Abstract
Cucumber is a chilling-sensitive vegetable, which is susceptible to chilling injury during storage and shipment at temperatures below 7–10 °C. MeJA and NO have been shown to be able to induce chilling tolerance, but how they are related and how H2O2 is involved in the chilling responses they trigger remains unclear. Here postharvest application of 10 μM MeJA and 1 mM SNP, a NO donor, significantly reduced chilling injury of cucumbers stored at 5 °C. MeJA and SNP reduced H2O2 in cucumber during storage, suggesting that H2O2 may not function as a second messenger in chilling responses activated by MeJA or NO, and that, both MeJA and NO alleviated CI by inhibiting H2O2 generation. This is confirmed by the evidence that diphenylene iodonium further strengthened the chilling tolerance induced by MeJA or SNP. The lower H2O2 induced by MeJA and NO was coincident with enhanced catalase activity and gene expression, suggesting that CAT played an important role in control of H2O2 accumulation. Two more independent experiments showed that, L-NAME and cPTIO, inhibitors of endogenous NO accumulation, significantly compromised MeJA-induced chilling tolerance, but IBU and SHAM, inhibitors of endogenous jasmonic acids biosynthesis, did not affect the chilling tolerance activated by SNP, suggesting MeJA may function upstream of and depend on NO in the signaling pathway that activates chilling tolerance in cucumber.
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Claims 11
Claim · model-written summary
Postharvest application of 10 μM MeJA significantly reduced chilling injury of cucumbers stored at 5 °C.
- Taxon
- Cucumber
Cucumis sativuse0 - Treatment
- postharvest application of 10 μM MeJAe1
- Outcome
- chilling injurye1
- Direction
- significantly reducede1
- Qualifier
- cucumbers stored at 5 °Ce1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Cucumber is a chilling-sensitive vegetable”
e1“postharvest application of 10 μM MeJA and 1 mM SNP, a NO donor, significantly reduced chilling injury of cucumbers stored at 5 °C”
Claim · model-written summary
Postharvest application of 1 mM SNP, a NO donor, significantly reduced chilling injury of cucumbers stored at 5 °C.
- Taxon
- CucumberCucumis sativuse0
- Treatment
- 1 mM SNP, a NO donore1
- Outcome
- chilling injurye1
- Direction
- significantly reducede1
- Qualifier
- cucumbers stored at 5 °Ce1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Cucumber is a chilling-sensitive vegetable”
e1“postharvest application of 10 μM MeJA and 1 mM SNP, a NO donor, significantly reduced chilling injury of cucumbers stored at 5 °C”
Claim · model-written summary
MeJA reduced H2O2 in cucumber during storage.
- Taxon
- CucumberCucumis sativuse0
- Treatment
- MeJAe2
- Outcome
- H2O2e2
- Direction
- reducede2
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Cucumber is a chilling-sensitive vegetable”
e2“MeJA and SNP reduced H2O2 in cucumber during storage”
Claim · model-written summary
SNP reduced H2O2 in cucumber during storage.
- Taxon
- CucumberCucumis sativuse0
- Treatment
- SNPe2
- Outcome
- H2O2e2
- Direction
- reducede2
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Cucumber is a chilling-sensitive vegetable”
e2“MeJA and SNP reduced H2O2 in cucumber during storage”
Claim · model-written summary
Lower H2O2 under MeJA and NO coincided with enhanced catalase activity and gene expression.
- Taxon
- CucumberCucumis sativuse0
- Treatment
- MeJA and NOe7
- Outcome
- catalase activity and gene expressione7
- Direction
- enhancede7
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Cucumber is a chilling-sensitive vegetable”
e7“The lower H2O2 induced by MeJA and NO was coincident with enhanced catalase activity and gene expression”
Claim · model-written summary
CAT plays an important role in controlling H2O2 accumulation in cucumber.
- Taxon
- CucumberCucumis sativuse0
- Gene
- CATe4
- Outcome
- control of H2O2 accumulatione4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Cucumber is a chilling-sensitive vegetable”
e4“suggesting that CAT played an important role in control of H2O2 accumulation”
Claim · model-written summary
Diphenylene iodonium further strengthened the chilling tolerance induced by MeJA or SNP.
- Taxon
- CucumberCucumis sativuse0
- Treatment
- diphenylene iodoniume4
- Outcome
- chilling tolerancee4
- Direction
- further strengthenede4
- Comparator
- MeJA or SNPe4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Cucumber is a chilling-sensitive vegetable”
e4“diphenylene iodonium further strengthened the chilling tolerance induced by MeJA or SNP”
Claim · model-written summary
L-NAME and cPTIO significantly compromised MeJA-induced chilling tolerance.
- Taxon
- CucumberCucumis sativuse0
- Treatment
- L-NAME and cPTIOe5
- Outcome
- MeJA-induced chilling tolerancee5
- Direction
- significantly compromisede5
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Cucumber is a chilling-sensitive vegetable”
e5“L-NAME and cPTIO, inhibitors of endogenous NO accumulation, significantly compromised MeJA-induced chilling tolerance”
Claim · model-written summary
IBU and SHAM did not affect the chilling tolerance activated by SNP.
- Taxon
- CucumberCucumis sativuse0
- Treatment
- IBU and SHAMe6
- Outcome
- chilling tolerance activated by SNPe6
- Direction
- did not affecte6
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Cucumber is a chilling-sensitive vegetable”
e6“IBU and SHAM, inhibitors of endogenous jasmonic acids biosynthesis, did not affect the chilling tolerance activated by SNP, suggesting MeJA may function upstream of and depend on NO in the signaling pathway that activates chilling tolerance in cucumber”
Claim · model-written summary
MeJA may act upstream of NO in the signalling pathway that activates chilling tolerance in cucumber.
- Taxon
- CucumberCucumis sativuse0
- Treatment
- MeJAe6
- Compound
- NOe6
- Outcome
- chilling tolerancee6
- Qualifier
- may function upstream of and depend on NOe6
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Cucumber is a chilling-sensitive vegetable”
e6“IBU and SHAM, inhibitors of endogenous jasmonic acids biosynthesis, did not affect the chilling tolerance activated by SNP, suggesting MeJA may function upstream of and depend on NO in the signaling pathway that activates chilling tolerance in cucumber”
Claim · model-written summary
MeJA and NO alleviated chilling injury by inhibiting H2O2 generation.
- Taxon
- CucumberCucumis sativuse0
- Treatment
- MeJA and NOe3
- Compound
- H2O2e3
- Outcome
- alleviated CIe3
- Qualifier
- by inhibiting H2O2 generatione3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Cucumber is a chilling-sensitive vegetable”
e3“both MeJA and NO alleviated CI by inhibiting H2O2 generation”
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