Abstract
Plant growth-promoting rhizobacteria (PGPR) is a microbial population found in the rhizosphere of plants that can stimulate plant development and restrict the growth of plant diseases directly or indirectly. In this study, 90 rhizospheric soil samples from five agro climatic zones of chilli (Capsicum annuum L.) were collected and rhizobacteria were isolated, screened and characterized at morphological, biochemical and molecular levels. In total, 38% of rhizobacteria exhibited the antagonistic capacity to suppress Ralstonia solanacearum growth and showed PGPR activities such as indole acetic acid production by 67.64% from total screened rhizobacteria isolates, phosphorus solubilization by 79.41%, ammonia by 67.75%, HCN by 58.82% and siderophore by 55.88%. We performed a principal component analysis depicting correlation and significance among plant growth-promoting activities, growth parameters of chilli and rhizobacterial strains. Plant inoculation studies indicated a significant increase in growth parameters and PDS1 strain showed maximum 71.11% biocontrol efficiency against wilt disease. The best five rhizobacterial isolates demonstrating both plant growth-promotion traits and biocontrol potential were characterized and identified as PDS1—Pseudomonas fluorescens (MN368159), BDS1—Bacillus subtilis (MN395039), UK4—Bacillus cereus (MT491099), UK2—Bacillus amyloliquefaciens (MT491100) and KA9—Bacillus subtilis (MT491101). These rhizobacteria have the potential natural elicitors to be used as biopesticides and biofertilizers to improve crop health while warding off soil-borne pathogens. The chilli cv. Pusa Jwala treated with Bacillus subtilis KA9 and Pseudomonas fluorescens PDS1 showed enhancement in the defensive enzymes PO, PPO, SOD and PAL activities in chilli leaf and root tissues, which collectively contributed to induced resistance in chilli plants against Ralstonia solanacearum. The induction of these defense enzymes was found higher in leave tissues (PO—4.87-fold, PP0—9.30-fold, SOD—9.49-fold and PAL—1.04-fold, respectively) in comparison to roots tissue at 48 h after pathogen inoculation. The findings support the view that plant growth-promoting rhizobacteria boost defense-related enzymes and limit pathogen growth in chilli plants, respectively, hence managing the chilli bacterial wilt.
Abstract from the paper’s OpenAlex record; open copy licensed cc-by. Read at the source ↗
The text the model read, with the source record’s inline markup (italics, sub- and superscripts) rendered and its character entities decoded; quote offsets refer to the raw text.
Claims 15
Claim · model-written summary
Thirty-eight percent of rhizobacteria suppressed Ralstonia solanacearum growth.
- Taxon
- chillit0
- Interactor
- Ralstonia solanacearum
Ralstonia solanacearume0pathogen - Outcome
- Ralstonia solanacearum growthe0
- Value
- 38%e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“38% of rhizobacteria exhibited the antagonistic capacity to suppress Ralstonia solanacearum growth”
t0“Chilli”
Claim · model-written summary
Indole acetic acid production occurred in 67.64% of screened rhizobacteria.
Verbatim
e0“indole acetic acid production by 67.64% from total screened rhizobacteria isolates”
t0“Chilli”
Claim · model-written summary
Phosphorus solubilization occurred in 79.41% of screened isolates.
Verbatim
e0“phosphorus solubilization by 79.41%”
t0“Chilli”
Claim · model-written summary
Ammonia production occurred in 67.75% of screened isolates.
Verbatim
e0“ammonia by 67.75%”
t0“Chilli”
Claim · model-written summary
HCN production occurred in 58.82% of screened isolates.
Verbatim
e0“HCN by 58.82%”
t0“Chilli”
Claim · model-written summary
Siderophore production occurred in 55.88% of screened isolates.
Verbatim
e0“siderophore by 55.88%”
t0“Chilli”
Claim · model-written summary
Plant inoculation significantly increased chilli growth parameters.
Not reportedComparator
Verbatim
e0“Plant inoculation studies indicated a significant increase in growth parameters”
t0“Chilli”
Claim · model-written summary
PDS1 achieved 71.11% biocontrol efficiency against wilt disease.
Verbatim
e0“PDS1 strain showed maximum 71.11% biocontrol efficiency against wilt disease”
t0“Chilli”
Claim · model-written summary
Five isolates with growth promotion and biocontrol potential were identified.
