Abstract
Pathogenic fungus Rhizoctonia solani causes root rot disease in wheat leading to collapsing of the aerial part of the plant. To characterize antagonistic bacteria, one hundred and thirty bacterial isolates were obtained from the rhizosphere soil of wheat and these rhizobacterial isolates alongwith 72 reference strains were screened for their antagonistic interactions against R. solani under cultural conditions. Sixteen bacterial isolates inhibited the growth of R. solani and growth inhibition zone varied from 6- by different rhizobacterial isolates. Two isolates WPS3 and WPS90 caused maximum growth inhibition of the fungi. Growth inhibiton of the pathogenic fungi was also observed using culture filterates of antagonistic rhizobacterial isolates. The protein estimation of the culture filterates showed that the amount of protein excreted by different rhizobacterial isolates varied from 3.6 to 33.0 mg ml-1 of the supernatant. The loss of antagonistic activity after treatment with proteinase K and high temperature treatment indicated that excreted proteins are responsible for the antagonism. Pot house studies showed that inoculation of R. solani in wheat caused 85-90% root rot disease incidence at 60 to 90 days of plant growth. The single inoculation of rhizobacterial isolate WPS3 resulted in 131% increase of plant dry weight as compared to uninoculated control plants. The coinoculation of isolate WPS3 with R. solani enhanced 115% plant dry weight whereas coinoculation of Pseudomonas isolate WPS90 caused 98% increase in plant dry weight in comparison to control uninoculated plants at 90 days of plant growth. Coinoculation of Pseudomonas isolates WPS3 and WPS90 with R. solani also caused 88.9 and 66.7% disease control, respectively at 90 days of plant growth. Thus, Pseudomonas isolate WPS3 could be further exploited for plant growth improvement under field conditions.
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Claims 12
Claim · model-written summary
Sixteen isolates inhibited R. solani growth.
- Taxon
- wheat
Triticum aestivumt0 - Interactor
- R. solani
Rhizoctonia solanie0pathogen - Outcome
- growth of R. solanie0
- Direction
- inhibitede0
- Value
- Sixteene0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Sixteen bacterial isolates inhibited the growth of R. solani”
t0“Wheat”
Claim · model-written summary
WPS3 and WPS90 produced maximum fungal growth inhibition.
- Taxon
- WheatTriticum aestivumt0
- Outcome
- growth inhibition of the fungie0
- Direction
- maximume0
Not reportedMaterial
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Two isolates WPS3 and WPS90 caused maximum growth inhibition of the fungi”
t0“Wheat”
Claim · model-written summary
Antagonistic isolate filtrates inhibited pathogenic fungal growth.
- Taxon
- WheatTriticum aestivumt0
- Treatment
- culture filterates of antagonistic rhizobacterial isolatese0
- Outcome
- Growth inhibiton of the pathogenic fungie0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Growth inhibiton of the pathogenic fungi was also observed using culture filterates of antagonistic rhizobacterial isolates”
t0“Wheat”
Claim · model-written summary
Excreted protein amounts varied from 3.6 to 33.0 mg ml-1.
- Taxon
- WheatTriticum aestivumt0
- Outcome
- amount of protein excreted by different rhizobacterial isolatese0
- Value
- 3.6 to 33.0 mg ml-1e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the amount of protein excreted by different rhizobacterial isolates varied from 3.6 to 33.0 mg ml-1 of the supernatant”
t0“Wheat”
Claim · model-written summary
Proteinase K and heat eliminated antagonistic activity, implicating excreted proteins.
