Abstract
When the lower leaves of young potato plants (cv. Bintje) were treated with an aqueous suspension of the polyunsaturated fatty acid arachidonic acid (AA), a threefold increase in the amount of free salicylic acid (SA) in the treated leaves was observed 3 h after treatment. The highest level of free SA was measured 6 h after treatment, reaching 3.21 g/g fresh weight compared to 0.15 g/g fresh weight in controls. The levels of conjugated SA in the treated leaves increased up to 51 g/g fresh weight 3 days after treatment compared to 0.83 g/g fresh weight in controls. Four days after treatment with AA the upper leaves became resistant to the potato late blight pathogen, Phytophthora infestans, but no accumulation of SA was observed. This systemic protection was observed in plants treated with AA at concentrations as low as 10 ppm and is unlikely to have arisen from AA translocated in the plant. In addition, treatment with AA protected potato plants against the early blight pathogen, Alternaria solani, indicating a broader spectrum of protection. Local but not systemic accumulation of a pathogenesis-related (PR)1-like protein was observed 24 h after treatment with AA. Application of SA on potato leaves did not confer resistance against P. infestans, but a local accumulation of a PR1-like protein was observed 24 h after treatment. Younger leaves of healthy susceptible and resistant potato plants contained higher levels of SA than older leaves, and this gradient correlated with their natural resistance to P. infestans. In general, cultivars showing field resistance contained higher amounts of conjugated SA than did susceptible cultivars.
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Claims 14
Claim · model-written summary
Treating the lower leaves of young potato plants (cv. Bintje) with arachidonic acid caused a threefold increase in free salicylic acid in the treated leaves 3 h after treatment.
- Taxon
- potato
Solanum tuberosume1 - Material
- Bintjee1
- Organ / stage
- treated leavese1
- Treatment
- aqueous suspension of the polyunsaturated fatty acid arachidonic acid (AA)e1
- Outcome
- amount of free salicylic acid (SA)e1
- Direction
- increasee1
- Value
- threefolde1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“young potato plants (cv. Bintje) were treated with an aqueous suspension of the polyunsaturated fatty acid arachidonic acid (AA), a threefold increase in the amount of free salicylic acid (SA) in the treated leaves was observed 3 h after treatment”
Claim · model-written summary
Free SA in arachidonic acid-treated potato leaves peaked 6 h after treatment at 3.21 g/g fresh weight versus 0.15 g/g fresh weight in controls.
- Taxon
- Potato PlantsSolanum tuberosumt0
- Treatment
- Arachidonic Acidt1
- Outcome
- level of free SAe1
- Direction
- higheste1
- Value
- 3.21 g/g fresh weighte1
- Qualifier
- 0.15 g/g fresh weighte1
- Comparator
- controlse1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Potato Plants”
t1“Arachidonic Acid”
e1“The highest level of free SA was measured 6 h after treatment, reaching 3.21 g/g fresh weight compared to 0.15 g/g fresh weight in controls”
Claim · model-written summary
Conjugated SA in arachidonic acid-treated potato leaves increased up to 51 g/g fresh weight 3 days after treatment versus 0.83 g/g fresh weight in controls.
- Taxon
- Potato PlantsSolanum tuberosumt0
- Organ / stage
- treated leavese1
- Treatment
- Arachidonic Acidt1
- Outcome
- levels of conjugated SAe1
- Direction
- increasede1
- Value
- 51 g/g fresh weighte1
- Qualifier
- 0.83 g/g fresh weighte1
- Comparator
- controlse1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Potato Plants”
t1“Arachidonic Acid”
e1“The levels of conjugated SA in the treated leaves increased up to 51 g/g fresh weight 3 days after treatment compared to 0.83 g/g fresh weight in controls”
Claim · model-written summary
Four days after arachidonic acid treatment, the upper leaves of potato plants became resistant to the late blight pathogen Phytophthora infestans.
- Taxon
- potatoSolanum tuberosume1
- Organ / stage
- upper leavese1
- Treatment
- treatment with AAe1
- Interactor
- Phytophthora infestans
Phytophthora infestanse1pathogen - Outcome
- upper leaves became resistant to the potato late blight pathogene1
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Four days after treatment with AA the upper leaves became resistant to the potato late blight pathogen, Phytophthora infestans, but no accumulation of SA was observed”
Claim · model-written summary
In the upper leaves, no accumulation of SA was observed four days after arachidonic acid treatment.
- Taxon
- potatoSolanum tuberosume1
- Organ / stage
- upper leavese1
- Treatment
- treatment with AAe1
- Outcome
- accumulation of SAe1
- Direction
- no accumulatione1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Four days after treatment with AA the upper leaves became resistant to the potato late blight pathogen, Phytophthora infestans, but no accumulation of SA was observed”
Claim · model-written summary
Systemic protection in potato plants was observed with arachidonic acid at concentrations as low as 10 ppm.
