Abstract
Tomato plants 21 days old were inoculated with Agrobacterium tumefaciens, the causative organism of crown gall, and 72 h later [3- 14 C]cinnamic or [carboxyl- 14 C]benzoic acid was administered by wick-feeding to these and to uninfected control plants. After a further 48 h both groups were examined for incorporation of label into phenolic acids. The pattern of incorporation into bound phenolic acids of the controls was in accord with biosynthetic pathways previously demonstrated in normal plants, but qualitative and quantitative divergence from this pattern was observed in the bound phenolic acids of the infected plants. The data suggest interference by the pathogen with β-oxidation of at least two phenylpropanoid acids of the lignification pathway. In infected plants, lowered incorporation of 14 C from cinnamic acid into phenylpropanoid acids of the lignification pathway and their β-oxidation products was accompanied by the appearance of labelled o-coumaric acid, consistent with some diversion of cinnamic acid metabolism toward ortho-hydroxylation. Incorporation of 14 C from benzoic acid into gentisic and especially salicylic acid of infected plants was much lower than in the controls.
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Claims 6
Claim · model-written summary
Infected tomato plants differed qualitatively and quantitatively in bound phenolic acid labeling from controls.
- Taxon
- Tomato plants
Solanum lycopersicumt0 - Treatment
- infected plantse0
- Outcome
- bound phenolic acidse0
- Direction
- divergencee0
Not reportedInteractorInteractor roleComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“qualitative and quantitative divergence from this pattern was observed in the bound phenolic acids of the infected plants.”
t0“Tomato plants”
Claim · model-written summary
The data suggest pathogen interference with beta oxidation in the lignification pathway.
- Taxon
- Tomato plantsSolanum lycopersicumt0
- Outcome
- β-oxidation of at least two phenylpropanoid acidse0
- Qualifier
- interference by the pathogene0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The data suggest interference by the pathogen with β-oxidation of at least two phenylpropanoid acids of the lignification pathway.”
t0“Tomato plants”
Claim · model-written summary
Infection lowered incorporation of cinnamic acid label into phenylpropanoid acids and their beta oxidation products.
- Taxon
- Tomato plantsSolanum lycopersicumt0
- Treatment
- infected plantse0
- Outcome
- incorporation of 14 C from cinnamic acid into phenylpropanoid acids of the lignification pathway and their β-oxidation productse0
- Direction
- lowerede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In infected plants, lowered incorporation of 14 C from cinnamic acid into phenylpropanoid acids of the lignification pathway and their β-oxidation products”
t0“Tomato plants”
Claim · model-written summary
Labeled o-coumaric acid appeared in infected plants.
- Taxon
- Tomato plantsSolanum lycopersicumt0
- Outcome
- appearance of labelled o-coumaric acide0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“was accompanied by the appearance of labelled o-coumaric acid”
t0“Tomato plants”
Claim · model-written summary
Infection lowered benzoic acid label incorporation into gentisic acid relative to controls.
- Taxon
- Tomato plantsSolanum lycopersicumt0
- Treatment
- infected plantse0
- Outcome
- Incorporation of 14 C from benzoic acid into gentisice0
- Direction
- much lowere0
- Comparator
- the controlse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Incorporation of 14 C from benzoic acid into gentisic and especially salicylic acid of infected plants was much lower than in the controls.”
t0“Tomato plants”
Claim · model-written summary
Infection especially lowered benzoic acid label incorporation into salicylic acid relative to controls.
- Taxon
- Tomato plantsSolanum lycopersicumt0
- Treatment
- infected plantse0
- Outcome
- salicylic acide0
- Direction
- much lowere0
- Comparator
- the controlse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Incorporation of 14 C from benzoic acid into gentisic and especially salicylic acid of infected plants was much lower than in the controls.”
t0“Tomato plants”
The same questions in other papers
infection · molecular: metabolites · Solanum lycopersicum (tomato)Positive and negative results
17 papers in the same direction as this paper · 15 in the opposite direction
- positive
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See all 33 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.