Priestia megaterium 23 claims

species · family Bacillaceae · bacterium · NCBI Taxonomy ↗

Also written in claims: Bacillus megaterium · B. megaterium · B.megaterium — NCBI synonyms: Bacillus megaterium

5 spellings

Priestia megateriumOsmoregulator / Osmoregulator at English Wikipedia · CC BY-SA 3.0 · Wikimedia Commons ↗

23 claims

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Observationobservedoriginal resultmeasured

Claim · model-written summary

The maximum tolerable Pb concentration for the Bacillus megaterium isolate was 450 ppm.

Taxon: Bacillus megateriumPriestia megateriumt0
Outcome: maximum tolerable concentratione1
Value: 450 ppme1

Verbatim

t0
“Bacillus megaterium”
✓ located verbatim in the source · title, characters 28–47

e1
“The maximum tolerable concentration was determined to be 450 ppm”
✓ located verbatim in the source · abstract, characters 934–998

Title

Inoculation with endophytic Bacillus megaterium alleviates lead toxicity in cherry tomato

Inès Hammami; Nadiyah M. Alabdallah; Azzah Ibrahim Alghamdi; et al. Journal of the Saudi Society of Agricultural Sciences 2026. doi:10.1007/s44447-026-00161-9

Other claims from this paper (15)

Observation The isolate was confirmed as Bacillus megaterium with greater than 98% sequence similarity.
Observation The bacterium grew uninhibited at 50 ppm Pb(NO3)2.
Observation The bacterium showed partial growth suppression at Pb(NO3)2 concentrations of 100-250 ppm.
Observation The bacterium showed pronounced growth inhibition at 350-450 ppm Pb(NO3)2.
Observation The isolated strain exhibited multiple plant growth-promoting traits.
Intervention effect In uncontaminated soil, inoculated tomato plants had 6-24% greater shoot and root length and dry biomass than controls.
Intervention effect Under Pb-contaminated soil, inoculation significantly enhanced tomato shoot length by 23%.
Intervention effect Under Pb-contaminated soil, inoculation significantly enhanced tomato root length by 26%.
Intervention effect Under Pb-contaminated soil, inoculation significantly enhanced tomato shoot and root dry weight by 37%.
Intervention effect Inoculation increased tomato N uptake by 4.5% in uncontaminated soil.
Intervention effect Inoculation increased tomato P uptake by 25.3% in uncontaminated soil.
Intervention effect Inoculation increased tomato K uptake by 13.8% in uncontaminated soil.
Intervention effect Inoculation increased tomato N uptake by 37.9% under Pb stress.
Intervention effect Inoculation increased tomato P uptake by 3.6% under Pb stress.
Intervention effect Inoculation increased tomato K uptake by 26.7% under Pb stress.

Observationobservedoriginal resultmeasured

Claim · model-written summary

The isolate was confirmed as Bacillus megaterium with greater than 98% sequence similarity.

Taxon: Bacillus megateriumPriestia megateriumt0
Outcome: sequence similaritye1
Value: greater than 98%e1

Verbatim

t0
“Bacillus megaterium”
✓ located verbatim in the source · title, characters 28–47

e1
“displaying greater than 98% sequence similarity”
✓ located verbatim in the source · abstract, characters 678–725

Title

Inoculation with endophytic Bacillus megaterium alleviates lead toxicity in cherry tomato

Inès Hammami; Nadiyah M. Alabdallah; Azzah Ibrahim Alghamdi; et al. Journal of the Saudi Society of Agricultural Sciences 2026. doi:10.1007/s44447-026-00161-9

Other claims from this paper (15)

