Abstract
The plant growth promotion characteristics of a heavy-metal-resistant strain of Bacillus edaphicus NBT was characterized. The strain was also evaluated for promoting plant growth and lead (Pb) uptake of Brassica juncea L. Czern (Indian mustard) in soil artificially contaminated with 0, 400, and 800 mg Pb.kg-1 soil. Atomic absorption spectrometer analysis demonstrated that strain NBT could release water-soluble Pb from lead carbonate in the solution. Strain NBT had the capacity to produce indole acetic acid, siderophores, and 1-aminocyclopropane-1-carboxylate deaminase. Low and high Pb treatments significantly decreased the growth of Indian mustard. Inoculation with strain NBT was found to increase root dry mass (ranging from 16% to 22%) and above-ground tissue dry mass (ranging from 24% to 30%) of Indian mustard in the Pb-amended soil. Strain NBT was able to mobilize Pb efficiently in plants in Pb-amended soil. In the soil treated with 400 and 800 mg Pb.kg-1 soil, the increase in Pb uptake varied from 18% to 46% in live bacterium-inoculated Indian mustard plants compared with dead bacterium-inoculated control. The strain was also able to colonize and develop in the rhizosphere soil of Indian mustard after root inoculation.
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Claims 7
Claim · model-written summary
Strain NBT could release water-soluble Pb from lead carbonate in solution.
- Taxon
- Bacillus edaphicus NBTPaenibacillus edaphicust0
- Outcome
- release water-soluble Pb from lead carbonatee1
Not reportedDirection
Verbatim
t0“Bacillus edaphicus NBT”
e1“strain NBT could release water-soluble Pb from lead carbonate in the solution”
Claim · model-written summary
Strain NBT could produce indole acetic acid, siderophores and 1-aminocyclopropane-1-carboxylate deaminase.
- Taxon
- Bacillus edaphicus NBTPaenibacillus edaphicust0
- Outcome
- produce indole acetic acid, siderophores, and 1-aminocyclopropane-1-carboxylate deaminasee1
Not reportedDirection
Verbatim
t0“Bacillus edaphicus NBT”
e1“Strain NBT had the capacity to produce indole acetic acid, siderophores, and 1-aminocyclopropane-1-carboxylate deaminase”
Claim · model-written summary
Low and high Pb treatments significantly decreased the growth of Indian mustard.
- Taxon
- Indian mustard
Brassica junceae1 - Treatment
- Low and high Pb treatmentse1
- Outcome
- growthe1
- Direction
- decreasede1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Low and high Pb treatments significantly decreased the growth of Indian mustard”
Claim · model-written summary
Inoculation with strain NBT increased root dry mass of Indian mustard by 16% to 22% in Pb-amended soil.
- Taxon
- Indian mustardBrassica junceae2
- Treatment
- Inoculation with strain NBTe1
- Interactor
- strain NBTe1other
- Outcome
- root dry masse1
- Direction
- increasee1
- Value
- 16% to 22%e1
- Setting
- Pb-amended soile2
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Inoculation with strain NBT was found to increase root dry mass (ranging from 16% to 22%)”
e2“Indian mustard in the Pb-amended soil”
Claim · model-written summary
Inoculation with strain NBT increased above-ground tissue dry mass of Indian mustard by 24% to 30% in Pb-amended soil.
- Taxon
- Indian mustardBrassica junceae1
- Treatment
- Inoculation with strain NBTe1
- Interactor
- strain NBTe1other
- Outcome
- above-ground tissue dry masse1
- Direction
- increasee1
- Value
- 24% to 30%e1
- Setting
- Pb-amended soile1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Inoculation with strain NBT was found to increase root dry mass (ranging from 16% to 22%) and above-ground tissue dry mass (ranging from 24% to 30%) of Indian mustard in the Pb-amended soil”
Claim · model-written summary
In soil with 400 and 800 mg Pb per kg, Pb uptake increased by 18% to 46% in Indian mustard inoculated with live bacterium compared with dead bacterium-inoculated control.
- Taxon
- Indian mustardBrassica junceae1
- Treatment
- live bacterium-inoculatede1
- Outcome
- Pb uptakee1
- Direction
- increasee1
- Value
- 18% to 46%e1
- Comparator
- dead bacterium-inoculated controle1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“the increase in Pb uptake varied from 18% to 46% in live bacterium-inoculated Indian mustard plants compared with dead bacterium-inoculated control”
Claim · model-written summary
The strain colonized and developed in the rhizosphere soil of Indian mustard after root inoculation.
- Taxon
- Indian mustardBrassica junceae1
- Outcome
- colonize and develop in the rhizosphere soile1
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“The strain was also able to colonize and develop in the rhizosphere soil of Indian mustard after root inoculation”
The same questions in other papers
lead atom · growth · Brassica juncea (Indian mustard)Results differ
10 papers in the same direction as this paper · 2 in the opposite direction
- negative
- positive
- positive
9 papers more in this group
See all 13 papers →inoculation · growth · Brassica juncea (Indian mustard)Positive and negative results
29 papers in the same direction as this paper · 1 in the opposite direction
- no effect
- positive
- positive
27 papers more in this group
See all 31 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.