- Taxon
- WheatTriticum aestivumt0
- Treatment
- proteinase K and high temperature treatmente0
- Outcome
- loss of antagonistic activitye0
- Qualifier
- excreted proteins are responsible for the antagonisme0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The loss of antagonistic activity after treatment with proteinase K and high temperature treatment indicated that excreted proteins are responsible for the antagonism”
t0“Wheat”
Claim · model-written summary
R. solani inoculation produced 85-90% wheat root rot incidence.
- Taxon
- wheatTriticum aestivume0
- Treatment
- inoculation of R. solanie0
- Interactor
- R. solaniRhizoctonia solanie0pathogen
- Outcome
- root rot disease incidencee0
- Value
- 85-90%e0
- Qualifier
- 60 to 90 days of plant growthe0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“inoculation of R. solani in wheat caused 85-90% root rot disease incidence at 60 to 90 days of plant growth”
Claim · model-written summary
WPS3 alone increased wheat dry weight by 131%.
- Taxon
- WheatTriticum aestivumt0
- Treatment
- single inoculation of rhizobacterial isolate WPS3e0
- Interactor
- rhizobacterial isolate WPS3e0biocontrol_agent
- Outcome
- plant dry weighte0
- Direction
- increasee0
- Value
- 131%e0
- Comparator
- uninoculated control plantse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The single inoculation of rhizobacterial isolate WPS3 resulted in 131% increase of plant dry weight as compared to uninoculated control plants”
t0“Wheat”
Claim · model-written summary
WPS3 plus R. solani increased dry weight by 115%.
- Taxon
- WheatTriticum aestivumt0
- Treatment
- coinoculation of isolate WPS3 with R. solanie0
- Interactor
- R. solaniRhizoctonia solanie0pathogen
- Second interactor
- isolate WPS3e0biocontrol_agent
- Outcome
- plant dry weighte0
- Direction
- enhancede0
- Value
- 115%e0
- Comparator
- control uninoculated plantse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The coinoculation of isolate WPS3 with R. solani enhanced 115% plant dry weight whereas coinoculation of Pseudomonas isolate WPS90 caused 98% increase in plant dry weight in comparison to control uninoculated plants at 90 days of plant growth”
t0“Wheat”
Claim · model-written summary
WPS90 plus R. solani increased dry weight by 98%.
- Taxon
- WheatTriticum aestivumt0
- Treatment
- coinoculation of Pseudomonas isolate WPS90e0
- Interactor
- Pseudomonas isolate WPS90e0biocontrol_agent
- Outcome
- plant dry weighte0
- Direction
- increasee0
- Value
- 98%e0
- Comparator
- control uninoculated plantse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“coinoculation of Pseudomonas isolate WPS90 caused 98% increase in plant dry weight in comparison to control uninoculated plants at 90 days of plant growth”
t0“Wheat”
Claim · model-written summary
WPS3 with R. solani controlled disease by 88.9%.
- Taxon
- WheatTriticum aestivumt0
- Treatment
- Coinoculation of Pseudomonas isolates WPS3e0
- Interactor
- R. solaniRhizoctonia solanie0pathogen
- Second interactor
- WPS3e0biocontrol_agent
- Outcome
- disease controle0
- Value
- 88.9e0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Coinoculation of Pseudomonas isolates WPS3 and WPS90 with R. solani also caused 88.9 and 66.7% disease control, respectively at 90 days of plant growth”
t0“Wheat”
Claim · model-written summary
WPS90 with R. solani controlled disease by 66.7%.
- Taxon
- WheatTriticum aestivumt0
- Treatment
- Coinoculation of Pseudomonas isolates WPS3 and WPS90 with R. solanie0
- Interactor
- R. solaniRhizoctonia solanie0pathogen
- Second interactor
- WPS90e0biocontrol_agent
- Outcome
- disease controle0
- Value
- 66.7%e0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Coinoculation of Pseudomonas isolates WPS3 and WPS90 with R. solani also caused 88.9 and 66.7% disease control, respectively at 90 days of plant growth”
t0“Wheat”
Claim · model-written summary
WPS3 merits further field evaluation for growth improvement.
- Taxon
- WheatTriticum aestivumt0
- Interactor
- Pseudomonas isolate WPS3e0biocontrol_agent
- Outcome
- plant growth improvement under field conditionse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Pseudomonas isolate WPS3 could be further exploited for plant growth improvement under field conditions”
t0“Wheat”
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