Observation The maximum tolerable Pb concentration for the Bacillus megaterium isolate was 450 ppm.
Observation The bacterium grew uninhibited at 50 ppm Pb(NO3)2.
Observation The bacterium showed partial growth suppression at Pb(NO3)2 concentrations of 100-250 ppm.
Observation The bacterium showed pronounced growth inhibition at 350-450 ppm Pb(NO3)2.
Observation The isolated strain exhibited multiple plant growth-promoting traits.
Intervention effect In uncontaminated soil, inoculated tomato plants had 6-24% greater shoot and root length and dry biomass than controls.
Intervention effect Under Pb-contaminated soil, inoculation significantly enhanced tomato shoot length by 23%.
Intervention effect Under Pb-contaminated soil, inoculation significantly enhanced tomato root length by 26%.
Intervention effect Under Pb-contaminated soil, inoculation significantly enhanced tomato shoot and root dry weight by 37%.
Intervention effect Inoculation increased tomato N uptake by 4.5% in uncontaminated soil.
Intervention effect Inoculation increased tomato P uptake by 25.3% in uncontaminated soil.
Intervention effect Inoculation increased tomato K uptake by 13.8% in uncontaminated soil.
Intervention effect Inoculation increased tomato N uptake by 37.9% under Pb stress.
Intervention effect Inoculation increased tomato P uptake by 3.6% under Pb stress.
Intervention effect Inoculation increased tomato K uptake by 26.7% under Pb stress.

Observationobservedoriginal resultmeasured

Claim · model-written summary

The bacterium grew uninhibited at 50 ppm Pb(NO3)2.

Taxon: Bacillus megateriumPriestia megateriumt0
Treatment: 50 ppm Pb(NO 3 ) 2e1
Outcome: uninhibited growthe1

Not reportedDirection

Verbatim

t0
“Bacillus megaterium”
✓ located verbatim in the source · title, characters 28–47

e1
“The bacterium exhibited uninhibited growth at 50 ppm Pb(NO 3 ) 2”
✓ located verbatim in the source · abstract, characters 749–813

Title

Inoculation with endophytic Bacillus megaterium alleviates lead toxicity in cherry tomato

Inès Hammami; Nadiyah M. Alabdallah; Azzah Ibrahim Alghamdi; et al. Journal of the Saudi Society of Agricultural Sciences 2026. doi:10.1007/s44447-026-00161-9

Other claims from this paper (15)

Observation The maximum tolerable Pb concentration for the Bacillus megaterium isolate was 450 ppm.
Observation The isolate was confirmed as Bacillus megaterium with greater than 98% sequence similarity.
Observation The bacterium showed partial growth suppression at Pb(NO3)2 concentrations of 100-250 ppm.
Observation The bacterium showed pronounced growth inhibition at 350-450 ppm Pb(NO3)2.
Observation The isolated strain exhibited multiple plant growth-promoting traits.
Intervention effect In uncontaminated soil, inoculated tomato plants had 6-24% greater shoot and root length and dry biomass than controls.
Intervention effect Under Pb-contaminated soil, inoculation significantly enhanced tomato shoot length by 23%.
Intervention effect Under Pb-contaminated soil, inoculation significantly enhanced tomato root length by 26%.
Intervention effect Under Pb-contaminated soil, inoculation significantly enhanced tomato shoot and root dry weight by 37%.
Intervention effect Inoculation increased tomato N uptake by 4.5% in uncontaminated soil.
Intervention effect Inoculation increased tomato P uptake by 25.3% in uncontaminated soil.
Intervention effect Inoculation increased tomato K uptake by 13.8% in uncontaminated soil.
Intervention effect Inoculation increased tomato N uptake by 37.9% under Pb stress.
Intervention effect Inoculation increased tomato P uptake by 3.6% under Pb stress.
Intervention effect Inoculation increased tomato K uptake by 26.7% under Pb stress.

Observationobservedoriginal resultmeasured

Claim · model-written summary

The bacterium showed partial growth suppression at Pb(NO3)2 concentrations of 100-250 ppm.

