Abstract
Elicitor preparations containing the avr5 gene products from races 4 and 2.3 of Cladosporium fulvum, and tomato (Lycopersicon esculentum L.) cells containing the resistance gene Cf5 were used to investigate the involvement of redox processes in the production of active oxygen species associated with the plant response to the fungal elicitors. Here we demonstrate that certain race-specific elicitors of C. fulvum induced an increase in ferricyanide reduction in enriched plasma membrane fractions of tomato cells. The addition of elicitors to plasma membranes also induced increases in NADH oxidase and NADH-dependent cytochrome c reductase activities, whereas ascorbate peroxidase activity was decreased. These results suggest that changes in the host plasma membrane redox processes, transferring electrons from reducing agents to oxygen, could be involved in the increased production of active oxygen species by the race-specific elicitors. Our results also show that the dephosphorylation of enzymes involved in redox reactions is responsible for the race-specific induced redox activity. The effects of guanidine nucleotide analogs and mastoparan on the activation of plasma membrane redox reactions support the role of GTP-binding proteins in the transduction of signals leading to the activation of the defense response mechanisms of tomato against fungal pathogens.
Abstract from the paper’s OpenAlex record, shown for indexing and research. Copyright remains with the authors or the publisher. Read at the source ↗
The text the model read, with the source record’s inline markup (italics, sub- and superscripts) rendered and its character entities decoded; quote offsets refer to the raw text.
Claims 7
Claim · model-written summary
Race-specific fungal elicitors increased ferricyanide reduction in tomato plasma membranes.
- Taxon
- tomato
Solanum lycopersicume0 - Treatment
- certain race-specific elicitors of C. fulvume0
- Interactor
- C. fulvum
Fulvia fulvae0pathogen - Outcome
- ferricyanide reductione0
- Direction
- increasee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“certain race-specific elicitors of C. fulvum induced an increase in ferricyanide reduction in enriched plasma membrane fractions of tomato cells”
Claim · model-written summary
Elicitors increased NADH oxidase activity in tomato plasma membranes.
- Taxon
- tomatoSolanum lycopersicume0
- Treatment
- elicitorse1
- Outcome
- NADH oxidasee1
- Direction
- increasese1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“tomato (Lycopersicon esculentum L.) cells”
e1“The addition of elicitors to plasma membranes also induced increases in NADH oxidase and NADH-dependent cytochrome c reductase activities”
Claim · model-written summary
Elicitors increased NADH-dependent cytochrome c reductase activity in tomato plasma membranes.
- Taxon
- tomatoSolanum lycopersicume0
- Treatment
- elicitorse1
- Outcome
- NADH-dependent cytochrome c reductase activitiese1
- Direction
- increasese1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“tomato (Lycopersicon esculentum L.) cells”
e1“The addition of elicitors to plasma membranes also induced increases in NADH oxidase and NADH-dependent cytochrome c reductase activities”
Claim · model-written summary
Elicitors decreased ascorbate peroxidase activity in tomato plasma membranes.
- Taxon
- tomatoSolanum lycopersicume0
- Treatment
- elicitorse2
- Outcome
- ascorbate peroxidase activitye1
- Direction
- decreasede1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“tomato (Lycopersicon esculentum L.) cells”
e1“ascorbate peroxidase activity was decreased”
e2“The addition of elicitors to plasma membranes also induced increases in NADH oxidase and NADH-dependent cytochrome c reductase activities”
Claim · model-written summary
Changes in host plasma membrane redox processes may contribute to elicitor-induced active oxygen species production.
- Taxon
- tomatoSolanum lycopersicume0
- Outcome
- increased production of active oxygen speciese1
- Qualifier
- changes in the host plasma membrane redox processese1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“tomato (Lycopersicon esculentum L.) cells”
e1“changes in the host plasma membrane redox processes, transferring electrons from reducing agents to oxygen, could be involved in the increased production of active oxygen species by the race-specific elicitors”
Claim · model-written summary
Dephosphorylation of redox enzymes was responsible for race-specific induced redox activity.
- Taxon
- tomatoSolanum lycopersicume0
- Outcome
- race-specific induced redox activitye1
- Qualifier
- dephosphorylation of enzymes involved in redox reactionse1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“tomato (Lycopersicon esculentum L.) cells”
e1“the dephosphorylation of enzymes involved in redox reactions is responsible for the race-specific induced redox activity”
Claim · model-written summary
Effects of guanidine nucleotide analogs and mastoparan supported a GTP-binding protein role in tomato defense signaling.
- Taxon
- tomatoSolanum lycopersicume0
- Treatment
- guanidine nucleotide analogs and mastoparane0
- Gene
- GTP-binding proteinse0
- Outcome
- activation of the defense response mechanismse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The effects of guanidine nucleotide analogs and mastoparan on the activation of plasma membrane redox reactions support the role of GTP-binding proteins in the transduction of signals leading to the activation of the defense response mechanisms of tomato against fungal pathogens”
The same questions in other papers
resistance inducer · physiology: enzyme activity · Solanum lycopersicum (tomato)Positive and negative results
1 paper in the same direction as this paper · 2 in the opposite direction
- negative
- negative
- positive
resistance inducer · molecular: metabolites · Solanum lycopersicum (tomato)Results agree
5 papers in the same direction as this paper
- positive
- positive
- positive
2 papers more in this group
See all 6 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.