Abstract
Pythium root rot, caused by various Pythium spp., is a widespread disease of wheat. The objective of this study was to identify bacterial strains from wheat roots in Arkansas that suppressed Pythium root rot and to compare their efficacy with that of bacterial strains from other areas. Bacterial strains (applied as seed treatments) that suppressed Pythium root rot in growth chamber assays were evaluated further for in vitro antibiosis against three Pythium spp. and for efficacy under field conditions. Pseudomonas fluorescens strain 2-79R, Burkholderia cepacia strain 1-23, and Pseudomonas sp. strain 1-30 were the most effective for suppressing Pythium root rot under field conditions and significantly (P = 0.10) increased yield in one experiment. Strains that were effective in the field also expressed in vitro antibiosis to at least two of three Pythium spp.; however, strains expressing the highest levels of antibiosis were not effective in the field. In the field, root rot suppression and yield enhancement were inconsistent across experiments and generally small in magnitude. Therefore, these strains have little potential for commercial use under the conditions in which they were tested.
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Claims 6
Claim · model-written summary
Three bacterial strains were most effective at suppressing Pythium root rot in the field.
- Taxon
- Winter Wheat
Triticum aestivumt0 - Treatment
- Pseudomonas fluorescens strain 2-79R, Burkholderia cepacia strain 1-23, and Pseudomonas sp. strain 1-30e0
- Outcome
- Pythium root rote0
- Direction
- suppressinge0
- Setting
- field conditionse0
.jpg?width=60){kind=small}
PythiumNot reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
.jpg?width=500)
Verbatim
e0“Pseudomonas fluorescens strain 2-79R, Burkholderia cepacia strain 1-23, and Pseudomonas sp. strain 1-30 were the most effective for suppressing Pythium root rot under field conditions”
t0“Winter Wheat”
Claim · model-written summary
The three strains significantly increased yield in one experiment.
- Taxon
- Winter WheatTriticum aestivumt0
- Treatment
- Pseudomonas fluorescens strain 2-79Re0
- Outcome
- yielde0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Pseudomonas fluorescens strain 2-79R, Burkholderia cepacia strain 1-23, and Pseudomonas sp. strain 1-30 were the most effective for suppressing Pythium root rot under field conditions and significantly (P = 0.10) increased yield in one experiment”
t0“Winter Wheat”
Claim · model-written summary
Field-effective strains inhibited at least two Pythium species in vitro.
- Taxon
- Winter WheatTriticum aestivumt0
- Outcome
- in vitro antibiosis to at least two of three Pythium spp.e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Strains that were effective in the field also expressed in vitro antibiosis to at least two of three Pythium spp.”
t0“Winter Wheat”
Claim · model-written summary
Strains with the strongest in vitro antibiosis were ineffective in the field.
- Taxon
- Winter WheatTriticum aestivumt0
- Outcome
- not effective in the fielde0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“strains expressing the highest levels of antibiosis were not effective in the field”
t0“Winter Wheat”
Claim · model-written summary
Field root rot suppression and yield enhancement were inconsistent and generally small.
- Taxon
- Winter WheatTriticum aestivumt0
- Outcome
- root rot suppression and yield enhancemente0
- Qualifier
- inconsistent across experiments and generally small in magnitudee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“root rot suppression and yield enhancement were inconsistent across experiments and generally small in magnitude”
t0“Winter Wheat”
Claim · model-written summary
The strains have little commercial potential under the tested conditions.
- Taxon
- Winter WheatTriticum aestivumt0
- Outcome
- little potential for commercial usee0
- Qualifier
- under the conditions in which they were testede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“these strains have little potential for commercial use under the conditions in which they were tested”
t0“Winter Wheat”
The same questions in other papers
Pseudomonas fluorescens · yield · Triticum aestivum (wheat)Results agree
8 papers in the same direction as this paper
- positive
- positive
- positive
5 papers more in this group
See all 9 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.