Taxon: Bacillus megateriumPriestia megateriumt0
Outcome: partial growth suppressione1
Value: 100–250 ppme1

Not reportedDirection

Verbatim

t0
“Bacillus megaterium”
✓ located verbatim in the source · title, characters 28–47

e1
“partial growth suppression at concentrations ranging from 100–250 ppm”
✓ located verbatim in the source · abstract, characters 816–885

Title

Inoculation with endophytic Bacillus megaterium alleviates lead toxicity in cherry tomato

Inès Hammami; Nadiyah M. Alabdallah; Azzah Ibrahim Alghamdi; et al. Journal of the Saudi Society of Agricultural Sciences 2026. doi:10.1007/s44447-026-00161-9

Other claims from this paper (15)

Observation The maximum tolerable Pb concentration for the Bacillus megaterium isolate was 450 ppm.
Observation The isolate was confirmed as Bacillus megaterium with greater than 98% sequence similarity.
Observation The bacterium grew uninhibited at 50 ppm Pb(NO3)2.
Observation The bacterium showed pronounced growth inhibition at 350-450 ppm Pb(NO3)2.
Observation The isolated strain exhibited multiple plant growth-promoting traits.
Intervention effect In uncontaminated soil, inoculated tomato plants had 6-24% greater shoot and root length and dry biomass than controls.
Intervention effect Under Pb-contaminated soil, inoculation significantly enhanced tomato shoot length by 23%.
Intervention effect Under Pb-contaminated soil, inoculation significantly enhanced tomato root length by 26%.
Intervention effect Under Pb-contaminated soil, inoculation significantly enhanced tomato shoot and root dry weight by 37%.
Intervention effect Inoculation increased tomato N uptake by 4.5% in uncontaminated soil.
Intervention effect Inoculation increased tomato P uptake by 25.3% in uncontaminated soil.
Intervention effect Inoculation increased tomato K uptake by 13.8% in uncontaminated soil.
Intervention effect Inoculation increased tomato N uptake by 37.9% under Pb stress.
Intervention effect Inoculation increased tomato P uptake by 3.6% under Pb stress.
Intervention effect Inoculation increased tomato K uptake by 26.7% under Pb stress.

Observationobservedoriginal resultmeasured

Claim · model-written summary

The bacterium showed pronounced growth inhibition at 350-450 ppm Pb(NO3)2.

Taxon: Bacillus megateriumPriestia megateriumt0
Outcome: pronounced inhibitione1
Value: 350–450 ppme1

Not reportedDirection

Verbatim

t0
“Bacillus megaterium”
✓ located verbatim in the source · title, characters 28–47

e1
“pronounced inhibition between 350–450 ppm”
✓ located verbatim in the source · abstract, characters 891–932

Title

Inoculation with endophytic Bacillus megaterium alleviates lead toxicity in cherry tomato

Inès Hammami; Nadiyah M. Alabdallah; Azzah Ibrahim Alghamdi; et al. Journal of the Saudi Society of Agricultural Sciences 2026. doi:10.1007/s44447-026-00161-9

Other claims from this paper (15)

Observation The maximum tolerable Pb concentration for the Bacillus megaterium isolate was 450 ppm.
Observation The isolate was confirmed as Bacillus megaterium with greater than 98% sequence similarity.
Observation The bacterium grew uninhibited at 50 ppm Pb(NO3)2.
Observation The bacterium showed partial growth suppression at Pb(NO3)2 concentrations of 100-250 ppm.
Observation The isolated strain exhibited multiple plant growth-promoting traits.
Intervention effect In uncontaminated soil, inoculated tomato plants had 6-24% greater shoot and root length and dry biomass than controls.
Intervention effect Under Pb-contaminated soil, inoculation significantly enhanced tomato shoot length by 23%.
Intervention effect Under Pb-contaminated soil, inoculation significantly enhanced tomato root length by 26%.
Intervention effect Under Pb-contaminated soil, inoculation significantly enhanced tomato shoot and root dry weight by 37%.
Intervention effect Inoculation increased tomato N uptake by 4.5% in uncontaminated soil.
Intervention effect Inoculation increased tomato P uptake by 25.3% in uncontaminated soil.
Intervention effect Inoculation increased tomato K uptake by 13.8% in uncontaminated soil.
Intervention effect Inoculation increased tomato N uptake by 37.9% under Pb stress.
Intervention effect Inoculation increased tomato P uptake by 3.6% under Pb stress.
Intervention effect Inoculation increased tomato K uptake by 26.7% under Pb stress.

