Abstract
Couch grass rhizomes harbour Gaeumannomyces graminis var. tritici (Ggt), which causes take-all of wheat. Glyphosate used after cereal harvest to control couch can increase take- all in subsequent wheat crops. Following glyphosate treatment, the colonisation of senescing couch rhizomes by Ggt when treated with the endophytic fungus Microdochium bolleyi, and the spread of Ggt from senescing couch rhizomes to wheat when treated with the rhizobacterium Pseudomonas fluorescens, were investigated in two separate experiments. In Experiment 1, glyphosate increased Ggt inoculum in couch, irrespective of whether M. bolleyi was added to the potting medium. In Experiment 2, take-all severity and Ggt DNA concentration in roots of the accompanying wheat plants tended to decrease with glyphosate treatment of couch and increase only when P. fluorescens was added. Soil-borne microflora in fields containing glyphosate-sprayed couch may affect expression of take-all in subsequent wheat.
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Claims 3
Claim · model-written summary
Glyphosate increased Ggt inoculum in couch grass, whether or not M. bolleyi was added.
- Taxon
- couch grasst0
- Treatment
- glyphosatee1
- Interactor
- Ggte1pathogen
- Second interactor
- M. bolleyiMicrodochium bolleyie1symbiont
- Outcome
- Ggt inoculume1
- Direction
- increasede1
- Qualifier
- irrespective of whether M. bolleyi was added to the potting mediume1
Not reportedComparator
Verbatim
t0“Influence of glyphosate herbicide treatment of couch grass on take-all”
e1“In Experiment 1, glyphosate increased Ggt inoculum in couch, irrespective of whether M. bolleyi was added to the potting medium”
Claim · model-written summary
Glyphosate treatment of couch tended to decrease take-all severity and Ggt DNA in the roots of accompanying wheat.
- Taxon
- wheat
Triticum aestivume2 - Treatment
- glyphosate treatment of couche2
- Interactor
- Ggte2pathogen
- Outcome
- take-all severity and Ggt DNA concentration in rootse2
- Direction
- tended to decreasee2
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Influence of glyphosate herbicide treatment of couch grass on take-all”
e2“In Experiment 2, take-all severity and Ggt DNA concentration in roots of the accompanying wheat plants tended to decrease with glyphosate treatment of couch and increase only when P. fluorescens was added”
Claim · model-written summary
Take-all severity increased in wheat only when P. fluorescens was added after glyphosate treatment of couch.
- Taxon
- wheatTriticum aestivume2
- Treatment
- P. fluorescense2
- Interactor
- Ggte2pathogen
- Second interactor
- P. fluorescens
.JPG?width=60)
Pseudomonas fluorescense2other - Outcome
- take-all severitye2
- Direction
- increasee2
- Qualifier
- only when P. fluorescens was addede2
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
.JPG?width=500)
Verbatim
t0“Influence of glyphosate herbicide treatment of couch grass on take-all”
e2“In Experiment 2, take-all severity and Ggt DNA concentration in roots of the accompanying wheat plants tended to decrease with glyphosate treatment of couch and increase only when P. fluorescens was added”
The same questions in other papers
Pseudomonas fluorescens · disease · Triticum aestivum (wheat)Positive and negative results
4 in the opposite direction
- positive
- positive
- positive
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See all 5 papers →glyphosate · disease · Triticum aestivum (wheat)Positive and negative results
7 papers in the same direction as this paper · 5 in the opposite direction
- no effect
- negative
- no effect
9 papers more in this group
See all 13 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.