil microbiota composition in an organic field. The results demonstrated that PS3 inoculation significantly improved the yield of marketable tomato fruit (37%) and the postharvest quality (e.g., sweetness, taste, vitamin C, total phenolic compounds, and lycopene). Additionally, soil nutrient availability (35–56%) and enzymatic activities (13–62%) also increased. We detected that approximately 10 7 CFU/g soil of R. palustris survived in the PS3-treated soil after harvest. Furthermore, several bacterial genera known to be associated with nutrient cycling (e.g., Dyella, Novosphingobium, Luteimonas, Haliangium, and Thermomonas ) had higher relative abundances (log2 fold change >2.0). To validate the results of the field experiment, we further conducted pot experiments with field-collected soil using two different tomato cultivars and obtained consistent results. Notably, the relative abundance of putative PGPRs in the genus Haliangium increased with PS3 inoculation in both cultivars (1.5 and 34.2%, respectively), suggesting that this genus may have synergistic interactions with PS3. Taken together, we further demonstrated the value of PS3 in sustainable agriculture and provided novel knowledge regarding the effects of this PGPR on soil microbiota composition.
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Claims 9
Claim · model-written summary
PS3 inoculation improved marketable tomato fruit yield by 37%.
- Taxon
- tomato
Solanum lycopersicumt0 - Treatment
- PS3 inoculatione0
- Interactor
- PS3e0symbiont
- Outcome
- yield of marketable tomato fruite0
- Direction
- improvede0
- Value
- 37%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“PS3 inoculation significantly improved the yield of marketable tomato fruit (37%)”
t0“tomato”
Claim · model-written summary
PS3 inoculation improved tomato fruit postharvest quality, including sweetness, taste, vitamin C, total phenolics, and lycopene.
- Taxon
- tomatoSolanum lycopersicumt0
- Treatment
- PS3 inoculatione0
- Interactor
- PS3e0symbiont
- Outcome
- postharvest qualitye0
- Direction
- improvede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“PS3 inoculation significantly improved the yield of marketable tomato fruit (37%) and the postharvest quality (e.g., sweetness, taste, vitamin C, total phenolic compounds, and lycopene)”
t0“tomato”
Claim · model-written summary
PS3 inoculation increased soil nutrient availability by 35–56%.
- Taxon
- tomatoSolanum lycopersicumt0
- Treatment
- PS3 inoculatione1
- Interactor
- PS3e1symbiont
- Outcome
- soil nutrient availabilitye0
- Direction
- increasede0
- Value
- 35–56%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“soil nutrient availability (35–56%) and enzymatic activities (13–62%) also increased”
e1“The results demonstrated that PS3 inoculation”
t0“tomato”
Claim · model-written summary
PS3 inoculation increased soil enzymatic activities by 13–62%.
- Taxon
- tomatoSolanum lycopersicumt0
- Treatment
- PS3 inoculatione1
- Interactor
- PS3e1symbiont
- Outcome
- enzymatic activitiese0
- Direction
- increasede0
- Value
- 13–62%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“soil nutrient availability (35–56%) and enzymatic activities (13–62%) also increased”
e1“The results demonstrated that PS3 inoculation”
t0“tomato”
Claim · model-written summary
Approximately 10 7 CFU/g soil of R. palustris survived in PS3-treated soil after harvest.
- Taxon
- tomatoSolanum lycopersicumt0
- Treatment
- PS3-treated soile0
- Interactor
- R. palustrisRhodopseudomonas palustrise0symbiont
- Outcome
- R. palustris survivede0
- Value
- 10 7 CFU/g soile0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“approximately 10 7 CFU/g soil of R. palustris survived in the PS3-treated soil after harvest”
t0“tomato”
Claim · model-written summary
Nutrient cycling bacterial genera had higher relative abundance after PS3 inoculation.
- Taxon
- tomatoSolanum lycopersicumt0
- Treatment
- PS3 inoculatione1
- Interactor
- Dyella, Novosphingobium, Luteimonas, Haliangium, and ThermomonasLuteimonasThermomonasHaliangiumNovosphingobiumDyellae0symbiont
- Outcome
- relative abundancese0
- Direction
- highere0
- Value
- log2 fold change >2.0e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“several bacterial genera known to be associated with nutrient cycling (e.g., Dyella, Novosphingobium, Luteimonas, Haliangium, and Thermomonas ) had higher relative abundances (log2 fold change >2.0)”
e1“The results demonstrated that PS3 inoculation”
t0“tomato”
Claim · model-written summary
Pot experiments with two tomato cultivars produced results consistent with the field experiment.
- Taxon
- tomatoSolanum lycopersicume0
- Material
- two different tomato cultivarse0
- Outcome
- consistent resultse0
- Setting
- pot experimentse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“pot experiments with field-collected soil using two different tomato cultivars and obtained consistent results”
Claim · model-written summary
PS3 inoculation increased putative Haliangium relative abundance in both tomato cultivars by 1.5% and 34.2%, respectively.
- Taxon
- tomatoSolanum lycopersicumt0
- Treatment
- PS3 inoculatione0
- Interactor
- HaliangiumHaliangiume0symbiont
- Outcome
- relative abundance of putative PGPRs in the genus Haliangiume0
- Direction
- increasede0
- Value
- 1.5 and 34.2%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“relative abundance of putative PGPRs in the genus Haliangium increased with PS3 inoculation in both cultivars (1.5 and 34.2%, respectively)”
t0“tomato”
Claim · model-written summary
The increase in Haliangium suggests possible synergistic interactions with PS3.
- Taxon
- tomatoSolanum lycopersicumt0
- Interactor
- HaliangiumHaliangiume1symbiont
- Second interactor
- PS3e0symbiont
- Outcome
- synergistic interactions with PS3e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“suggesting that this genus may have synergistic interactions with PS3”
e1“genus Haliangium increased with PS3 inoculation”
t0“tomato”
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