Abstract
The activities of catalase, peroxidase, indoleacetic acid (IAA) oxidase and peroxide levels in cucumber plants during and after chilling were determined. During 96 hours at 5 C and 85% relative humidity, catalase activity declined, IAA oxidase activity increased, and peroxide concentrations increased. Peroxidase activity was not affected by chilling. When chilled plants were returned to 25 C to recover, enzyme activities and peroxide concentration were restored to their prechilling levels. The increase in peroxide and IAA oxidase activity may inactivate or destroy IAA and thus retard growth.
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Claims 7
Claim · model-written summary
Chilling reduced catalase activity in cucumber.
- Taxon
- Cucumber
Cucumis sativust0 - Treatment
- 96 hours at 5 C and 85% relative humiditye0
- Gene
- catalasee0
- Outcome
- catalase activitye0
- Direction
- declinede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“During 96 hours at 5 C and 85% relative humidity, catalase activity declined, IAA oxidase activity increased, and peroxide concentrations increased.”
t0“Cucumber Seedlings”
Claim · model-written summary
Chilling increased IAA oxidase activity.
- Taxon
- CucumberCucumis sativust0
- Treatment
- 96 hours at 5 C and 85% relative humiditye0
- Gene
- IAA oxidasee0
- Outcome
- IAA oxidase activitye0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“During 96 hours at 5 C and 85% relative humidity, catalase activity declined, IAA oxidase activity increased, and peroxide concentrations increased.”
t0“Cucumber Seedlings”
Claim · model-written summary
Chilling increased peroxide concentrations.
- Taxon
- CucumberCucumis sativust0
- Treatment
- 96 hours at 5 C and 85% relative humiditye0
- Outcome
- peroxide concentrationse0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“During 96 hours at 5 C and 85% relative humidity, catalase activity declined, IAA oxidase activity increased, and peroxide concentrations increased.”
t0“Cucumber Seedlings”
Claim · model-written summary
Chilling did not affect peroxidase activity.
- Taxon
- CucumberCucumis sativust0
- Treatment
- chillinge0
- Gene
- Peroxidasee0
- Outcome
- Peroxidase activitye0
- Direction
- not affectede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Peroxidase activity was not affected by chilling.”
t0“Cucumber Seedlings”
Claim · model-written summary
Upon return to 25 C, enzyme activities recovered to prechilling levels.
- Taxon
- CucumberCucumis sativust0
- Treatment
- returned to 25 Ce0
- Outcome
- enzyme activitiese0
- Direction
- restorede0
- Comparator
- prechilling levelse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“When chilled plants were returned to 25 C to recover, enzyme activities and peroxide concentration were restored to their prechilling levels.”
t0“Cucumber Seedlings”
Claim · model-written summary
Upon return to 25 C, peroxide concentration recovered to prechilling levels.
- Taxon
- CucumberCucumis sativust0
- Treatment
- returned to 25 Ce0
- Outcome
- peroxide concentratione0
- Direction
- restorede0
- Comparator
- prechilling levelse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“When chilled plants were returned to 25 C to recover, enzyme activities and peroxide concentration were restored to their prechilling levels.”
t0“Cucumber Seedlings”
Claim · model-written summary
Authors suggest peroxide and IAA oxidase increases may inactivate IAA and retard growth.
- Taxon
- CucumberCucumis sativust0
- Gene
- IAA oxidasee0
- Compound
- IAAe0
- Outcome
- retard growthe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The increase in peroxide and IAA oxidase activity may inactivate or destroy IAA and thus retard growth.”
t0“Cucumber Seedlings”
The same questions in other papers
cold · physiology: antioxidant enzymes · Cucumis sativus (cucumber)Results differ
5 papers in the same direction as this paper · 13 in the opposite direction
- negative
- positive
- positive
15 papers more in this group
See all 19 papers →humidity · physiology: enzyme activity · Cucumis sativus (cucumber)Positive and negative results
1 in the opposite direction
- positive
humidity · molecular: metabolites · Cucumis sativus (cucumber)Results agree
2 papers in the same direction as this paper
- negative
- no effect
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.