Abstract
Cadmium and lead tolerant plant growth promoting rhizobacteria can be an eco-friendly option for reclamation of metal-contaminated soil and mitigation of heavy metal stress for phytostimulation to develop sustainable agriculture. Novel heavy metal tolerant PGPR strain isolation is prerequisite in practical scale. The present study was to isolate, characterize and identify cadmium and lead tolerant PGPR strains. Some potent multi heavy metal tolerant PGPRs were isolated from rhizospheric soil contaminated with industrial, sewage or agrochemical waste and two most promising strains were identified as Lysinibacillus varians strain KUBM17 and Pseudomonas putida strain KUBM18 on the basis of 16S rDNA sequencing. These two strains were exhibiting a high degree of Cd and Pb tolerant ability with bioaccumulatory properties to remove Cd and Pb from the medium which was evidenced by AAS study. Furthermore, L. varians strain KUBM17 and P. putida strain KUBM18 showed very promising PGP traits such as ammonia production, IAA production (20–22 µg/ml), Nitrogen fixation, phosphate solubilization (55–515 ppm) and siderophore production (14–40 nmole) capability together with biocontrol properties with survival ability under different agro-climatic conditions. These PGPR isolates improved the early radish plant growth under cadmium and lead stress condition. So, KUBM 17 and KUBM 18 might be concerned as PGPR-biofertilizer in heavy metal-contaminated agricultural soil.
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Claims 7
Claim · model-written summary
KUBM17 and KUBM18 were identified as Lysinibacillus varians and Pseudomonas putida.
- Taxon
- radish
Raphanus sativuse1 - Interactor
- Lysinibacillus varians strain KUBM17Lysinibacillus varianse0symbiont
- Second interactor
- Pseudomonas putida strain KUBM18
Pseudomonas putidae0symbiont - Outcome
- identified as Lysinibacillus varians strain KUBM17 and Pseudomonas putida strain KUBM18e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“two most promising strains were identified as Lysinibacillus varians strain KUBM17 and Pseudomonas putida strain KUBM18 on the basis of 16S rDNA sequencing”
e1“early radish plant growth”
Claim · model-written summary
The isolates showed ammonia production, nitrogen fixation, and biocontrol properties.
- Taxon
- radishRaphanus sativuse2
- Interactor
- L. varians strain KUBM17Lysinibacillus varianse1symbionte0
- Outcome
- ammonia productione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“ammonia production, IAA production (20–22 µg/ml), Nitrogen fixation, phosphate solubilization (55–515 ppm) and siderophore production (14–40 nmole) capability together with biocontrol properties”
e1“L. varians strain KUBM17 and P. putida strain KUBM18 showed very promising PGP traits”
e2“early radish plant growth”
Claim · model-written summary
The isolates produced IAA at 20–22 µg/ml.
- Taxon
- radishRaphanus sativuse2
- Interactor
- L. varians strain KUBM17Lysinibacillus varianse1symbionte0
- Outcome
- IAA productione0
- Value
- 20–22 µg/mle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“IAA production (20–22 µg/ml)”
e1“L. varians strain KUBM17 and P. putida strain KUBM18 showed very promising PGP traits”
e2“early radish plant growth”
Claim · model-written summary
The isolates showed phosphate solubilization of 55–515 ppm.
- Taxon
- radishRaphanus sativuse2
- Interactor
- L. varians strain KUBM17Lysinibacillus varianse1symbionte0
- Outcome
- phosphate solubilizatione0
- Value
- 55–515 ppme0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“phosphate solubilization (55–515 ppm)”
e1“L. varians strain KUBM17 and P. putida strain KUBM18 showed very promising PGP traits”
e2“early radish plant growth”
Claim · model-written summary
The isolates showed siderophore production of 14–40 nmole.
- Taxon
- radishRaphanus sativuse2
- Interactor
- L. varians strain KUBM17Lysinibacillus varianse1symbionte0
- Outcome
- siderophore productione0
- Value
- 14–40 nmolee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“siderophore production (14–40 nmole)”
e1“L. varians strain KUBM17 and P. putida strain KUBM18 showed very promising PGP traits”
e2“early radish plant growth”
Claim · model-written summary
The isolates improved early radish growth under cadmium and lead stress.
- Taxon
- radishRaphanus sativuse0
- Treatment
- PGPR isolatese0
- Interactor
- PGPR isolatese0symbiont
- Outcome
- early radish plant growthe0
- Direction
- improvede0
- Qualifier
- cadmium and lead stress conditione0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“These PGPR isolates improved the early radish plant growth under cadmium and lead stress condition”
Claim · model-written summary
The authors suggested KUBM17 and KUBM18 as biofertilizers in metal contaminated agricultural soil.
- Taxon
- radishRaphanus sativuse1
- Interactor
- KUBM 17e0symbiont
- Second interactor
- KUBM 18e0symbiont
- Outcome
- PGPR-biofertilizer in heavy metal-contaminated agricultural soile0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“KUBM 17 and KUBM 18 might be concerned as PGPR-biofertilizer in heavy metal-contaminated agricultural soil”
e1“early radish plant growth”
The same questions in other papers
inoculation · growth · Raphanus sativus (radish)Positive and negative results
21 papers in the same direction as this paper · 3 in the opposite direction
- negative
- negative
- negative
21 papers more in this group
See all 25 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.