Abstract
The tuber necrotic strain of Potato virus Y (PVY NTN ) causes widespread disease and has severe negative effects on the growth and yields of plants, especially those of the Solanaceae family. The consequences of residual toxicity and non-biodegradation of synthetic chemicals and pollution of the environment has led to investigations into new non-toxic and biological treatments to control plant viral diseases. Ethanolic extracts of Bowiea volubilis (bulbs), Cotyledon orbiculata (leaves), Gomphocarpus fruticosus (leaves), Merwilla plumbea (dry and fresh bulbs), Nerium oleander (leaves), and the fruits and leaves of Strophanthus speciosus, were evaluated against PVY NTN in vivo and in vitro. At a concentration of 20 mg ml -1 , ethanolic extracts of Strophanthus speciosus (leaves) and fruits (50 mg ml -1 ) significantly reduced the expression of PVY NTN symptoms on tobacco plants in vitro without affecting the normal growth and development of the plant. Similarly, at 50 mg ml -1 , N. oleander, C. orbiculata and B. volubilis (fresh bulbs) and S. speciousus leaves at 20 mg ml -1 extracts showed significant differences in PVY NTN symptoms in the in vivo experiment. Strophanthus speciosus leaf and fruit extracts showed significant inhibition in the in vitro and in vivo assays and demonstrated that S. speciosus has potential to be used as an antiphytoviral treatment.
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Claims 9
Claim · model-written summary
Ethanolic extract of Strophanthus speciosus leaves at 20 mg ml-1 significantly reduced PVY NTN symptom expression on tobacco in vitro.
- Taxon
- tobacco
Nicotiana tabacume0 - Treatment
- ethanolic extracts of Strophanthus speciosus (leaves)e0
- Interactor
- PVY NTNe0pathogen
- Outcome
- expression of PVY NTN symptomse0
- Direction
- reducede0
- Qualifier
- 20 mg ml -1e0
- Setting
- in vitroe0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“At a concentration of 20 mg ml -1 , ethanolic extracts of Strophanthus speciosus (leaves) and fruits (50 mg ml -1 ) significantly reduced the expression of PVY NTN symptoms on tobacco plants in vitro”
Claim · model-written summary
Ethanolic extract of Strophanthus speciosus fruits at 50 mg ml-1 significantly reduced PVY NTN symptom expression on tobacco in vitro.
- Taxon
- tobaccoNicotiana tabacume0
- Treatment
- fruits (50 mg ml -1 )e0
- Interactor
- PVY NTNe0pathogen
- Outcome
- expression of PVY NTN symptomse0
- Direction
- reducede0
- Setting
- in vitroe0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“At a concentration of 20 mg ml -1 , ethanolic extracts of Strophanthus speciosus (leaves) and fruits (50 mg ml -1 ) significantly reduced the expression of PVY NTN symptoms on tobacco plants in vitro”
Claim · model-written summary
The Strophanthus speciosus leaf and fruit extracts reduced symptoms without affecting normal growth and development of the tobacco plant.
- Taxon
- tobaccoNicotiana tabacume0
- Treatment
- ethanolic extracts of Strophanthus speciosus (leaves) and fruitse0
- Outcome
- normal growth and developmente0
- Direction
- without affectinge0
- Setting
- in vitroe0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“ethanolic extracts of Strophanthus speciosus (leaves) and fruits (50 mg ml -1 ) significantly reduced the expression of PVY NTN symptoms on tobacco plants in vitro without affecting the normal growth and development of the plant”
Claim · model-written summary
In vivo, N. oleander extract at 50 mg ml-1 gave significant differences in PVY NTN symptoms on tobacco.
- Taxon
- tobaccoNicotiana tabacumt0
- Treatment
- N. oleandere0
- Interactor
- PVY NTNe0pathogen
- Outcome
- PVY NTN symptomse0
- Qualifier
- 50 mg ml -1e0
- Setting
- in vivoe0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“at 50 mg ml -1 , N. oleander, C. orbiculata and B. volubilis (fresh bulbs) and S. speciousus leaves at 20 mg ml -1 extracts showed significant differences in PVY NTN symptoms in the in vivo experiment”
t0“on tobacco plants”
Claim · model-written summary
In vivo, C. orbiculata extract at 50 mg ml-1 gave significant differences in PVY NTN symptoms on tobacco.
- Taxon
- tobaccoNicotiana tabacumt0
- Treatment
- C. orbiculatae0
- Interactor
- PVY NTNe0pathogen
- Outcome
- PVY NTN symptomse0
- Qualifier
- 50 mg ml -1e0
- Setting
- in vivoe0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“at 50 mg ml -1 , N. oleander, C. orbiculata and B. volubilis (fresh bulbs) and S. speciousus leaves at 20 mg ml -1 extracts showed significant differences in PVY NTN symptoms in the in vivo experiment”
t0“on tobacco plants”
Claim · model-written summary
In vivo, B. volubilis fresh bulb extract at 50 mg ml-1 gave significant differences in PVY NTN symptoms on tobacco.
- Taxon
- tobaccoNicotiana tabacumt0
- Treatment
- B. volubilis (fresh bulbs)e0
- Interactor
- PVY NTNe0pathogen
- Outcome
- PVY NTN symptomse0
- Qualifier
- 50 mg ml -1e0
- Setting
- in vivoe0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“at 50 mg ml -1 , N. oleander, C. orbiculata and B. volubilis (fresh bulbs) and S. speciousus leaves at 20 mg ml -1 extracts showed significant differences in PVY NTN symptoms in the in vivo experiment”
t0“on tobacco plants”
Claim · model-written summary
In vivo, S. speciosus leaf extract at 20 mg ml-1 gave significant differences in PVY NTN symptoms on tobacco.
- Taxon
- tobaccoNicotiana tabacumt0
- Treatment
- S. speciousus leaves at 20 mg ml -1e0
- Interactor
- PVY NTNe0pathogen
- Outcome
- PVY NTN symptomse0
- Setting
- in vivoe0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“at 50 mg ml -1 , N. oleander, C. orbiculata and B. volubilis (fresh bulbs) and S. speciousus leaves at 20 mg ml -1 extracts showed significant differences in PVY NTN symptoms in the in vivo experiment”
t0“on tobacco plants”
Claim · model-written summary
Strophanthus speciosus leaf and fruit extracts showed significant inhibition in both in vitro and in vivo assays.
- Taxon
- tobaccoNicotiana tabacumt0
- Treatment
- Strophanthus speciosus leaf and fruit extractse0
- Outcome
- inhibitione0
- Direction
- inhibitione0
- Setting
- in vitro and in vivo assayse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Strophanthus speciosus leaf and fruit extracts showed significant inhibition in the in vitro and in vivo assays”
t0“on tobacco plants”
Claim · model-written summary
The authors conclude that S. speciosus has potential to be used as an antiphytoviral treatment.
- Taxon
- tobaccoNicotiana tabacumt0
- Treatment
- S. speciosuse0
- Outcome
- potential to be used as an antiphytoviral treatmente0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“demonstrated that S. speciosus has potential to be used as an antiphytoviral treatment”
t0“on tobacco plants”
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See all 5 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.