Abstract
Isoperoxidases were detected in resistant Rossol and susceptible Roma VF tomato roots uninfected and infected by Meloidogyne incognita. Syringaldazine, guaiacol, p-phenylenediamine-pyrocatechol (PPD-PC), and indoleacetic acid (IAA) were used as substrates, and the corresponding peroxidative activities were detected either in cytoplasmic or in cell wall fractions, except for IAA oxidase, which was measured in soluble and microsomal fractions. Isoperoxidase activities and cellular locations were induced differently in resistant and susceptible cultivars by nematodes. Nematode infestation markedly enhanced syringaldazine oxidase activity in cell walls of the resistant cultivar. This isoperoxidase is involved in the last step of lignin deposition in plants. Conversely, the susceptible cultivar reacted to M. incognita infection with an increase in cytoplasmic PPD-PC oxidase activity, which presumedly is involved in ethylene production; no changes in cell wall isoperoxidases were observed. IAA oxidase was inhibited in susceptible plants after nematode inoculation, whereas in resistant plants this activity increased in the soluble fraction and decreased in the microsomal fraction.
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Claims 8
Claim · model-written summary
Nematode infestation markedly enhanced syringaldazine oxidase activity in cell walls of the resistant tomato cultivar Rossol.
- Taxon
- Tomato
Solanum lycopersicumt0 - Material
- Rossole0
- Organ / stage
- cell wallse1
- Treatment
- Nematode infestatione1
- Interactor
- Meloidogyne incognita
_penetrates_a_tomato_root_-_USDA-ARS.jpg?width=60)
Meloidogyne incognitae0pest - Outcome
- syringaldazine oxidase activity in cell wallse1
- Direction
- enhancede1
- Comparator
- uninfectede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
_penetrates_a_tomato_root_-_USDA-ARS.jpg?width=500)
Verbatim
t0“Tomato Cultivars”
e0“Isoperoxidases were detected in resistant Rossol and susceptible Roma VF tomato roots uninfected and infected by Meloidogyne incognita”
e1“Nematode infestation markedly enhanced syringaldazine oxidase activity in cell walls of the resistant cultivar”
Claim · model-written summary
In the susceptible cultivar Roma VF, M. incognita infection increased cytoplasmic PPD-PC oxidase activity.
- Taxon
- TomatoSolanum lycopersicumt0
- Material
- Roma VFe0
- Organ / stage
- rootse0
- Treatment
- M. incognita infectione3
- Interactor
- M. incognitaMeloidogyne incognitae3pest
- Outcome
- cytoplasmic PPD-PC oxidase activitye3
- Direction
- increasee3
- Comparator
- uninfectede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Tomato Cultivars”
e0“Isoperoxidases were detected in resistant Rossol and susceptible Roma VF tomato roots uninfected and infected by Meloidogyne incognita”
e3“reacted to M. incognita infection with an increase in cytoplasmic PPD-PC oxidase activity”
Claim · model-written summary
In the susceptible cultivar, M. incognita infection did not change cell wall isoperoxidases.
- Taxon
- TomatoSolanum lycopersicumt0
- Material
- Roma VFe0
- Treatment
- M. incognita infectione3
- Interactor
- M. incognitaMeloidogyne incognitae3pest
- Outcome
- cell wall isoperoxidasese4
- Direction
- no changese4
- Comparator
- uninfectede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Tomato Cultivars”
e0“Isoperoxidases were detected in resistant Rossol and susceptible Roma VF tomato roots uninfected and infected by Meloidogyne incognita”
e3“reacted to M. incognita infection with an increase in cytoplasmic PPD-PC oxidase activity”
e4“no changes in cell wall isoperoxidases were observed”
Claim · model-written summary
In susceptible tomato plants, nematode inoculation inhibited IAA oxidase activity.
- Taxon
- TomatoSolanum lycopersicumt0
- Material
- susceptible plantse6
- Treatment
- nematode inoculatione6
- Outcome
- IAA oxidasee6
- Direction
- inhibitede6
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Tomato Cultivars”
e6“IAA oxidase was inhibited in susceptible plants after nematode inoculation, whereas in resistant plants this activity increased in the soluble fraction and decreased in the microsomal fraction”
Claim · model-written summary
In resistant tomato plants, nematode inoculation increased IAA oxidase activity in the soluble fraction.
- Taxon
- TomatoSolanum lycopersicumt0
- Material
- resistant plantse6
- Treatment
- nematode inoculatione6
- Outcome
- IAA oxidasee6
- Direction
- increasede6
- Qualifier
- soluble fractione6
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Tomato Cultivars”
e6“IAA oxidase was inhibited in susceptible plants after nematode inoculation, whereas in resistant plants this activity increased in the soluble fraction and decreased in the microsomal fraction”
Claim · model-written summary
In resistant tomato plants, nematode inoculation decreased IAA oxidase activity in the microsomal fraction.
- Taxon
- TomatoSolanum lycopersicumt0
- Material
- resistant plantse6
- Treatment
- nematode inoculatione6
- Outcome
- IAA oxidasee6
- Direction
- decreasede6
- Qualifier
- microsomal fractione6
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Tomato Cultivars”
e6“IAA oxidase was inhibited in susceptible plants after nematode inoculation, whereas in resistant plants this activity increased in the soluble fraction and decreased in the microsomal fraction”
Claim · model-written summary
The isoperoxidase involved is part of the final step of lignin deposition in tomato.
- Taxon
- TomatoSolanum lycopersicumt0
- Gene
- isoperoxidasee2
- Outcome
- lignin depositione2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Tomato Cultivars”
e2“This isoperoxidase is involved in the last step of lignin deposition in plants”
Claim · model-written summary
The cytoplasmic PPD-PC oxidase is presumed to be involved in ethylene production in infected susceptible tomato.
- Taxon
- TomatoSolanum lycopersicumt0
- Gene
- PPD-PC oxidasee3
- Outcome
- ethylene productione5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Tomato Cultivars”
e3“reacted to M. incognita infection with an increase in cytoplasmic PPD-PC oxidase activity”
e5“which presumedly is involved in ethylene production”
The same questions in other papers
infection · cytology · Solanum lycopersicum (tomato)Positive and negative results
1 paper in the same direction as this paper · 2 in the opposite direction
- positive
- positive
- negative
infection · Meloidogyne incognita · Solanum lycopersicum (tomato)Positive and negative results
8 papers in the same direction as this paper · 10 in the opposite direction
- negative
- negative
- no effect
15 papers more in this group
See all 19 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.