Abstract
BACKGROUND: Recent studies have shown the effects of glyphosate drift on decreasing rust intensity on Eucalyptus grandis plants. However, the effects of the herbicide on Puccinia psidii initial development are unknown. In this study the systemic action of glyphosate on rust severity was evaluated on Eucalyptus plants maintained under greenhouse conditions. Urediniospore germination and apressorium formation on detached leaves and on water agar medium, previously treated with glyphosate, were also evaluated. RESULTS: Rust severity and the number of urediniospores per leaf area were significantly reduced with increasing glyphosate doses, even on branches not directly treated with the herbicide, indicating a systemic effect of glyphosate on pathogen development. Similarly, higher glyphosate doses also reduced germination and apressorium formation on detached Eucalyptus leaves, regardless of the direct application of the product on the leaf limb or on the petiole base. Puccinia psidii urediniospore germination in water agar medium also decreased with increasing herbicide doses. CONCLUSIONS: Reductions in germination and apressorium formation of P. psidii urediniospores with increasing glyphosate dose indicate that a lower severity and intensity of the disease may perhaps be due to blockage of the shikimic acid pathway in the fungal metabolic system.
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Claims 5
Claim · model-written summary
Rust severity declined significantly with glyphosate dose, including on untreated branches.
- Taxon
- Eucalyptus grandis
Eucalyptus grandist0 - Treatment
- increasing glyphosate dosese0
- Interactor
- Puccinia psidiit0pathogen
- Outcome
- Rust severitye0
- Direction
- reducede0
- Qualifier
- even on branches not directly treated with the herbicidee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Rust severity and the number of urediniospores per leaf area were significantly reduced with increasing glyphosate doses, even on branches not directly treated with the herbicide”
t0“Puccinia psidii disease severity on Eucalyptus grandis”
Claim · model-written summary
Urediniospores per leaf area declined significantly with glyphosate dose.
- Taxon
- Eucalyptus grandisEucalyptus grandist0
- Treatment
- increasing glyphosate dosese0
- Interactor
- Puccinia psidiit0pathogen
- Outcome
- number of urediniospores per leaf areae0
- Direction
- reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Rust severity and the number of urediniospores per leaf area were significantly reduced with increasing glyphosate doses”
t0“Puccinia psidii disease severity on Eucalyptus grandis”
Claim · model-written summary
Higher glyphosate doses reduced urediniospore germination on detached leaves.
- Taxon
- Eucalyptus
.jpg?width=60)
Eucalyptuse0 - Treatment
- higher glyphosate dosese0
- Interactor
- Puccinia psidiit0pathogen
- Outcome
- germinatione0
- Direction
- reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
.jpg?width=500)
Verbatim
e0“higher glyphosate doses also reduced germination and apressorium formation on detached Eucalyptus leaves”
t0“Puccinia psidii disease severity on Eucalyptus grandis”
Claim · model-written summary
Higher glyphosate doses reduced appressorium formation on detached leaves.
- Taxon
- EucalyptusEucalyptuse0
- Treatment
- higher glyphosate dosese0
- Interactor
- Puccinia psidiit0pathogen
- Outcome
- apressorium formatione0
- Direction
- reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“higher glyphosate doses also reduced germination and apressorium formation on detached Eucalyptus leaves”
t0“Puccinia psidii disease severity on Eucalyptus grandis”
Claim · model-written summary
Puccinia spore germination on water agar declined with herbicide dose.
- Taxon
- Eucalyptus grandisEucalyptus grandist0
- Treatment
- increasing herbicide dosese0
- Interactor
- Puccinia psidiie0pathogen
- Outcome
- Puccinia psidii urediniospore germinatione0
- Direction
- decreasede0
- Setting
- water agar mediume0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Puccinia psidii urediniospore germination in water agar medium also decreased with increasing herbicide doses”
t0“Puccinia psidii disease severity on Eucalyptus grandis”
The same questions in other papers
glyphosate · growth · EucalyptusResults differ
2 papers in the same direction as this paper · 1 in the opposite direction
- negative
- positive
- positive
glyphosate · growth · Eucalyptus grandis (rose gum)Results agree
1 paper in the same direction as this paper
- positive
herbicide · growth · Eucalyptus grandis (rose gum)Positive and negative results
1 paper in the same direction as this paper · 1 in the opposite direction
- negative
- positive
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.