Abstract
Abstract The aim of this study was to verify that induced resistance was another mechanism through which Bacillus pumilus 7 km can suppress Gaeumannomyces graminis (Sacc.) Von Arx and Oliver var. tritici Walker (Ggt). Also, plant growth‐promotion activity of B. pumilus 7 km and its effect on disease severity of take‐all were evaluated. Soil was drenched with B. pumilus 7 km and disease severity, root and shoot fresh weights and root and shoot heights were evaluated. The activities of soluble peroxidase (SPOX), ionically cell wall‐bound peroxidase (CWPOX), β ‐1,3‐glucanase, β ‐1,4‐glucanase and the contents of total phenolic compounds were also determined. The results indicated that disease severity in the bacterized roots was significantly less than the pathogen control roots. Also this isolate promoted root height, root and shoot fresh weights, compared with the healthy control plants. Wheat plants treated with B. pumilus 7 km showed increased presence of SPOX, CWPOX, β ‐1,3‐glucanase, β ‐1,4‐glucanase and phenolic compounds in bacterized roots challenged with the pathogen. In this treatment, maximum SPOX, β ‐1,3‐glucanase and β ‐1,4‐glucanase activities on day 4 and CWPOX activity on day 8 were recorded. Also, maximum total phenolic concentration on day 6 was recorded. The results suggest that the inhibitory effect of B. pumilus 7 km on the take‐all may be related to its ability to enhance defense responses in the wheat roots.
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Claims 8
Claim · model-written summary
Bacterized wheat roots had significantly less disease than pathogen controls.
- Taxon
- Wheat
Triticum aestivumt0 - Treatment
- B. pumilus 7 kme1
- Interactor
- Gaeumannomyces graminis var. triticiGaeumannomyces triticit0pathogen
- Second interactor
- B. pumilus 7 kmBacillus pumiluse1biocontrol_agent
- Outcome
- disease severitye0
- Direction
- lesse0
- Comparator
- pathogen control rootse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“disease severity in the bacterized roots was significantly less than the pathogen control roots”
t0“Wheat Seedling Roots against the Take‐all Fungus, Gaeumannomyces graminis var. tritici”
e1“Soil was drenched with B. pumilus 7 km”
Claim · model-written summary
B. pumilus promoted root height and root and shoot fresh weights compared with healthy controls.
- Taxon
- WheatTriticum aestivumt0
- Treatment
- B. pumilus 7 kme1
- Interactor
- B. pumilus 7 kmBacillus pumiluse1biocontrol_agent
- Outcome
- root height, root and shoot fresh weightse0
- Direction
- promotede0
- Comparator
- healthy control plantse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“this isolate promoted root height, root and shoot fresh weights, compared with the healthy control plants”
e1“Soil was drenched with B. pumilus 7 km”
t0“Wheat Seedling Roots”
Claim · model-written summary
B. pumilus treatment increased root peroxidase and glucanase activities under pathogen challenge.
- Taxon
- WheatTriticum aestivume0
- Organ / stage
- rootse0
- Treatment
- B. pumilus 7 kme0
- Interactor
- B. pumilus 7 kmBacillus pumiluse0biocontrol_agent
- Outcome
- SPOX, CWPOX, β ‐1,3‐glucanase, β ‐1,4‐glucanasee0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Wheat plants treated with B. pumilus 7 km showed increased presence of SPOX, CWPOX, β ‐1,3‐glucanase, β ‐1,4‐glucanase and phenolic compounds in bacterized roots challenged with the pathogen”
Claim · model-written summary
B. pumilus treatment increased phenolic compounds in challenged wheat roots.
- Taxon
- WheatTriticum aestivume0
- Organ / stage
- rootse0
- Treatment
- B. pumilus 7 kme0
- Interactor
- B. pumilus 7 kmBacillus pumiluse0biocontrol_agent
- Outcome
- phenolic compoundse0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Wheat plants treated with B. pumilus 7 km showed increased presence of SPOX, CWPOX, β ‐1,3‐glucanase, β ‐1,4‐glucanase and phenolic compounds in bacterized roots challenged with the pathogen”
Claim · model-written summary
SPOX and both glucanase activities peaked on day 4.
- Taxon
- WheatTriticum aestivumt0
- Outcome
- SPOX, β ‐1,3‐glucanase and β ‐1,4‐glucanase activitiese0
- Direction
- maximume0
- Value
- day 4e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“maximum SPOX, β ‐1,3‐glucanase and β ‐1,4‐glucanase activities on day 4”
e1“In this treatment”
t0“Wheat Seedling Roots”
Claim · model-written summary
CWPOX activity peaked on day 8.
- Taxon
- WheatTriticum aestivumt0
- Outcome
- CWPOX activitye0
- Direction
- maximume1
- Value
- day 8e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“CWPOX activity on day 8”
e1“maximum SPOX, β ‐1,3‐glucanase and β ‐1,4‐glucanase activities on day 4 and CWPOX activity on day 8”
t0“Wheat Seedling Roots”
Claim · model-written summary
Total phenolic concentration peaked on day 6.
- Taxon
- WheatTriticum aestivumt0
- Outcome
- total phenolic concentratione0
- Direction
- maximume0
- Value
- day 6e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“maximum total phenolic concentration on day 6”
t0“Wheat Seedling Roots”
Claim · model-written summary
The authors suggest that enhanced root defense responses may explain take-all suppression by B. pumilus.
- Taxon
- wheatTriticum aestivume0
- Interactor
- B. pumilus 7 kmBacillus pumiluse0biocontrol_agent
- Outcome
- inhibitory effect of B. pumilus 7 km on the take‐alle0
- Qualifier
- enhance defense responses in the wheat rootse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the inhibitory effect of B. pumilus 7 km on the take‐all may be related to its ability to enhance defense responses in the wheat roots”
The same questions in other papers
Bacillus pumilus · growth · Triticum aestivum (wheat)Results agree
4 papers in the same direction as this paper
- positive
- positive
- positive
1 paper more in this group
See all 5 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.