Abstract
The control of Asian Soybean Rust (ASR), caused by Phakopsora pachyrhizi, has been difficult due to the aggressiveness of the pathogen and the lack of resistant cultivars. The objective of this study was to evaluate the effects of spray of potassium silicate (PS) and soil amendment with calcium silicate (CS) on soybean resistance to ASR. The PS solution was sprayed to leaves 24 hours prior to fungal inoculation while CS was amended to the soil at thirty-five days before sowing. The infection process of P. pachyrhizi was investigated by scanning electron microscopy. The uredia on leaves of plants sprayed with PS were smaller and more compact than those observed on the leaves of plants grown in soil amended with CS or in soil non-amended with CS (control treatment). On leaves of plants from the control treatment, uredia produced many urediniospores at 9 days after inoculation, and the ASR severity was 15, 8 and 9%, respectively, for plants from control, PS and CS treatments. In conclusion, the spray of PS contributed to reduce the number of uredia per cm² of leaf area and both PS spray and CS resulted in lower ASR symptoms.
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Claims 5
Claim · model-written summary
Uredia on plants sprayed with PS were smaller and more compact than on control plants.
- Taxon
- soybean
Glycine maxt0 - Treatment
- sprayed with PSe2
- Interactor
- Phakopsora pachyrhiziPhakopsora pachyrhizit0pathogen
- Outcome
- urediae2
- Direction
- smaller and more compacte2
- Comparator
- soil non-amended with CS (control treatment)e2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Potassium silicate and calcium silicate on the resistance of soybean to Phakopsora pachyrhizi infection”
e2“The uredia on leaves of plants sprayed with PS were smaller and more compact than those observed on the leaves of plants grown in soil amended with CS or in soil non-amended with CS (control treatment)”
Claim · model-written summary
Spray of PS reduced the number of uredia per cm² of leaf area.
- Taxon
- soybeanGlycine maxt0
- Treatment
- spray of PSe3
- Interactor
- Phakopsora pachyrhiziPhakopsora pachyrhizit0pathogen
- Outcome
- number of uredia per cm² of leaf areae3
- Direction
- reducee3
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Potassium silicate and calcium silicate on the resistance of soybean to Phakopsora pachyrhizi infection”
e3“the spray of PS contributed to reduce the number of uredia per cm² of leaf area”
Claim · model-written summary
PS spray lowered ASR symptoms compared with control.
- Taxon
- soybeanGlycine maxt0
- Treatment
- PS spraye4
- Interactor
- Phakopsora pachyrhiziPhakopsora pachyrhizit0pathogen
- Outcome
- ASR symptomse4
- Direction
- lowere4
- Qualifier
- ASR severity was 15, 8 and 9%, respectively, for plants from control, PS and CS treatmentse5
- Comparator
- controle5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Potassium silicate and calcium silicate on the resistance of soybean to Phakopsora pachyrhizi infection”
e4“both PS spray and CS resulted in lower ASR symptoms”
e5“the ASR severity was 15, 8 and 9%, respectively, for plants from control, PS and CS treatments”
Claim · model-written summary
Soil amendment with calcium silicate lowered ASR symptoms compared with control.
- Taxon
- soybeanGlycine maxt0
- Treatment
- soil amendment with calcium silicate (CS)e1
- Interactor
- Phakopsora pachyrhiziPhakopsora pachyrhizit0pathogen
- Outcome
- ASR symptomse4
- Direction
- lowere4
- Qualifier
- ASR severity was 15, 8 and 9%, respectively, for plants from control, PS and CS treatmentse5
- Comparator
- controle5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Potassium silicate and calcium silicate on the resistance of soybean to Phakopsora pachyrhizi infection”
e1“The objective of this study was to evaluate the effects of spray of potassium silicate (PS) and soil amendment with calcium silicate (CS) on soybean resistance to ASR”
e4“both PS spray and CS resulted in lower ASR symptoms”
e5“the ASR severity was 15, 8 and 9%, respectively, for plants from control, PS and CS treatments”
Claim · model-written summary
On control plants, uredia produced many urediniospores at 9 days after inoculation.
- Taxon
- soybeanGlycine maxt0
- Interactor
- Phakopsora pachyrhiziPhakopsora pachyrhizit0pathogen
- Outcome
- many urediniosporese6
- Qualifier
- at 9 days after inoculatione6
- Comparator
- control treatmente6
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Potassium silicate and calcium silicate on the resistance of soybean to Phakopsora pachyrhizi infection”
e6“On leaves of plants from the control treatment, uredia produced many urediniospores at 9 days after inoculation”
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potassium · Phakopsora pachyrhizi · Glycine max (soybean)Results agree
1 paper in the same direction as this paper
- positive
application · Phakopsora pachyrhizi · Glycine max (soybean)Results agree
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- positive
- positive
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2 papers more in this group
See all 6 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.