Abstract
Interactions were studied between oat ( Avena sativa ) and two bacterial species, Bacillus subtilis and Pantoea agglomerans , in soils contaminated with heavy metals (HM), cadmium (50 mg/kg), and lead (200 mg/kg). Exposure to HM resulted in decreased (by 30–50%) length, mass, and ratio of shoot to root dimensions. Inoculation with bacteria lead to restoration and further enhancement of plant productivity, raising it above the level achieved via inoculation of oat in uncontaminated soils. It also reduced HM accumulation by plants. Pure cultures of P. agglomerans accumulate HM more intensively than those of B. subtilis (adsorbing activity was studied for both cells and extracellular metabolites). After the introduction of bacteria, lead, and cadmium content in soil decreased four- to fivefold and two- to threefold, respectively. Protection from HM is attributable to reorganizations in the populations of root-associated bacteria: cell number increases in the rhizoplane while decreasing in the rhizosphere.
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Claims 7
Claim · model-written summary
Heavy metals decreased oat shoot and root dimensions and mass by 30–50%.
- Taxon
- oat
Avena sativat0 - Treatment
- HMe0
- Outcome
- length, mass, and ratio of shoot to root dimensionse0
- Direction
- decreasede0
- Value
- 30–50%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Exposure to HM resulted in decreased (by 30–50%) length, mass, and ratio of shoot to root dimensions.”
t0“between oat ( Avena sativa ) and two bacterial species”
Claim · model-written summary
Bacterial inoculation restored and enhanced oat productivity above that in inoculated uncontaminated soil.
- Taxon
- oatAvena sativae0
- Treatment
- Inoculation with bacteriae0
- Outcome
- plant productivitye0
- Direction
- enhancemente0
- Comparator
- inoculation of oat in uncontaminated soilse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Inoculation with bacteria lead to restoration and further enhancement of plant productivity, raising it above the level achieved via inoculation of oat in uncontaminated soils.”
Claim · model-written summary
Bacterial inoculation reduced heavy-metal accumulation by oat plants.
- Taxon
- oatAvena sativat0
- Treatment
- Inoculation with bacteriat1
- Outcome
- HM accumulation by plantse0
- Direction
- reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“It also reduced HM accumulation by plants.”
t0“between oat ( Avena sativa ) and two bacterial species”
t1“Inoculation with bacteria”
Claim · model-written summary
P. agglomerans cultures accumulated heavy metals more intensely than B. subtilis cultures.
- Taxon
- oatAvena sativat0
- Interactor
- P. agglomerans
Pantoea agglomeranse0symbiont - Second interactor
- B. subtilis
Bacillus subtilise0symbiont - Outcome
- P. agglomerans accumulate HMe0
- Direction
- more intensivelye0
- Comparator
- B. subtilise0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Pure cultures of P. agglomerans accumulate HM more intensively than those of B. subtilis”
t0“between oat ( Avena sativa ) and two bacterial species”
Claim · model-written summary
Introducing bacteria decreased soil lead content four- to fivefold.
- Taxon
- oatAvena sativat0
- Treatment
- introduction of bacteriae0
- Outcome
- leade0
- Direction
- decreasede0
- Value
- four- to fivefolde0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“After the introduction of bacteria, lead, and cadmium content in soil decreased four- to fivefold and two- to threefold, respectively.”
t0“between oat ( Avena sativa ) and two bacterial species”
Claim · model-written summary
Introducing bacteria decreased soil cadmium content two- to threefold.
- Taxon
- oatAvena sativat0
- Treatment
- introduction of bacteriae0
- Outcome
- cadmium content in soile0
- Direction
- decreasede0
- Value
- two- to threefolde0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“After the introduction of bacteria, lead, and cadmium content in soil decreased four- to fivefold and two- to threefold, respectively.”
t0“between oat ( Avena sativa ) and two bacterial species”
Claim · model-written summary
Root-associated bacterial numbers increased in the rhizoplane and decreased in the rhizosphere.
- Taxon
- oatAvena sativat0
- Outcome
- cell numbere0
- Direction
- increases in the rhizoplane while decreasing in the rhizospheree0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“cell number increases in the rhizoplane while decreasing in the rhizosphere”
t0“between oat ( Avena sativa ) and two bacterial species”
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See all 35 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.