Paper · 2026 · BMC Plant Biology

Harnessing phyllosphere and rhizobium bacteria for salt stress alleviation in common bean (Phaseolus vulgaris)

Safoura Ansari; Seyed Abdolreza Kazemeini; Mozhgan Alinia; et al.

11
claims
22
verbatim quotes
0
citations
3
research areas
✓
Open access · cc-by-nc-nd

Abstract

Salinity is a major constraint to common bean (Phaseolus vulgaris) productivity, yet sustainable mitigation strategies remain limited. Here, we evaluated the interactive effects of salinity stress (0–8 dS m− 1), and plant growth-promoting bacteria inoculations, including Phyllosphere strains (P1 and P2), and Rhizobium (RB), and their combinations (P1 + RB, P2 + RB) on two common bean cultivars (Almas and Pak). Salinity significantly reduced plant height, chlorophyll pigments (Chl a and Chl b), chlorophyll fluorescence (Fv/Fm) and biomass, while elevating oxidative stress markers [malondialdehyde (MDA), hydrogen peroxide (H2O2)] and antioxidant enzyme activity (SOD, CAT). Bacterial treatments, particularly P1 + RB treatment alleviated salinity-induced damage by reducing oxidative stress (up to 68.4%), enhancing ion homeostasis (lower Na⁺, higher K⁺ and Ca²⁺), and maintaining photosynthetic efficiency (Fv/Fm). Almas exhibited greater tolerance than Pak, with lower MDA levels (21.7–25% reduction) and higher phenolic accumulation under stress. Together, these findings highlight the synergistic role of bacterial inoculants and cultivar selection in enhancing salinity tolerance, offering a promising strategy for improving legume resilience and productivity in saline agroecosystems.

Abstract from the paper’s OpenAlex record; open copy licensed cc-by-nc-nd. Read at the source ↗

The text the model read, with the source record’s inline markup (italics, sub- and superscripts) rendered and its character entities decoded; quote offsets refer to the raw text.

Claims 11

Intervention effectobservedoriginal resultnegativesignificant (as stated)measured

Claim · model-written summary

Salinity reduced plant height and chlorophyll pigments of common bean.

Taxon
common beanPhaseolus vulgarist0
Treatment
Salinitye1
Outcome
plant height, chlorophyll pigments (Chl a and Chl b)e1
Direction
reducede1

Not reportedComparator

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Phaseolus vulgaris
Phaseolus vulgaris · TaxonRasbak · CC BY-SA 3.0 · Wikimedia Commons ↗

Verbatim

e1

“Salinity significantly reduced plant height, chlorophyll pigments (Chl a and Chl b), chlorophyll fluorescence (Fv/Fm) and biomass, while elevating oxidative stress markers [malondialdehyde (MDA), hydrogen peroxide (H2O2)] and antioxidant enzyme activity (SOD, CAT)”

✓ located verbatim in the source · abstract, characters 414–678 · show in text ↑
t0

“common bean (Phaseolus vulgaris)”

✓ located verbatim in the source · title, characters 78–110 · show in text ↑
Intervention effectobservedoriginal resultnegativesignificant (as stated)measured

Claim · model-written summary

Salinity reduced chlorophyll fluorescence (Fv/Fm) and biomass of common bean.

Taxon
common beanPhaseolus vulgarist0
Treatment
Salinitye1
Outcome
chlorophyll fluorescence (Fv/Fm) and biomasse1
Direction
reducede1

Not reportedComparator

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Phaseolus vulgaris
Phaseolus vulgaris · TaxonRasbak · CC BY-SA 3.0 · Wikimedia Commons ↗

Verbatim

e1

“Salinity significantly reduced plant height, chlorophyll pigments (Chl a and Chl b), chlorophyll fluorescence (Fv/Fm) and biomass, while elevating oxidative stress markers [malondialdehyde (MDA), hydrogen peroxide (H2O2)] and antioxidant enzyme activity (SOD, CAT)”

✓ located verbatim in the source · abstract, characters 414–678 · show in text ↑
t0

“common bean (Phaseolus vulgaris)”

✓ located verbatim in the source · title, characters 78–110 · show in text ↑
Intervention effectobservedoriginal resultnegativemeasured

Claim · model-written summary

Salinity elevated oxidative stress markers in common bean.