Observationobservedoriginal resultmeasured

Claim · model-written summary

The isolated strain exhibited multiple plant growth-promoting traits.

Taxon: Bacillus megateriumPriestia megateriumt0
Outcome: multiple plant growth–promoting traitse1

Not reportedDirection

Verbatim

t0
“Bacillus megaterium”
✓ located verbatim in the source · title, characters 28–47

e1
“The strain exhibited multiple plant growth–promoting traits”
✓ located verbatim in the source · abstract, characters 1093–1152

Title

Inoculation with endophytic Bacillus megaterium alleviates lead toxicity in cherry tomato

Inès Hammami; Nadiyah M. Alabdallah; Azzah Ibrahim Alghamdi; et al. Journal of the Saudi Society of Agricultural Sciences 2026. doi:10.1007/s44447-026-00161-9

Other claims from this paper (15)

Observation The maximum tolerable Pb concentration for the Bacillus megaterium isolate was 450 ppm.
Observation The isolate was confirmed as Bacillus megaterium with greater than 98% sequence similarity.
Observation The bacterium grew uninhibited at 50 ppm Pb(NO3)2.
Observation The bacterium showed partial growth suppression at Pb(NO3)2 concentrations of 100-250 ppm.
Observation The bacterium showed pronounced growth inhibition at 350-450 ppm Pb(NO3)2.
Intervention effect In uncontaminated soil, inoculated tomato plants had 6-24% greater shoot and root length and dry biomass than controls.
Intervention effect Under Pb-contaminated soil, inoculation significantly enhanced tomato shoot length by 23%.
Intervention effect Under Pb-contaminated soil, inoculation significantly enhanced tomato root length by 26%.
Intervention effect Under Pb-contaminated soil, inoculation significantly enhanced tomato shoot and root dry weight by 37%.
Intervention effect Inoculation increased tomato N uptake by 4.5% in uncontaminated soil.
Intervention effect Inoculation increased tomato P uptake by 25.3% in uncontaminated soil.
Intervention effect Inoculation increased tomato K uptake by 13.8% in uncontaminated soil.
Intervention effect Inoculation increased tomato N uptake by 37.9% under Pb stress.
Intervention effect Inoculation increased tomato P uptake by 3.6% under Pb stress.
Intervention effect Inoculation increased tomato K uptake by 26.7% under Pb stress.

Observationobservedoriginal resultmeasured

Claim · model-written summary

Bacillus megaterium produced 75 identified compounds.

Taxon: Bacillus megateriumPriestia megateriume1
Outcome: compounds which are produced by the bacteriae0
Value: 75e0

Verbatim

e0
“Among the 75 compounds which are produced by the bacteria”
✓ located verbatim in the source · abstract, characters 629–686

e1
“Bacillus megaterium is particularly known for its abundance in soils and its plant growth promotion.”
✓ located verbatim in the source · abstract, characters 0–100

Title

Bacillus megaterium: Evaluation of Chemical Nature of Metabolites and Their Antioxidant and Agronomics Properties

Anna Hur; Mohamed Marouane Saoudi; Hicham Ferhout; et al. International Journal of Molecular Sciences 2024. doi:10.3390/ijms25063235

Other claims from this paper (7)

Observation Nineteen compounds were newly identified as B. megaterium metabolites.
Observation Twenty-three were first described as metabolites in Bacillus.
Intervention effect B. megaterium metabolite extracts inhibited soya seed germination relative to culture medium.
Intervention effect B. megaterium metabolite extracts inhibited sunflower seed germination relative to culture medium.
Intervention effect B. megaterium metabolite extracts inhibited ray grass seed germination relative to culture medium.
Observation The reported effect on corn seed germination is internally contradictory.
Mechanism Authors suggest B. megaterium metabolites can have diverse and opposing plant effects.

Observationobservedoriginal resultmeasured

Claim · model-written summary

Nineteen compounds were newly identified as B. megaterium metabolites.

