Abstract
Various rhizobacteria strains are isolated and tested worldwide for their plant growth promoting activities. A strain is said to be a plant growth promoter if it has the ability to influence plant growth directly or indirectly. Though the main focus has always been to realize the plant growth promoting traits of rhizobacteria and use them as biofertilizers, but the disadvantages or deleterious effects of such plant growth promoting rhizobacteria (PGPR) if any have also been ignored to a greater extent. The present study deals with the characterization of both promoting as well as deleterious activities of an isolated strain of Pseudomonas aeruginosa on plants. The bacterium was isolated from the soil of the college campus of Babasaheb Bhimrao Ambedkar University, Lucknow, Uttar Pradesh and was characterized as P. aeruginosa by various positive biochemical tests such as oxidase, catalase, citrate tests and confirmed by MALDI-TOF-MS. Its growth as well as IAA producing ability at different salt (NaCl) concentrations was tested. Tests examining HCN, Ammonia and siderophore production, flocculation ability, phosphate and zinc solubilization by the strain were carried out. Its anti-microbial property was tested against three phytopathogenic fungi: Fusarium solani, Aspergillus niger and Curvularia lunata and two bacterial strains - Klebsiella pneumoniae and E. coli. Its effect over seed germination of Triticum aestivum and Zea mays was inspected in plates as well as in pots. The strain showed a great potential as a plant growth promoter growing up to 10% NaCl concentration and producing considerable amount of IAA upto 8% NaCl concentration. It showed antagonistic nature against the three phytopathogenic fungi, solubilized phosphate and produced siderophore and NH3. Though supernatant of the bacterial culture did not show any deleterious effect over seed (of the test plants T. aestivum and Z. mays) germination but the seeds inoculated with the strain itself, failed to germinate. The seed turned dormant and grew a pale brown color showing bacterial growth over it. Thus it maybe concluded that the isolated strain of P. aeruginosa has abilities to both promote and at the same time inhibit plant growth (by inhibiting seed germination).
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Claims 9
Claim · model-written summary
The isolated P. aeruginosa strain grew up to 10% NaCl.
- Taxon
- Triticum aestivum
Triticum aestivume1 - Interactor
- P. aeruginosa
Pseudomonas aeruginosae2symbiont - Outcome
- P. aeruginosae2
- Value
- 10% NaCle0
- Setting
- Lucknow, Uttar Pradeshe2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The strain showed a great potential as a plant growth promoter growing up to 10% NaCl concentration”
e1“Its effect over seed germination of Triticum aestivum and Zea mays was inspected in plates as well as in pots.”
e2“The bacterium was isolated from the soil of the college campus of Babasaheb Bhimrao Ambedkar University, Lucknow, Uttar Pradesh and was characterized as P. aeruginosa”
Claim · model-written summary
The strain produced IAA up to 8% NaCl.
- Interactor
- P. aeruginosaPseudomonas aeruginosae2symbiont
- Outcome
- IAAe0
- Value
- 8% NaCle0
Zea maysOrganisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“producing considerable amount of IAA upto 8% NaCl concentration”
e1“Its effect over seed germination of Triticum aestivum and Zea mays was inspected in plates as well as in pots.”
e2“characterized as P. aeruginosa”
Claim · model-written summary
The strain antagonized three phytopathogenic fungi.
- Taxon
- Triticum aestivumTriticum aestivume2
- Interactor
- Fusarium solani
_Sacc._5393379.jpg?width=60)
Fusarium solanie1pathogen - Second interactor
- Aspergillus niger
Aspergillus nigere1pathogen - Outcome
- antagonistic nature against the three phytopathogenic fungie0
- Qualifier
- Curvularia lunatae1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
_Sacc._5393379.jpg?width=500)
Verbatim
e0“It showed antagonistic nature against the three phytopathogenic fungi”
e1“Its anti-microbial property was tested against three phytopathogenic fungi: Fusarium solani, Aspergillus niger and Curvularia lunata”
e2“Its effect over seed germination of Triticum aestivum and Zea mays was inspected”
Claim · model-written summary
The strain solubilized phosphate and produced siderophore and NH3.
- Taxon
- Triticum aestivumTriticum aestivume1
- Interactor
- P. aeruginosaPseudomonas aeruginosae2symbiont
- Outcome
- solubilized phosphate and produced siderophore and NH3e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“solubilized phosphate and produced siderophore and NH3”
e1“Its effect over seed germination of Triticum aestivum and Zea mays was inspected”
e2“characterized as P. aeruginosa”
Claim · model-written summary
Bacterial culture supernatant had no deleterious effect on T. aestivum seed germination.
- Taxon
- T. aestivumTriticum aestivume0
- Treatment
- supernatant of the bacterial culturee0
- Interactor
- Pseudomonas aeruginosaPseudomonas aeruginosae1symbiont
- Outcome
- germinatione0
- Direction
- did not show any deleterious effecte0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“supernatant of the bacterial culture did not show any deleterious effect over seed (of the test plants T. aestivum and Z. mays) germination”
e1“isolated strain of Pseudomonas aeruginosa”
Claim · model-written summary
Bacterial culture supernatant had no deleterious effect on Z. mays seed germination.
- Treatment
- supernatant of the bacterial culturee0
- Interactor
- Pseudomonas aeruginosaPseudomonas aeruginosae1symbiont
- Outcome
- germinatione0
- Direction
- did not show any deleterious effecte0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“supernatant of the bacterial culture did not show any deleterious effect over seed (of the test plants T. aestivum and Z. mays) germination”
e1“isolated strain of Pseudomonas aeruginosa”
Claim · model-written summary
Seeds of T. aestivum inoculated with the strain failed to germinate.
- Taxon
- T. aestivumTriticum aestivume1
- Treatment
- inoculated with the strain itselfe0
- Interactor
- Pseudomonas aeruginosaPseudomonas aeruginosae2symbiont
- Outcome
- failed to germinatee0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the seeds inoculated with the strain itself, failed to germinate”
e1“test plants T. aestivum and Z. mays”
e2“isolated strain of Pseudomonas aeruginosa”
Claim · model-written summary
Seeds of Z. mays inoculated with the strain failed to germinate.
- Treatment
- inoculated with the strain itselfe0
- Interactor
- Pseudomonas aeruginosaPseudomonas aeruginosae2symbiont
- Outcome
- failed to germinatee0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the seeds inoculated with the strain itself, failed to germinate”
e1“test plants T. aestivum and Z. mays”
e2“isolated strain of Pseudomonas aeruginosa”
Claim · model-written summary
Inoculated seeds became dormant and pale brown with bacterial growth.
- Taxon
- T. aestivumTriticum aestivume1
- Interactor
- Pseudomonas aeruginosaPseudomonas aeruginosae2symbiont
- Outcome
- turned dormant and grew a pale brown color showing bacterial growthe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The seed turned dormant and grew a pale brown color showing bacterial growth over it.”
e1“test plants T. aestivum and Z. mays”
e2“isolated strain of Pseudomonas aeruginosa”
The same questions in other papers
inoculation · Pseudomonas aeruginosa · Triticum aestivum (wheat)Positive and negative results
1 in the opposite direction
- positive
inoculation · Pseudomonas aeruginosa · Zea mays (maize)Positive and negative results
6 in the opposite direction
- positive
- positive
- positive
3 papers more in this group
See all 7 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.