Taxon
common beanPhaseolus vulgarist0
Treatment
Salinitye1
Outcome
oxidative stress markerse1
Direction
elevatinge1
Qualifier
malondialdehyde (MDA), hydrogen peroxide (H2O2)e1

Not reportedComparator

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Phaseolus vulgaris
Phaseolus vulgaris · TaxonRasbak · CC BY-SA 3.0 · Wikimedia Commons ↗

Verbatim

e1

“Salinity significantly reduced plant height, chlorophyll pigments (Chl a and Chl b), chlorophyll fluorescence (Fv/Fm) and biomass, while elevating oxidative stress markers [malondialdehyde (MDA), hydrogen peroxide (H2O2)] and antioxidant enzyme activity (SOD, CAT)”

✓ located verbatim in the source · abstract, characters 414–678 · show in text ↑
t0

“common bean (Phaseolus vulgaris)”

✓ located verbatim in the source · title, characters 78–110 · show in text ↑
Intervention effectobservedoriginal resultnegativemeasured

Claim · model-written summary

Salinity elevated antioxidant enzyme activity in common bean.

Taxon
common beanPhaseolus vulgarist0
Treatment
Salinitye1
Outcome
antioxidant enzyme activitye1
Direction
elevatinge1
Qualifier
SOD, CATe1

Not reportedComparator

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Phaseolus vulgaris
Phaseolus vulgaris · TaxonRasbak · CC BY-SA 3.0 · Wikimedia Commons ↗

Verbatim

e1

“Salinity significantly reduced plant height, chlorophyll pigments (Chl a and Chl b), chlorophyll fluorescence (Fv/Fm) and biomass, while elevating oxidative stress markers [malondialdehyde (MDA), hydrogen peroxide (H2O2)] and antioxidant enzyme activity (SOD, CAT)”

✓ located verbatim in the source · abstract, characters 414–678 · show in text ↑
t0

“common bean (Phaseolus vulgaris)”

✓ located verbatim in the source · title, characters 78–110 · show in text ↑
Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

The P1 + RB bacterial treatment reduced salinity-induced oxidative stress in common bean.

Taxon
common beanPhaseolus vulgarist0
Treatment
P1 + RB treatmente2
Interactor
P1e2symbiont
Second interactor
RBe2symbiont
Outcome
oxidative stresse2
Direction
reducinge2
Value
68.4%e2

Not reportedComparator

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Phaseolus vulgaris
Phaseolus vulgaris · TaxonRasbak · CC BY-SA 3.0 · Wikimedia Commons ↗

Verbatim

e2

“Bacterial treatments, particularly P1 + RB treatment alleviated salinity-induced damage by reducing oxidative stress (up to 68.4%), enhancing ion homeostasis (lower Na⁺, higher K⁺ and Ca²⁺), and maintaining photosynthetic efficiency (Fv/Fm)”

✓ located verbatim in the source · abstract, characters 680–920 · show in text ↑
t0

“common bean (Phaseolus vulgaris)”

✓ located verbatim in the source · title, characters 78–110 · show in text ↑
Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

The P1 + RB bacterial treatment lowered sodium (Na⁺) in common bean under salinity.

Taxon
common beanPhaseolus vulgarist0
Treatment
P1 + RB treatmente2
Interactor
P1e2symbiont
Second interactor
RBe2symbiont
Outcome
Na⁺e2
Direction
lowere2

Not reportedComparator

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Phaseolus vulgaris
Phaseolus vulgaris · TaxonRasbak · CC BY-SA 3.0 · Wikimedia Commons ↗

Verbatim

e2

“Bacterial treatments, particularly P1 + RB treatment alleviated salinity-induced damage by reducing oxidative stress (up to 68.4%), enhancing ion homeostasis (lower Na⁺, higher K⁺ and Ca²⁺), and maintaining photosynthetic efficiency (Fv/Fm)”

✓ located verbatim in the source · abstract, characters 680–920 · show in text ↑
t0

“common bean (Phaseolus vulgaris)”

✓ located verbatim in the source · title, characters 78–110 · show in text ↑
Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

The P1 + RB bacterial treatment raised potassium and calcium (K⁺ and Ca²⁺) in common bean under salinity.

Taxon
common beanPhaseolus vulgarist0
Treatment
P1 + RB treatmente2
Interactor
P1e2symbiont
Second interactor
RBe2symbiont
Outcome
K⁺ and Ca²⁺e2
Direction
highere2

Not reportedComparator

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Phaseolus vulgaris
Phaseolus vulgaris · TaxonRasbak · CC BY-SA 3.0 · Wikimedia Commons ↗

Verbatim

e2

“Bacterial treatments, particularly P1 + RB treatment alleviated salinity-induced damage by reducing oxidative stress (up to 68.4%), enhancing ion homeostasis (lower Na⁺, higher K⁺ and Ca²⁺), and maintaining photosynthetic efficiency (Fv/Fm)”

✓ located verbatim in the source · abstract, characters 680–920 · show in text ↑
t0

“common bean (Phaseolus vulgaris)”

✓ located verbatim in the source · title, characters 78–110 · show in text ↑
Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

The P1 + RB bacterial treatment maintained photosynthetic efficiency (Fv/Fm) of common bean under salinity.

