Abstract
Systemic acquired resistance (SAR) is a broad-spectrum resistance mechanism in plants that is activated in naive organs after exposure of another organ to a necrotizing pathogen. The organs manifesting SAR exhibit an increase in levels of salicylic acid (SA) and expression of the PATHOGENESIS-RELATED1 (PR1) gene. SA signaling is required for the manifestation of SAR. We demonstrate here that the Arabidopsis thaliana suppressor of fatty acid desaturase deficiency1 (sfd1) mutation compromises the SAR-conferred enhanced resistance to Pseudomonas syringae pv maculicola. In addition, the sfd1 mutation diminished the SAR-associated accumulation of elevated levels of SA and PR1 gene transcript in the distal leaves of plants previously exposed to an avirulent pathogen. However, the basal resistance to virulent and avirulent strains of P. syringae and the accumulation of elevated levels of SA and PR1 gene transcript in the pathogen-inoculated leaves of sfd1 were not compromised. Furthermore, the application of the SA functional analog benzothiadiazole enhanced disease resistance in the sfd1 mutant plants. SFD1 encodes a putative dihydroxyacetone phosphate (DHAP) reductase, which complemented the glycerol-3-phosphate auxotrophy of the DHAP reductase-deficient Escherichia coli gpsA mutant. Plastid glycerolipid composition was altered in the sfd1 mutant plant, suggesting that SFD1 is involved in lipid metabolism and that an SFD1 product lipid(s) is important for the activation of SAR.
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Claims 9
Claim · model-written summary
The sfd1 mutation compromised systemic acquired resistance to Pseudomonas syringae pv maculicola.
- Taxon
- Arabidopsis thaliana
Arabidopsis thalianae0 - Material
- sfd1e0
- Interactor
- Pseudomonas syringae pv maculicola
Pseudomonas syringaee0pathogen - Gene
- suppressor of fatty acid desaturase deficiency1e0
- Outcome
- SAR-conferred enhanced resistance to Pseudomonas syringae pv maculicolae0
- Direction
- compromisese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the Arabidopsis thaliana suppressor of fatty acid desaturase deficiency1 (sfd1) mutation compromises the SAR-conferred enhanced resistance to Pseudomonas syringae pv maculicola”
Claim · model-written summary
The sfd1 mutation reduced distal-leaf accumulation of salicylic acid and PR1 transcript after exposure to an avirulent pathogen.
- Taxon
- Arabidopsis thalianaArabidopsis thalianat0
- Material
- sfd1e0
- Organ / stage
- distal leavese0
- Interactor
- an avirulent pathogene0pathogen
- Gene
- PR1e0
- Outcome
- accumulation of elevated levels of SA and PR1 gene transcripte0
- Direction
- diminishede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the sfd1 mutation diminished the SAR-associated accumulation of elevated levels of SA and PR1 gene transcript in the distal leaves of plants previously exposed to an avirulent pathogen”
t0“Arabidopsis thaliana”
Claim · model-written summary
The sfd1 mutation did not compromise basal resistance to virulent and avirulent P. syringae.
- Taxon
- Arabidopsis thalianaArabidopsis thalianat0
- Material
- sfd1e0
- Interactor
- P. syringaePseudomonas syringaee0pathogen
- Outcome
- basal resistance to virulent and avirulent strains of P. syringaee0
- Direction
- not compromisede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the basal resistance to virulent and avirulent strains of P. syringae and the accumulation of elevated levels of SA and PR1 gene transcript in the pathogen-inoculated leaves of sfd1 were not compromised”
t0“Arabidopsis thaliana”
Claim · model-written summary
The sfd1 mutation did not compromise salicylic acid and PR1 transcript accumulation in inoculated leaves.
- Taxon
- Arabidopsis thalianaArabidopsis thalianat0
- Material
- sfd1e0
- Organ / stage
- pathogen-inoculated leavese0
- Interactor
- P. syringaePseudomonas syringaee0pathogen
- Gene
- PR1e0
- Outcome
- accumulation of elevated levels of SA and PR1 gene transcripte0
- Direction
- not compromisede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the basal resistance to virulent and avirulent strains of P. syringae and the accumulation of elevated levels of SA and PR1 gene transcript in the pathogen-inoculated leaves of sfd1 were not compromised”
t0“Arabidopsis thaliana”
Claim · model-written summary
Benzothiadiazole application enhanced disease resistance in sfd1 plants.
- Taxon
- Arabidopsis thalianaArabidopsis thalianat0
- Material
- sfd1e0
- Treatment
- application of the SA functional analog benzothiadiazolee0
- Outcome
- disease resistancee0
- Direction
- enhancede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the application of the SA functional analog benzothiadiazole enhanced disease resistance in the sfd1 mutant plants”
t0“Arabidopsis thaliana”
Claim · model-written summary
SFD1 encodes a putative dihydroxyacetone phosphate reductase.
- Taxon
- Arabidopsis thalianaArabidopsis thalianat0
- Gene
- SFD1e0
- Outcome
- putative dihydroxyacetone phosphate (DHAP) reductasee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“SFD1 encodes a putative dihydroxyacetone phosphate (DHAP) reductase”
t0“Arabidopsis thaliana”
Claim · model-written summary
SFD1 complemented glycerol-3-phosphate auxotrophy in an E. coli gpsA mutant.
- Taxon
- Arabidopsis thalianaArabidopsis thalianat0
- Treatment
- SFD1e1
- Gene
- SFD1e1
- Outcome
- glycerol-3-phosphate auxotrophy of the DHAP reductase-deficient Escherichia coli gpsA mutante0
- Direction
- complementede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“which complemented the glycerol-3-phosphate auxotrophy of the DHAP reductase-deficient Escherichia coli gpsA mutant”
e1“SFD1 encodes a putative dihydroxyacetone phosphate (DHAP) reductase, which complemented”
t0“Arabidopsis thaliana”
Claim · model-written summary
Plastid glycerolipid composition was altered in sfd1 plants.
- Taxon
- Arabidopsis thalianaArabidopsis thalianat0
- Material
- sfd1e0
- Outcome
- Plastid glycerolipid compositione0
- Direction
- alterede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Plastid glycerolipid composition was altered in the sfd1 mutant plant”
t0“Arabidopsis thaliana”
Claim · model-written summary
The authors infer that SFD1 participates in lipid metabolism and an SFD1-derived lipid matters for SAR activation.
- Taxon
- Arabidopsis thalianaArabidopsis thalianat0
- Gene
- SFD1e0
- Outcome
- activation of SARe0
- Qualifier
- SFD1 product lipid(s)e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“suggesting that SFD1 is involved in lipid metabolism and that an SFD1 product lipid(s) is important for the activation of SAR”
t0“Arabidopsis thaliana”
The same questions in other papers
salicylic acid · disease · Arabidopsis thaliana (thale cress)Positive and negative results
10 papers in the same direction as this paper · 5 in the opposite direction
- no effect
- negative
- negative
12 papers more in this group
See all 16 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.