Abstract
Activities of enzymes involved in the detoxification of reactive oxygen species (catalase, glutathione reductase, peroxidase and superoxide dismutase (SOD)) were examined in the leaves of Phaseolus vulgaris L. var. Top Crop treated with plant hormones and infected with a non-lesion-forming isolate of white clover mosaic potexvirus (WClMV). The activities of catalase, glutathione reductase and SOD rapidly declined after infection while peroxidase activity was enhanced. These changes occurred before the rapid increase (5 days) in WClMV replication. A mild chlorosis appeared 7-10 days after inoculation but necrosis was never observed on inoculated leaves. Plants treated with dihydrozeatin, salicylic acid and jasmonic acid prior to WClMV inoculation showed elevated catalase, glutathione reductase, and peroxidase activity, while SOD activities remained the same as in water-treated controls. These treatments all inhibited virus replication with enzyme activities remaining near control levels. We propose that a decline in free radical scavenging capacity may be required before a rapid increase in virus replication can take place. Treatments increasing the ability of the plant to scavenge reactive oxygen species may hinder virus replication. A possible role for reactive oxygen species as a requirement for virus replication is discussed.
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Claims 7
Claim · model-written summary
Catalase, glutathione reductase and SOD activities rapidly declined after WClMV infection.
- Taxon
- Phaseolus vulgaris
Phaseolus vulgarise0 - Organ / stage
- leavese0
- Treatment
- infected with a non-lesion-forming isolate of white clover mosaic potexviruse0
- Interactor
- white clover mosaic potexviruse0pathogen
- Outcome
- activities of catalase, glutathione reductase and SODe1
- Direction
- declinede1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“were examined in the leaves of Phaseolus vulgaris L. var. Top Crop treated with plant hormones and infected with a non-lesion-forming isolate of white clover mosaic potexvirus (WClMV)”
e1“The activities of catalase, glutathione reductase and SOD rapidly declined after infection”
Claim · model-written summary
Peroxidase activity was enhanced after WClMV infection.
- Taxon
- Phaseolus vulgarisPhaseolus vulgarise0
- Treatment
- infected with a non-lesion-forming isolate of white clover mosaic potexviruse0
- Interactor
- white clover mosaic potexviruse0pathogen
- Outcome
- peroxidase activitye2
- Direction
- enhancede2
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“were examined in the leaves of Phaseolus vulgaris L. var. Top Crop treated with plant hormones and infected with a non-lesion-forming isolate of white clover mosaic potexvirus (WClMV)”
e2“while peroxidase activity was enhanced”
Claim · model-written summary
The rapid increase in WClMV replication occurred about 5 days after infection, after the enzyme changes.
- Taxon
- Phaseolus vulgarisPhaseolus vulgarise0
- Interactor
- WClMVWhite clover mosaic viruse3pathogen
- Outcome
- WClMV replicatione3
- Direction
- rapid increasee3
- Value
- 5 dayse3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“were examined in the leaves of Phaseolus vulgaris L. var. Top Crop treated with plant hormones and infected with a non-lesion-forming isolate of white clover mosaic potexvirus (WClMV)”
e3“before the rapid increase (5 days) in WClMV replication”
Claim · model-written summary
Dihydrozeatin, salicylic acid and jasmonic acid treatment elevated catalase, glutathione reductase and peroxidase activity before WClMV inoculation.
- Taxon
- Phaseolus vulgarisPhaseolus vulgarise0
- Treatment
- dihydrozeatin, salicylic acid and jasmonic acide4
- Interactor
- WClMVWhite clover mosaic viruse4pathogen
- Outcome
- catalase, glutathione reductase, and peroxidase activitye4
- Direction
- elevatede4
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“were examined in the leaves of Phaseolus vulgaris L. var. Top Crop treated with plant hormones and infected with a non-lesion-forming isolate of white clover mosaic potexvirus (WClMV)”
e4“Plants treated with dihydrozeatin, salicylic acid and jasmonic acid prior to WClMV inoculation showed elevated catalase, glutathione reductase, and peroxidase activity”
Claim · model-written summary
SOD activity remained the same in hormone-treated plants as in water-treated controls.
- Taxon
- Phaseolus vulgarisPhaseolus vulgarise0
- Treatment
- dihydrozeatin, salicylic acid and jasmonic acide4
- Interactor
- WClMVWhite clover mosaic viruse4pathogen
- Outcome
- SOD activitiese5
- Direction
- remained the samee5
- Comparator
- water-treated controlse5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“were examined in the leaves of Phaseolus vulgaris L. var. Top Crop treated with plant hormones and infected with a non-lesion-forming isolate of white clover mosaic potexvirus (WClMV)”
e4“Plants treated with dihydrozeatin, salicylic acid and jasmonic acid prior to WClMV inoculation showed elevated catalase, glutathione reductase, and peroxidase activity”
e5“SOD activities remained the same as in water-treated controls”
Claim · model-written summary
Dihydrozeatin, salicylic acid and jasmonic acid treatments inhibited virus replication.
- Taxon
- Phaseolus vulgarisPhaseolus vulgarise0
- Treatment
- dihydrozeatin, salicylic acid and jasmonic acide4
- Interactor
- viruse7pathogen
- Outcome
- virus replicatione7
- Direction
- inhibitede7
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“were examined in the leaves of Phaseolus vulgaris L. var. Top Crop treated with plant hormones and infected with a non-lesion-forming isolate of white clover mosaic potexvirus (WClMV)”
e4“Plants treated with dihydrozeatin, salicylic acid and jasmonic acid prior to WClMV inoculation showed elevated catalase, glutathione reductase, and peroxidase activity”
e7“These treatments all inhibited virus replication with enzyme activities remaining near control levels”
Claim · model-written summary
A decline in free radical scavenging capacity may be required before a rapid increase in virus replication.
- Taxon
- Phaseolus vulgarisPhaseolus vulgarise0
- Outcome
- rapid increase in virus replicatione1
- Qualifier
- decline in free radical scavenging capacitye1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“were examined in the leaves of Phaseolus vulgaris L. var. Top Crop treated with plant hormones and infected with a non-lesion-forming isolate of white clover mosaic potexvirus (WClMV)”
e1“We propose that a decline in free radical scavenging capacity may be required before a rapid increase in virus replication can take place”
The same questions in other papers
jasmonic acid · disease · Phaseolus vulgaris (common bean)Results agree
1 paper in the same direction as this paper
- positive
salicylic acid · disease · Phaseolus vulgaris (common bean)Results agree
7 papers in the same direction as this paper
- positive
- positive
- positive
4 papers more in this group
See all 8 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.