Abstract
Myzus persicae (green peach aphid) feeding on Arabidopsis thaliana induces a defence response, quantified as reduced aphid progeny production, in infested leaves but not in other parts of the plant. Similarly, infiltration of aphid saliva into Arabidopsis leaves causes only a local increase in aphid resistance. Further characterization of the defence-eliciting salivary components indicates that Arabidopsis recognizes a proteinaceous elicitor with a size between 3 and 10 kD. Genetic analysis using well-characterized Arabidopsis mutants shows that saliva-induced resistance against M. persicae is independent of the known defence signalling pathways involving salicylic acid, jasmonate and ethylene. Among 78 Arabidopsis genes that were induced by aphid saliva infiltration, 52 had been identified previously as aphid-induced, but few are responsive to the well-known plant defence signalling molecules salicylic acid and jasmonate. Quantitative PCR analyses confirm expression of saliva-induced genes. In particular, expression of a set of O-methyltransferases, which may be involved in the synthesis of aphid-repellent glucosinolates, was significantly up-regulated by both M. persicae feeding and treatment with aphid saliva. However, this did not correlate with increased production of 4-methoxyindol-3-ylmethylglucosinolate, suggesting that aphid salivary components trigger an Arabidopsis defence response that is independent of this aphid-deterrent glucosinolate.
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Claims 9
Claim · model-written summary
Aphid feeding reduced progeny production locally in infested Arabidopsis leaves.
- Taxon
- Arabidopsis thaliana
Arabidopsis thalianae0 - Organ / stage
- infested leavese0
- Interactor
- Myzus persicae
Myzus persicaee0pest - Outcome
- aphid progeny productione0
- Direction
- reducede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Myzus persicae (green peach aphid) feeding on Arabidopsis thaliana induces a defence response, quantified as reduced aphid progeny production, in infested leaves but not in other parts of the plant.”
Claim · model-written summary
Aphid saliva infiltration increased aphid resistance only locally.
- Taxon
- ArabidopsisArabidopsise0
- Organ / stage
- leavese0
- Treatment
- infiltration of aphid salivae0
- Interactor
- aphide0pest
- Outcome
- aphid resistancee0
- Direction
- increasee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“infiltration of aphid saliva into Arabidopsis leaves causes only a local increase in aphid resistance”
Claim · model-written summary
Arabidopsis recognizes a proteinaceous saliva elicitor of 3 to 10 kD.
- Taxon
- ArabidopsisArabidopsise0
- Outcome
- recognizes a proteinaceous elicitore0
- Value
- between 3 and 10 kDe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Arabidopsis recognizes a proteinaceous elicitor with a size between 3 and 10 kD”
Claim · model-written summary
Saliva-induced resistance to M. persicae was independent of known salicylic acid, jasmonate and ethylene signalling pathways.
- Taxon
- ArabidopsisArabidopsist0
- Interactor
- M. persicaeMyzus persicaee0pest
- Outcome
- saliva-induced resistancee0
- Qualifier
- independent of the known defence signalling pathways involving salicylic acid, jasmonate and ethylenee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“saliva-induced resistance against M. persicae is independent of the known defence signalling pathways involving salicylic acid, jasmonate and ethylene”
t0“Arabidopsis thaliana”
Claim · model-written summary
Of 78 saliva-induced Arabidopsis genes, 52 had previously been identified as aphid-induced.
- Taxon
- ArabidopsisArabidopsise0
- Interactor
- aphide0pest
- Outcome
- genes that were induced by aphid saliva infiltratione0
- Value
- 52e0
- Qualifier
- Among 78 Arabidopsis genese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Among 78 Arabidopsis genes that were induced by aphid saliva infiltration, 52 had been identified previously as aphid-induced”
Claim · model-written summary
Few saliva-induced genes responded to salicylic acid and jasmonate.
- Taxon
- ArabidopsisArabidopsist0
- Outcome
- responsive to the well-known plant defence signalling molecules salicylic acid and jasmonatee0
- Qualifier
- fewe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“few are responsive to the well-known plant defence signalling molecules salicylic acid and jasmonate”
t0“Arabidopsis thaliana”
Claim · model-written summary
Quantitative PCR confirmed expression of saliva-induced genes.
- Taxon
- ArabidopsisArabidopsist0
- Outcome
- expression of saliva-induced genese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Quantitative PCR analyses confirm expression of saliva-induced genes”
t0“Arabidopsis thaliana”
Claim · model-written summary
A set of O-methyltransferases was significantly up-regulated by aphid feeding and saliva treatment.
- Taxon
- ArabidopsisArabidopsist0
- Treatment
- M. persicae feeding and treatment with aphid salivae0
- Interactor
- M. persicaeMyzus persicaee0pest
- Gene
- O-methyltransferasese0
- Outcome
- expression of a set of O-methyltransferasese0
- Direction
- up-regulatede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“expression of a set of O-methyltransferases, which may be involved in the synthesis of aphid-repellent glucosinolates, was significantly up-regulated by both M. persicae feeding and treatment with aphid saliva”
t0“Arabidopsis thaliana”
Claim · model-written summary
O-methyltransferase expression did not correlate with increased 4-methoxyindol-3-ylmethylglucosinolate production.
- Taxon
- ArabidopsisArabidopsist0
- Compound
- 4-methoxyindol-3-ylmethylglucosinolatee0
- Outcome
- production of 4-methoxyindol-3-ylmethylglucosinolatee0
- Direction
- increasede0
- Qualifier
- did not correlatee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“this did not correlate with increased production of 4-methoxyindol-3-ylmethylglucosinolate”
t0“Arabidopsis thaliana”
The same questions in other papers
infection · molecular: expression · ArabidopsisPositive and negative results
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See all 28 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.