Abstract
Rhizoctonia solani AG-8 is a major wheat root pathogen; however, soils can become suppressive to the expression of disease under intensive cropping with retention of crop residues. This is in part due to the action of soil microorganisms. A step-wise approach was used to determine which microorganisms contributed to suppression of R. solani induced disease in a disease-suppressive soil. Using wheat-soil-pathogen bioassays it was determined that the interaction between 3 phylogenetically diverse groups of bacteria, Pantoea agglomerans, Exiguobacterium acetylicum, and Microbacteria (family Microbacteriaceae), was a major contributor to disease suppression. Inoculation of a sterilised soil with the combination of these groups resulted in greatly increased seedling shoot dry weight and reduced infection compared with diseased control plants with no bacterial inoculation, or inoculated with individual types of bacteria. These groups, however, did not reduce levels of pathogen DNA, although inoculation with suppressive soil (at 10% w/w) did reduce pathogen DNA. Root associated P. agglomerans and E. acetylicum promoted the growth of infected wheat plants and soil associated Microbacteria reduced root infection by R. solani.
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Claims 8
Claim · model-written summary
The three bacterial groups together were a major contributor to wheat disease suppression.
- Taxon
- wheat
Triticum aestivumt0 - Interactor
- Pantoea agglomerans
Pantoea agglomeranse0biocontrol_agent - Second interactor
- Exiguobacterium acetylicumExiguobacterium acetylicume0biocontrol_agent
- Outcome
- disease suppressione0
- Qualifier
- Microbacteriae0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“wheat”
e0“the interaction between 3 phylogenetically diverse groups of bacteria, Pantoea agglomerans, Exiguobacterium acetylicum, and Microbacteria (family Microbacteriaceae), was a major contributor to disease suppression”
Claim · model-written summary
Combined bacterial inoculation greatly increased wheat seedling shoot dry weight relative to diseased controls and individual inoculations.
- Taxon
- wheatTriticum aestivumt0
- Treatment
- Inoculation of a sterilised soil with the combination of these groupse0
- Outcome
- seedling shoot dry weighte0
- Direction
- increasede0
- Comparator
- diseased control plants with no bacterial inoculation, or inoculated with individual types of bacteriae0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“wheat”
e0“Inoculation of a sterilised soil with the combination of these groups resulted in greatly increased seedling shoot dry weight and reduced infection compared with diseased control plants with no bacterial inoculation, or inoculated with individual types of bacteria”
Claim · model-written summary
Combined bacterial inoculation reduced wheat infection relative to diseased controls and individual inoculations.
- Taxon
- wheatTriticum aestivumt0
- Treatment
- Inoculation of a sterilised soil with the combination of these groupse0
- Outcome
- infectione0
- Direction
- reducede0
- Comparator
- diseased control plants with no bacterial inoculation, or inoculated with individual types of bacteriae0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“wheat”
e0“Inoculation of a sterilised soil with the combination of these groups resulted in greatly increased seedling shoot dry weight and reduced infection compared with diseased control plants with no bacterial inoculation, or inoculated with individual types of bacteria”
Claim · model-written summary
The bacterial groups did not reduce pathogen DNA.
- Taxon
- wheatTriticum aestivumt0
- Treatment
- These groupse0
- Interactor
- Rhizoctonia solani AG-8
Rhizoctonia solani AG-8t0pathogen - Outcome
- pathogen DNAe0
- Direction
- did not reducee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Rhizoctonia solani AG-8 induced disease on wheat”
e0“These groups, however, did not reduce levels of pathogen DNA”
Claim · model-written summary
Suppressive soil inoculation reduced pathogen DNA.
- Taxon
- wheatTriticum aestivumt0
- Treatment
- inoculation with suppressive soil (at 10% w/w)e0
- Interactor
- Rhizoctonia solani AG-8Rhizoctonia solani AG-8t0pathogen
- Outcome
- pathogen DNAe0
- Direction
- reducee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Rhizoctonia solani AG-8 induced disease on wheat”
e0“inoculation with suppressive soil (at 10% w/w) did reduce pathogen DNA”
Claim · model-written summary
Root associated P. agglomerans promoted growth of infected wheat.
- Taxon
- wheatTriticum aestivume0
- Treatment
- P. agglomeranse0
- Interactor
- P. agglomeransPantoea agglomeranse0biocontrol_agent
- Outcome
- growth of infected wheat plantse0
- Direction
- promotede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Root associated P. agglomerans and E. acetylicum promoted the growth of infected wheat plants”
Claim · model-written summary
Root associated E. acetylicum promoted growth of infected wheat.
- Taxon
- wheatTriticum aestivume0
- Treatment
- E. acetylicume0
- Interactor
- E. acetylicumExiguobacterium acetylicume0biocontrol_agent
- Outcome
- growth of infected wheat plantse0
- Direction
- promotede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Root associated P. agglomerans and E. acetylicum promoted the growth of infected wheat plants”
Claim · model-written summary
Soil associated Microbacteria reduced wheat root infection by R. solani.
- Taxon
- wheatTriticum aestivumt0
- Treatment
- Microbacteriae0
- Interactor
- R. solaniRhizoctonia solanie0pathogen
- Second interactor
- Microbacteriae0biocontrol_agent
- Outcome
- root infection by R. solanie0
- Direction
- reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“wheat”
e0“soil associated Microbacteria reduced root infection by R. solani”
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475 papers in the same direction as this paper · 55 in the opposite direction · 1 reporting no difference from an alternative
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See all 532 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.