Abstract
Plant growth promoting rhizobacteria (PGPR) viz. Pseudomonas fluorescens, Bacillus megaterium, B. subtilis, and B. cereus and their metabolic products may play a pivotal role in controlling root rot and wilt diseases in faba bean plants caused by Rhizoctonia solani, Fusarium solani, F. oxysporum, and Macrophomina phaseolina and promote plant growth under greenhouse and field conditions. Cell cultures, extracellular metabolites, volatile metabolites of all tested PGPR strains were suppressed the linear growth of all tested pathogenic fungi in vitro. P. fluorescens followed by B. megaterium were more active than B. subtilis and B. cereus in reduction of the tested fungi radial growth. All PGPR strains were able to produce IAA, HCN, siderophore, Ammonia in media growth. P. fluorescens produced the highest levels of cyanide hydrogen and ammonia followed by B. subtilis, while the higher level of IAA was produced by B. subtilis followed by P. fluorescens. Also, B. megaterium was the most PGPR strain produced siderophore followed by P. fluorescens. All the tested PGPR strains successfully solubilized inorganic phosphate on Pikovskya’s agar medium. Also, all plant growth promoting rhizobacteria strains (PGPR) were able to produce mycolytic enzymes viz. cellulase, chitinase ?-1,3-glucanase, amylase and protease except B. cereus and B. megaterium not able to produce protease and amylase. B. megaterium recorded the highest activities of chitinase, ?-1,3-glucanase, while, B. cereus produced the lowest levels of all tested enzymes.
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Claims 11
Claim · model-written summary
Cell cultures, extracellular metabolites and volatile metabolites of all tested PGPR strains suppressed the linear growth of all tested pathogenic fungi in vitro.
- Taxon
- Faba Bean Plants
Vicia fabat0 - Treatment
- Cell cultures, extracellular metabolites, volatile metabolites of all tested PGPR strainse1
- Interactor
- pathogenic fungie1pathogen
- Second interactor
- PGPR strainse1biocontrol_agent
- Outcome
- linear growth of all tested pathogenic fungie1
- Direction
- suppressede1
- Setting
- in vitroe1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Faba Bean Plants”
e1“Cell cultures, extracellular metabolites, volatile metabolites of all tested PGPR strains were suppressed the linear growth of all tested pathogenic fungi in vitro”
Claim · model-written summary
P. fluorescens, followed by B. megaterium, was more active than B. subtilis and B. cereus in reducing the radial growth of the tested fungi.
- Taxon
- Faba Bean PlantsVicia fabat0
- Treatment
- P. fluorescens followed by B. megateriume1
- Interactor
- tested fungie1pathogen
- Second interactor
- P. fluorescens
.JPG?width=60)
Pseudomonas fluorescense1biocontrol_agent - Outcome
- reduction of the tested fungi radial growthe1
- Direction
- more activee1
- Comparator
- B. subtilis and B. cereuse1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
.JPG?width=500)
Verbatim
t0“Faba Bean Plants”
e1“P. fluorescens followed by B. megaterium were more active than B. subtilis and B. cereus in reduction of the tested fungi radial growth”
Claim · model-written summary
All tested PGPR strains produced IAA and HCN in growth media.
Not reportedDirection
Verbatim
e1“All PGPR strains were able to produce IAA, HCN, siderophore, Ammonia in media growth”
Claim · model-written summary
All tested PGPR strains produced siderophore and ammonia in growth media.
Not reportedDirection
Verbatim
e1“All PGPR strains were able to produce IAA, HCN, siderophore, Ammonia in media growth”
Claim · model-written summary
P. fluorescens produced the highest levels of hydrogen cyanide and ammonia, followed by B. subtilis.
- Taxon
- P. fluorescensPseudomonas fluorescense1
- Outcome
- levels of cyanide hydrogen and ammoniae1
- Direction
- higheste1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“P. fluorescens produced the highest levels of cyanide hydrogen and ammonia followed by B. subtilis”
Claim · model-written summary
B. subtilis produced the higher level of IAA, followed by P. fluorescens.
- Taxon
- B. subtilis
Bacillus subtilise1 - Outcome
- level of IAAe1
- Direction
- highere1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“the higher level of IAA was produced by B. subtilis followed by P. fluorescens”
Claim · model-written summary
B. megaterium was the strain producing the most siderophore, followed by P. fluorescens.
- Taxon
- B. megaterium
Priestia megateriume1 - Outcome
- siderophoree1
- Direction
- moste1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“B. megaterium was the most PGPR strain produced siderophore followed by P. fluorescens”
Claim · model-written summary
All tested PGPR strains solubilized inorganic phosphate on Pikovskya agar medium.
Not reportedDirection
Verbatim
e1“All the tested PGPR strains successfully solubilized inorganic phosphate on Pikovskya’s agar medium”
Claim · model-written summary
All PGPR strains produced the mycolytic enzymes cellulase, chitinase, beta-1,3-glucanase, amylase and protease, except B. cereus and B. megaterium, which did not produce protease and amylase.
Not reportedDirection
Verbatim
e1“all plant growth promoting rhizobacteria strains (PGPR) were able to produce mycolytic enzymes viz. cellulase, chitinase ?-1,3-glucanase, amylase and protease except B. cereus and B. megaterium not able to produce protease and amylase”
Claim · model-written summary
B. megaterium recorded the highest activities of chitinase and beta-1,3-glucanase.
- Taxon
- B. megateriumPriestia megateriume1
- Outcome
- activities of chitinase, ?-1,3-glucanasee1
- Direction
- higheste1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“B. megaterium recorded the highest activities of chitinase, ?-1,3-glucanase”
Claim · model-written summary
B. cereus produced the lowest levels of all tested enzymes.
- Taxon
- B. cereus
Bacillus cereuse1 - Outcome
- levels of all tested enzymese1
- Direction
- loweste1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“B. cereus produced the lowest levels of all tested enzymes”
The same questions in other papers
metabolite · disease · Vicia faba (faba bean)Results agree
1 paper in the same direction as this paper
- positive
Pseudomonas fluorescens · disease · Vicia faba (faba bean)Results agree
1 paper in the same direction as this paper
- positive
Priestia megaterium · disease · Vicia faba (faba bean)Results agree
3 papers in the same direction as this paper
- positive
- positive
- positive
inoculation · disease · Vicia faba (faba bean)Positive and negative results
18 papers in the same direction as this paper · 4 in the opposite direction
- negative
- negative
- 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.