Taxon
common beanPhaseolus vulgarist0
Treatment
P1 + RB treatmente2
Interactor
P1e2symbiont
Second interactor
RBe2symbiont
Outcome
photosynthetic efficiency (Fv/Fm)e2
Direction
maintaininge2

Not reportedComparator

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Phaseolus vulgaris
Phaseolus vulgaris · TaxonRasbak · CC BY-SA 3.0 · Wikimedia Commons ↗

Verbatim

e2

“Bacterial treatments, particularly P1 + RB treatment alleviated salinity-induced damage by reducing oxidative stress (up to 68.4%), enhancing ion homeostasis (lower Na⁺, higher K⁺ and Ca²⁺), and maintaining photosynthetic efficiency (Fv/Fm)”

✓ located verbatim in the source · abstract, characters 680–920 · show in text ↑
t0

“common bean (Phaseolus vulgaris)”

✓ located verbatim in the source · title, characters 78–110 · show in text ↑
Associationobservedoriginal resultpositivemeasured

Claim · model-written summary

Almas showed greater salinity tolerance than Pak.

Taxon
common beanPhaseolus vulgarist0
Material
Almase3
Outcome
tolerancee3
Direction
greatere3
Comparator
Pake3

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Phaseolus vulgaris
Phaseolus vulgaris · TaxonRasbak · CC BY-SA 3.0 · Wikimedia Commons ↗

Verbatim

e3

“Almas exhibited greater tolerance than Pak, with lower MDA levels (21.7–25% reduction) and higher phenolic accumulation under stress”

✓ located verbatim in the source · abstract, characters 922–1054 · show in text ↑
t0

“common bean (Phaseolus vulgaris)”

✓ located verbatim in the source · title, characters 78–110 · show in text ↑
Associationobservedoriginal resultpositivemeasured

Claim · model-written summary

Almas had lower MDA levels than Pak under salinity.

Taxon
common beanPhaseolus vulgarist0
Material
Almase3
Outcome
MDA levelse3
Direction
lowere3
Value
21.7–25%e3
Comparator
Pake3

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Phaseolus vulgaris
Phaseolus vulgaris · TaxonRasbak · CC BY-SA 3.0 · Wikimedia Commons ↗

Verbatim

e3

“Almas exhibited greater tolerance than Pak, with lower MDA levels (21.7–25% reduction) and higher phenolic accumulation under stress”

✓ located verbatim in the source · abstract, characters 922–1054 · show in text ↑
t0

“common bean (Phaseolus vulgaris)”

✓ located verbatim in the source · title, characters 78–110 · show in text ↑
Associationobservedoriginal resultpositivemeasured

Claim · model-written summary

Almas had higher phenolic accumulation than Pak under stress.

Taxon
common beanPhaseolus vulgarist0
Material
Almase3
Outcome
phenolic accumulatione3
Direction
highere3
Qualifier
under stresse3
Comparator
Pake3

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Phaseolus vulgaris
Phaseolus vulgaris · TaxonRasbak · CC BY-SA 3.0 · Wikimedia Commons ↗

Verbatim

e3

“Almas exhibited greater tolerance than Pak, with lower MDA levels (21.7–25% reduction) and higher phenolic accumulation under stress”

✓ located verbatim in the source · abstract, characters 922–1054 · show in text ↑
t0

“common bean (Phaseolus vulgaris)”

✓ located verbatim in the source · title, characters 78–110 · show in text ↑

Rhizobium · nutrient: content · Phaseolus vulgaris (common bean)Results agree

6 papers: 6 positive, 0 negative or no effect

5 papers in the same direction as this paper

  1. positive
  2. positive
  3. positive

2 papers more in this group

See all 6 papers →

salinity · physiology: pigments · Phaseolus vulgaris (common bean)Results differ

22 papers: 3 positive, 19 negative or no effect

18 papers in the same direction as this paper · 3 in the opposite direction

  1. positive
  2. positive
  3. positive

18 papers more in this group

See all 22 papers →

salinity · physiology: oxidative · Phaseolus vulgaris (common bean)Positive and negative results

25 papers: 1 positive, 24 negative or no effect

23 papers in the same direction as this paper · 1 in the opposite direction

  1. positive
  2. negative
  3. negative

21 papers more in this group

See all 25 papers →

salinity · soil: biology · Phaseolus vulgaris (common bean)Results agree

4 papers: 0 positive, 4 negative or no effect

3 papers in the same direction as this paper

  1. negative
  2. negative
  3. negative
See all 4 papers →

salinity · physiology: photosynthesis · Phaseolus vulgaris (common bean)Results agree

23 papers: 0 positive, 23 negative or no effect

22 papers in the same direction as this paper

  1. negative
  2. negative
  3. negative

19 papers more in this group

See all 23 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.