Taxon: B. megateriumPriestia megateriume0
Outcome: identifications were for the first time found as metabolitese0
Value: 19e0

Verbatim

e0
“19 identifications were for the first time found as metabolites of B. megaterium”
✓ located verbatim in the source · abstract, characters 688–768

Title

Bacillus megaterium: Evaluation of Chemical Nature of Metabolites and Their Antioxidant and Agronomics Properties

Anna Hur; Mohamed Marouane Saoudi; Hicham Ferhout; et al. International Journal of Molecular Sciences 2024. doi:10.3390/ijms25063235

Other claims from this paper (7)

Observation Bacillus megaterium produced 75 identified compounds.
Observation Twenty-three were first described as metabolites in Bacillus.
Intervention effect B. megaterium metabolite extracts inhibited soya seed germination relative to culture medium.
Intervention effect B. megaterium metabolite extracts inhibited sunflower seed germination relative to culture medium.
Intervention effect B. megaterium metabolite extracts inhibited ray grass seed germination relative to culture medium.
Observation The reported effect on corn seed germination is internally contradictory.
Mechanism Authors suggest B. megaterium metabolites can have diverse and opposing plant effects.

Observationobservedoriginal resultmeasured

Claim · model-written summary

The bacterial strain contained growth-promotion-related genes consistent with its assay activities.

Taxon: Priestia megaterium HY-01Priestia megateriume1
Outcome: plant growth-promoting-related genese0

Verbatim

e0
“Genomic analyses also showed that the strain has plant growth-promoting-related genes that corroborate with the different PGP activities found in the assays.”
✓ located verbatim in the source · abstract, characters 612–769

e1
“we used the PGPR Priestia megaterium HY-01”
✓ located verbatim in the source · abstract, characters 371–413

Title

Growth Increase in the Herbaceous Plant Centella asiatica by the Plant Growth-Promoting Rhizobacteria Priestia megaterium HyangYak-01

HyungWoo Jo; Kyeongmo Lim; Jerald Conrad Ibal; et al. Plants 2023. doi:10.3390/plants12132398

Other claims from this paper (7)

Observation HY-01 exhibited IAA production, denitrification and phosphate solubilization in vitro.
Observation HY-01 exhibited urease activity in vitro.
Intervention effect Hyang-yak-01 treatment improved Centella leaf length, weight and width.
Intervention effect Hyang-yak-01 treatment improved Centella root length and width.
Intervention effect Hyang-yak-01 treatment improved Centella chlorophyll content.
Intervention effect The treated Centella rhizosphere had greater biodiversity than the control.
Intervention effect Treatment changed bacterial composition in the Centella rhizosphere relative to control.

Observationobservedoriginal resultmeasured

Claim · model-written summary

B. megaterium tested negative for ACC deaminase activity and nutrient solubilization.

Taxon: B. megateriumPriestia megateriume0
Outcome: negative for ACC deaminase activity and nutrient solubilizatione0

Verbatim

e0
“While B. megaterium was negative for ACC deaminase activity and nutrient solubilization, it exhibited auxin production.”
✓ located verbatim in the source · abstract, characters 1166–1285

Title

Role of Bacillus spp. Plant Growth Promoting Properties in Mitigating Biotic and Abiotic Stresses in Lowland Rice (Oryza sativa L.)

Tanja Weinand; Abbas El-Hasan; Folkard Asch Microorganisms 2023. doi:10.3390/microorganisms11092327

Other claims from this paper (8)

Intervention effect Both B. pumilus isolates inhibited fungal growth in vitro.
Intervention effect Both B. pumilus isolates reduced brown spot disease in two of three rice cultivars.
Observation Both B. pumilus isolates tested negative for all screened plant-growth-promoting traits.
Observation B. megaterium exhibited auxin production.
Intervention effect B. megaterium did not suppress brown spot disease in any of the three rice cultivars.
Observation Classical plant-growth-promoting properties are not necessarily required for bacteria to benefit plants.
Method / resource Common culture-based methods have limitations in effectively identifying beneficial bacteria.
Association Interactions between bacteria and plant cultivars determine beneficial effects of Bacillus under biotic or abiotic stresses.