Abstract
We have investigated the arginine decarboxylase (ADC, EC 4.1.1.19) and ornithine decarboxylase (ODC, EC 4.1.1.17) activities and the levels of conjugated polyamines to explain the decrease of free putrescine level caused by citrus exocortis viroid (CEVd) and ethephon treatment in tomato (Lycopersicon esculentum Mill. cv Rutgers) plants (J.M. Belles, J. Carbonell, V. Conejero [1991] Plant Physiol 96: 1053-1059). This decrease correlates with a decrease in ODC activity in CEVd-infected or ethephon-treated plants; ADC activity was not altered. CEVd infection had no effect on polyamine conjugates, and ethephon produced a decrease in putrescine conjugates. Interference with ethylene action by silver ions prevented the decrease in ODC activity and in free and conjugated putrescine. It is suggested that changes in putrescine level after CEVd infection and ethephon treatment are regulated via ODC activity and that conjugation is not involved.
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Claims 7
Claim · model-written summary
The decrease in putrescine correlates with a decrease in ODC activity in CEVd-infected or ethephon-treated tomato.
- Taxon
- Lycopersicon esculentum
Solanum lycopersicume0 - Material
- cv Rutgerse0
- Treatment
- CEVd-infected or ethephon-treatede1
- Interactor
- CEVde1pathogen
- Outcome
- ODC activitye1
- Direction
- decreasee1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“in tomato (Lycopersicon esculentum Mill. cv Rutgers) plants”
e1“This decrease correlates with a decrease in ODC activity in CEVd-infected or ethephon-treated plants; ADC activity was not altered.”
Claim · model-written summary
ADC activity was not altered in tomato plants infected with CEVd or treated with ethephon.
- Taxon
- Lycopersicon esculentumSolanum lycopersicume0
- Material
- cv Rutgerse0
- Outcome
- ADC activitye1
- Qualifier
- not alterede1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“in tomato (Lycopersicon esculentum Mill. cv Rutgers) plants”
e1“This decrease correlates with a decrease in ODC activity in CEVd-infected or ethephon-treated plants; ADC activity was not altered.”
Claim · model-written summary
CEVd infection had no effect on polyamine conjugates in tomato.
- Taxon
- Lycopersicon esculentumSolanum lycopersicume0
- Treatment
- CEVd infectione2
- Interactor
- CEVde2pathogen
- Outcome
- polyamine conjugatese2
- Direction
- no effecte2
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“in tomato (Lycopersicon esculentum Mill. cv Rutgers) plants”
e2“CEVd infection had no effect on polyamine conjugates, and ethephon produced a decrease in putrescine conjugates.”
Claim · model-written summary
Ethephon produced a decrease in putrescine conjugates in tomato.
- Taxon
- Lycopersicon esculentumSolanum lycopersicume0
- Treatment
- ethephone2
- Outcome
- putrescine conjugatese2
- Direction
- decreasee2
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“in tomato (Lycopersicon esculentum Mill. cv Rutgers) plants”
e2“CEVd infection had no effect on polyamine conjugates, and ethephon produced a decrease in putrescine conjugates.”
Claim · model-written summary
Interference with ethylene action by silver ions prevented the decrease in ODC activity.
- Taxon
- Lycopersicon esculentumSolanum lycopersicume0
- Treatment
- Interference with ethylene action by silver ionse3
- Outcome
- decrease in ODC activitye3
- Direction
- preventede3
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“in tomato (Lycopersicon esculentum Mill. cv Rutgers) plants”
e3“Interference with ethylene action by silver ions prevented the decrease in ODC activity and in free and conjugated putrescine.”
Claim · model-written summary
Interference with ethylene action by silver ions prevented the decrease in free and conjugated putrescine.
- Taxon
- Lycopersicon esculentumSolanum lycopersicume0
- Treatment
- Interference with ethylene action by silver ionse3
- Outcome
- free and conjugated putrescinee3
- Direction
- preventede3
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“in tomato (Lycopersicon esculentum Mill. cv Rutgers) plants”
e3“Interference with ethylene action by silver ions prevented the decrease in ODC activity and in free and conjugated putrescine.”
Claim · model-written summary
Changes in putrescine level after CEVd infection and ethephon treatment are regulated via ODC activity.
- Taxon
- Lycopersicon esculentumSolanum lycopersicume0
- Outcome
- changes in putrescine levele4
- Qualifier
- regulated via ODC activitye4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“in tomato (Lycopersicon esculentum Mill. cv Rutgers) plants”
e4“It is suggested that changes in putrescine level after CEVd infection and ethephon treatment are regulated via ODC activity and that conjugation is not involved.”
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
- no effect
- positive
- positive
29 papers more in this group
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.