- Taxon
- Potato PlantsSolanum tuberosumt0
- Treatment
- AA at concentrations as low as 10 ppme1
- Outcome
- systemic protectione1
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Potato Plants”
e1“This systemic protection was observed in plants treated with AA at concentrations as low as 10 ppm and is unlikely to have arisen from AA translocated in the plant”
Claim · model-written summary
The systemic protection is unlikely to have arisen from arachidonic acid translocated in the plant.
- Taxon
- Potato PlantsSolanum tuberosumt0
- Treatment
- AAe1
- Outcome
- systemic protectione1
- Qualifier
- unlikely to have arisen from AA translocated in the plante1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Potato Plants”
e1“This systemic protection was observed in plants treated with AA at concentrations as low as 10 ppm and is unlikely to have arisen from AA translocated in the plant”
Claim · model-written summary
Arachidonic acid treatment protected potato plants against the early blight pathogen Alternaria solani.
- Taxon
- potatoSolanum tuberosume1
- Treatment
- AAe1
- Interactor
- Alternaria solani
Alternaria solanie1pathogen - Outcome
- protected potato plants against the early blight pathogene1
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“treatment with AA protected potato plants against the early blight pathogen, Alternaria solani”
Claim · model-written summary
Arachidonic acid treatment led to local but not systemic accumulation of a PR1-like protein 24 h after treatment in potato.
- Taxon
- Potato PlantsSolanum tuberosumt0
- Treatment
- AAe1
- Gene
- pathogenesis-related (PR)1-like proteine1
- Outcome
- accumulation of a pathogenesis-related (PR)1-like proteine1
- Direction
- Local but not systemice1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Potato Plants”
e1“Local but not systemic accumulation of a pathogenesis-related (PR)1-like protein was observed 24 h after treatment with AA”
Claim · model-written summary
Application of SA on potato leaves did not confer resistance against Phytophthora infestans.
- Taxon
- potatoSolanum tuberosume1
- Treatment
- Application of SAe1
- Interactor
- P. infestansPhytophthora infestanse1pathogen
- Outcome
- resistance against P. infestanse1
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Application of SA on potato leaves did not confer resistance against P. infestans, but a local accumulation of a PR1-like protein was observed 24 h after treatment”
Claim · model-written summary
Application of SA on potato leaves led to local accumulation of a PR1-like protein 24 h after treatment.
- Taxon
- potatoSolanum tuberosume1
- Treatment
- Application of SAe1
- Gene
- PR1-like proteine1
- Outcome
- PR1-like proteine1
- Direction
- local accumulatione1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Application of SA on potato leaves did not confer resistance against P. infestans, but a local accumulation of a PR1-like protein was observed 24 h after treatment”
Claim · model-written summary
Younger leaves of healthy susceptible and resistant potato plants contained higher SA levels than older leaves.
- Taxon
- potatoSolanum tuberosume1
- Organ / stage
- Younger leavese1
- Outcome
- levels of SAe1
- Direction
- highere1
- Comparator
- older leavese1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Younger leaves of healthy susceptible and resistant potato plants contained higher levels of SA than older leaves, and this gradient correlated with their natural resistance to P. infestans”
Claim · model-written summary
The SA gradient between younger and older leaves correlated with natural resistance of potato to P. infestans.
- Taxon
- potatoSolanum tuberosume1
- Interactor
- P. infestansPhytophthora infestanse1pathogen
- Compound
- SAe1
- Outcome
- natural resistance to P. infestanse1
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Younger leaves of healthy susceptible and resistant potato plants contained higher levels of SA than older leaves, and this gradient correlated with their natural resistance to P. infestans”
Claim · model-written summary
Potato cultivars showing field resistance contained higher amounts of conjugated SA than susceptible cultivars.
- Taxon
- Potato PlantsSolanum tuberosumt0
- Material
- cultivars showing field resistancee1
- Outcome
- amounts of conjugated SAe1
- Direction
- highere1
- Comparator
- susceptible cultivarse1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Potato Plants”
e1“cultivars showing field resistance contained higher amounts of conjugated SA than did susceptible cultivars”
The same questions in other papers
arachidonic acid · Phytophthora infestans · Solanum tuberosum (potato)Positive and negative results
1 in the opposite direction
- negative
salicylic acid · Phytophthora infestans · Solanum tuberosum (potato)Positive and negative results
1 paper in the same direction as this paper · 10 in the opposite direction
- positive
- positive
- positive
8 papers more in this group
See all 12 papers →arachidonic acid · physiology: hormones · Solanum tuberosum (potato)Results agree
1 paper in the same direction as this paper
- positive
arachidonic acid · molecular: metabolites · Solanum tuberosum (potato)Results agree
3 papers in the same direction as this paper
- positive
- positive
- 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.