Abstract
Effect of heat treatment and pretreatment(prior to heat treatment) with dimethylthiourea(DMTU,a trap for H2O2) on cell membrane injury and metabolism of reactive oxygen species in cucumbers stored at 2 ℃was investigated.The content of malondialdehyde(MDA),the chilling injury index and electrolyte leakage in control cucumbers were increased during the cold storage;H2O2 content,the activities of superoxide dismutase(SOD) and catalase(CAT) exhibited an initial fast increase followed by a reduction;the activities of peroxidase(POD) and ascorbate peroxidase(APX) were decreased with storage time.Heat treatment alleviated the chilling injury development,enhanced the endogenous H2O2 content during early storage,postponed the increase of MDA content and increased the activities of CAT,APX and SOD in cucumbers stored at low temperature.However,heat treatment had no significant effect on POD activity,suggesting that the enzyme did not play a key role in chilling tolerance in relation to antioxidant activity.On the contrary,DMTU treatment counteracted heat treatment-induced tolerance in cucumbers,exhibiting higher chilling injury index and MDA content,and decreased activities of CAT and APX.It is suggested that H2O2 mediated chilling resistance induced by heat treatment in cucumbers.
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 11
Claim · model-written summary
Control cucumbers accumulated MDA and showed increasing chilling injury and electrolyte leakage during cold storage.
- Taxon
- cucumbers
Cucumis sativuse0 - Outcome
- malondialdehyde(MDA),the chilling injury index and electrolyte leakagee0
- Direction
- increasede0
- Setting
- cold storagee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The content of malondialdehyde(MDA),the chilling injury index and electrolyte leakage in control cucumbers were increased during the cold storage”
Claim · model-written summary
H2O2, SOD and CAT initially increased and then declined in cold stored cucumbers.
- Taxon
- CucumberCucumis sativust0
- Outcome
- H2O2 content,the activities of superoxide dismutase(SOD) and catalase(CAT)e0
- Direction
- initial fast increase followed by a reductione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“H2O2 content,the activities of superoxide dismutase(SOD) and catalase(CAT) exhibited an initial fast increase followed by a reduction”
t0“Cucumber”
Claim · model-written summary
POD and APX activity decreased over storage time.
- Taxon
- CucumberCucumis sativust0
- Outcome
- activities of peroxidase(POD) and ascorbate peroxidase(APX)e0
- Direction
- decreasede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the activities of peroxidase(POD) and ascorbate peroxidase(APX) were decreased with storage time”
t0“Cucumber”
Claim · model-written summary
Heat treatment alleviated cucumber chilling injury.
- Taxon
- CucumberCucumis sativust0
- Treatment
- Heat treatmente0
- Outcome
- chilling injury developmente0
- Direction
- alleviatede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Heat treatment alleviated the chilling injury development”
t0“Cucumber”
Claim · model-written summary
Heat treatment increased early endogenous H2O2.
- Taxon
- cucumbersCucumis sativuse1
- Treatment
- Heat treatmente1
- Outcome
- endogenous H2O2 contente0
- Direction
- enhancede0
- Qualifier
- during early storagee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“enhanced the endogenous H2O2 content during early storage”
e1“Heat treatment alleviated the chilling injury development,enhanced the endogenous H2O2 content during early storage,postponed the increase of MDA content and increased the activities of CAT,APX and SOD in cucumbers stored at low temperature.”
Claim · model-written summary
Heat treatment postponed MDA accumulation.
- Taxon
- cucumbersCucumis sativuse1
- Treatment
- Heat treatmente1
- Outcome
- MDA contente0
- Direction
- postponede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“postponed the increase of MDA content”
e1“Heat treatment alleviated the chilling injury development,enhanced the endogenous H2O2 content during early storage,postponed the increase of MDA content and increased the activities of CAT,APX and SOD in cucumbers stored at low temperature.”
Claim · model-written summary
Heat treatment increased CAT, APX and SOD activities.
- Taxon
- cucumbersCucumis sativuse0
- Treatment
- Heat treatmente1
- Outcome
- activities of CAT,APX and SODe0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“increased the activities of CAT,APX and SOD in cucumbers stored at low temperature”
e1“Heat treatment alleviated the chilling injury development,enhanced the endogenous H2O2 content during early storage,postponed the increase of MDA content and increased the activities of CAT,APX and SOD in cucumbers stored at low temperature.”
Claim · model-written summary
Heat treatment had no significant effect on POD activity.
- Taxon
- CucumberCucumis sativust0
- Treatment
- heat treatmente0
- Outcome
- POD activitye0
- Direction
- no significant effecte0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“heat treatment had no significant effect on POD activity”
t0“Cucumber”
Claim · model-written summary
DMTU counteracted heat-induced chilling tolerance, with higher injury index and MDA.
- Taxon
- cucumbersCucumis sativuse0
- Treatment
- DMTU treatmente0
- Outcome
- chilling injury index and MDA contente0
- Direction
- highere0
- Comparator
- heat treatmente0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“DMTU treatment counteracted heat treatment-induced tolerance in cucumbers,exhibiting higher chilling injury index and MDA content”
Claim · model-written summary
DMTU reduced CAT and APX activities.
- Taxon
- cucumbersCucumis sativuse0
- Treatment
- DMTU treatmente0
- Outcome
- activities of CAT and APXe0
- Direction
- decreasede0
- Comparator
- heat treatmente0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“DMTU treatment counteracted heat treatment-induced tolerance in cucumbers,exhibiting higher chilling injury index and MDA content,and decreased activities of CAT and APX”
Claim · model-written summary
The authors suggest H2O2 mediated heat-induced chilling resistance.
- Taxon
- cucumbersCucumis sativuse0
- Treatment
- heat treatmente0
- Compound
- H2O2e0
- Outcome
- chilling resistancee0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“H2O2 mediated chilling resistance induced by heat treatment in cucumbers”
The same questions in other papers
heat · physiology: antioxidant enzymes · Cucumis sativus (cucumber)Results differ
8 papers in the same direction as this paper · 3 in the opposite direction
- negative
- negative
- negative
8 papers more in this group
See all 12 papers →heat · physiology: oxidative · Cucumis sativus (cucumber)Positive and negative results
6 papers in the same direction as this paper · 7 in the opposite direction
- negative
- negative
- negative
10 papers more in this group
See all 14 papers →heat · crop injury · Cucumis sativus (cucumber)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.