Abstract
The influence of foliar glandular trichomes on developmental biology of the potato leafhopper, Empoasca fabae (Harris) (Homoptera: Cicadellidae), was examined by selective removal of trichomes on resistant and susceptible potato germplasm comprising two glandular trichome-bearing genotypes (PI 473331 and PI 473334) of wild potato, Solanum berthaultii (Hawkes), two interspecific hybrids of S. berthaultii with Solanum tuberosum L. (Q174-2 and NY123), and two commercial S. tuberosum cultivars (‘Elba’ and ‘Allegany’). Adult mortality was affected, whereas nymphal emergence was unaffected by removal of glandular trichome exudates. No nymphs were observed emerging from leaves of PI 473331 or PI 473334. Regardless of the trichome removal treatment, no nymphs completed development on PI 473331, and only a small percentage of nymphs survived to adulthood on NY123 and PI 473334. PI 473331 had the greatest frequency of adults and nymphs with trichome exudate deposition on their bodies, followed by PI 473334. Nymphs, but not adults, had exudate accumulation when caged on foliage of Q174-2. Removal of type A trichome heads and type B droplets eliminated exudate deposition. The results of these studies provide evidence that phenolic oxidation chemistry and the physical barrier imposed by trichomes of S. berthaultii are responsible for much of the observed resistance but that other factors possibly linked to the presence of trichomes aid in the expression on resistance.
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Claims 10
Claim · model-written summary
Removing glandular trichome exudates affected adult leafhopper mortality.
- Taxon
- potato
Solanum tuberosume1 - Treatment
- removal of glandular trichome exudatese0
- Interactor
- leafhoppere1pest
- Outcome
- Adult mortalitye0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Adult mortality was affected, whereas nymphal emergence was unaffected by removal of glandular trichome exudates.”
e1“the potato leafhopper”
Claim · model-written summary
Removing glandular trichome exudates did not affect nymphal emergence.
- Taxon
- potatoSolanum tuberosume1
- Treatment
- removal of glandular trichome exudatese0
- Interactor
- leafhoppere1pest
- Outcome
- nymphal emergencee0
- Direction
- unaffectede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Adult mortality was affected, whereas nymphal emergence was unaffected by removal of glandular trichome exudates.”
e1“the potato leafhopper”
Claim · model-written summary
No leafhopper nymphs emerged from PI 473331 or PI 473334 leaves.
- Taxon
- Solanum berthaultiiSolanum berthaultiit0
- Material
- PI 473331 or PI 473334e0
- Outcome
- No nymphs were observed emerginge0
Verbatim
e0“No nymphs were observed emerging from leaves of PI 473331 or PI 473334.”
t0“Solanum berthaultii”
Claim · model-written summary
No nymphs completed development on PI 473331 regardless of trichome removal.
- Taxon
- Solanum berthaultiiSolanum berthaultiit0
- Material
- PI 473331e0
- Treatment
- trichome removal treatmente0
- Outcome
- no nymphs completed developmente0
Verbatim
e0“Regardless of the trichome removal treatment, no nymphs completed development on PI 473331”
t0“Solanum berthaultii”
Claim · model-written summary
Only a small percentage of nymphs survived to adulthood on NY123.
- Taxon
- Solanum tuberosumSolanum tuberosumt0
- Material
- NY123e0
- Outcome
- nymphs survived to adulthoode0
- Value
- a small percentagee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“only a small percentage of nymphs survived to adulthood on NY123 and PI 473334”
t0“Solanum tuberosum”
Claim · model-written summary
Only a small percentage of nymphs survived to adulthood on PI 473334.
- Taxon
- Solanum berthaultiiSolanum berthaultiit0
- Material
- PI 473334e0
- Outcome
- nymphs survived to adulthoode0
- Value
- a small percentagee0
Verbatim
e0“only a small percentage of nymphs survived to adulthood on NY123 and PI 473334”
t0“Solanum berthaultii”
Claim · model-written summary
PI 473331 had the greatest frequency of adults and nymphs with exudate deposition, followed by PI 473334.
Verbatim
e0“PI 473331 had the greatest frequency of adults and nymphs with trichome exudate deposition on their bodies, followed by PI 473334.”
t0“Solanum berthaultii”
Claim · model-written summary
Nymphs accumulated exudate on Q174-2 foliage, while adults did not.
- Taxon
- Solanum tuberosumSolanum tuberosumt0
- Material
- Q174-2e0
- Outcome
- Nymphs, but not adults, had exudate accumulatione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Nymphs, but not adults, had exudate accumulation when caged on foliage of Q174-2.”
t0“Solanum tuberosum”
Claim · model-written summary
Removing type A trichome heads and type B droplets eliminated exudate deposition.
- Taxon
- Solanum berthaultiiSolanum berthaultiit0
- Treatment
- Removal of type A trichome heads and type B dropletse0
- Outcome
- exudate depositione0
- Direction
- eliminatede0
Not reportedComparator
Verbatim
e0“Removal of type A trichome heads and type B droplets eliminated exudate deposition.”
t0“Solanum berthaultii”
Claim · model-written summary
The authors attribute much resistance to phenolic oxidation and the physical barrier of S. berthaultii trichomes, with possible additional trichome-linked factors.
- Taxon
- S. berthaultiiSolanum berthaultiie0
- Outcome
- observed resistancee0
- Qualifier
- phenolic oxidation chemistry and the physical barrier imposed by trichomese0
Verbatim
e0“phenolic oxidation chemistry and the physical barrier imposed by trichomes of S. berthaultii are responsible for much of the observed resistance but that other factors possibly linked to the presence of trichomes aid in the expression on resistance”
The same questions in other papers
allelopathy · growth · Solanum tuberosum (potato)Positive and negative results
1 in the opposite direction
- 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.