Verbatim
e0“The best five rhizobacterial isolates demonstrating both plant growth-promotion traits and biocontrol potential were characterized and identified as PDS1—Pseudomonas fluorescens (MN368159), BDS1—Bacillus subtilis (MN395039), UK4—Bacillus cereus (MT491099), UK2—Bacillus amyloliquefaciens (MT491100) and KA9—Bacillus subtilis (MT491101)”
t0“Chilli”
Claim · model-written summary
Bacillus subtilis KA9 enhanced defense enzyme activities in chilli leaf and root tissues.
- Taxon
- chillie0
- Material
- Pusa Jwalae0
- Organ / stage
- leaf and root tissuese0
- Treatment
- Bacillus subtilis KA9e0
- Interactor
- Bacillus subtilis KA9
Bacillus subtilise0biocontrol_agent - Outcome
- defensive enzymes PO, PPO, SOD and PAL activitiese0
- Direction
- enhancemente0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The chilli cv. Pusa Jwala treated with Bacillus subtilis KA9 and Pseudomonas fluorescens PDS1 showed enhancement in the defensive enzymes PO, PPO, SOD and PAL activities in chilli leaf and root tissues”
Claim · model-written summary
Pseudomonas fluorescens PDS1 enhanced defense enzyme activities in chilli leaf and root tissues.
- Taxon
- chillie0
- Material
- Pusa Jwalae0
- Organ / stage
- leaf and root tissuese0
- Treatment
- Pseudomonas fluorescens PDS1e0
- Interactor
- Pseudomonas fluorescens PDS1
.JPG?width=60)
Pseudomonas fluorescense0biocontrol_agent - Outcome
- defensive enzymes PO, PPO, SOD and PAL activitiese0
- Direction
- enhancemente0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
.JPG?width=500)
Verbatim
e0“The chilli cv. Pusa Jwala treated with Bacillus subtilis KA9 and Pseudomonas fluorescens PDS1 showed enhancement in the defensive enzymes PO, PPO, SOD and PAL activities in chilli leaf and root tissues”
Claim · model-written summary
Leaf PO induction was 4.87-fold higher than in roots after pathogen inoculation.
Verbatim
e0“The induction of these defense enzymes was found higher in leave tissues (PO—4.87-fold, PP0—9.30-fold, SOD—9.49-fold and PAL—1.04-fold, respectively) in comparison to roots tissue at 48 h after pathogen inoculation”
t0“Chilli”
Claim · model-written summary
Leaf PPO induction was 9.30-fold higher than in roots after pathogen inoculation.
Verbatim
e0“The induction of these defense enzymes was found higher in leave tissues (PO—4.87-fold, PP0—9.30-fold, SOD—9.49-fold and PAL—1.04-fold, respectively) in comparison to roots tissue at 48 h after pathogen inoculation”
t0“Chilli”
Claim · model-written summary
Leaf SOD induction was 9.49-fold higher than in roots after pathogen inoculation.
Verbatim
e0“The induction of these defense enzymes was found higher in leave tissues (PO—4.87-fold, PP0—9.30-fold, SOD—9.49-fold and PAL—1.04-fold, respectively) in comparison to roots tissue at 48 h after pathogen inoculation”
t0“Chilli”
Claim · model-written summary
Leaf PAL induction was 1.04-fold higher than in roots after pathogen inoculation.
Verbatim
e0“The induction of these defense enzymes was found higher in leave tissues (PO—4.87-fold, PP0—9.30-fold, SOD—9.49-fold and PAL—1.04-fold, respectively) in comparison to roots tissue at 48 h after pathogen inoculation”
t0“Chilli”
The same questions in other papers
Bacillus subtilis · physiology: antioxidant enzymes · Capsicum (peppers)Results agree
1 paper in the same direction as this paper
- positive
Pseudomonas fluorescens · physiology: antioxidant enzymes · Capsicum (peppers)Results agree
3 papers in the same direction as this paper
- positive
- positive
- positive
inoculation · growth · Capsicum (peppers)Positive and negative results
47 papers in the same direction as this paper · 8 in the opposite direction
- positive
- no effect
- no effect
52 papers more in this group
See all 56 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.