Abstract
In order to reveal the mechanisms of methyl jasmonat(eMeJA)inhibiting postharvest decay in grape berries,‘Kyoho’grape berries were pretreated with 10 μmol · L-1 MeJA vapor for 6 h and then stored at 1 ℃ for 28 days. The fruit decay incidence,weight loss rate,levels of endogenous signaling molecules nitric oxide(NO)and hydrogen peroxide(H2O2),activities of phytoalexin synthesis related enzymes and individual phytoalexin compounds contents were determined at 7-day intervals during the storage. The results exhibited that the MeJA treatment could significantly inhibit the increase in decay incidence and weight loss rate,promote endogenous NO release and H2O2 content during the early stage of the storage,and simultaneously induce the increase in activities of phenylalanine-ammonia-lyase(PAL), cinnamate 4-hydroxylase(C4H),4-coumarate coenzyme A ligase(4-CL)and resveratrol synthase(RS)associated with phytoalexin synthesis and the contents of phytoalexins including resveratrol and viniferin in grape berries during the storage. Therefore,we speculate that MeJA might play an important role in signal transduction in grape cells,which regulated the downstream signaling molecules NO and H2O2 levels to enhance activities of enzymes related to phytoalexin synthesis,resulting in promoting phytoalexin accumulation and furthermore improving disease resistance in grape berries.
Abstract from the paper’s OpenAlex record, shown for indexing and research. Copyright remains with the authors or the publisher.
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 8
Claim · model-written summary
MeJA significantly inhibited increased grape decay incidence.
Not reportedComparator
Verbatim
t0“Grape Berries”
e0“MeJA treatment could significantly inhibit the increase in decay incidence and weight loss rate”
Claim · model-written summary
MeJA significantly inhibited increased grape weight loss.
Not reportedComparator
Verbatim
t0“Grape Berries”
e0“MeJA treatment could significantly inhibit the increase in decay incidence and weight loss rate”
Claim · model-written summary
MeJA promoted early storage release of endogenous nitric oxide.
- Taxon
- Grapet0
- Treatment
- MeJAe1
- Outcome
- endogenous NO releasee0
- Direction
- promotee0
- Qualifier
- early stage of the storagee0
Not reportedComparator
Verbatim
t0“Grape Berries”
e0“promote endogenous NO release and H2O2 content during the early stage of the storage”
e1“MeJA treatment could significantly inhibit the increase in decay incidence and weight loss rate”
Claim · model-written summary
MeJA promoted early storage hydrogen peroxide content.
- Taxon
- Grapet0
- Treatment
- MeJAe1
- Outcome
- H2O2 contente0
- Direction
- promotee0
- Qualifier
- early stage of the storagee0
Not reportedComparator
Verbatim
t0“Grape Berries”
e0“promote endogenous NO release and H2O2 content during the early stage of the storage”
e1“MeJA treatment could significantly inhibit the increase in decay incidence and weight loss rate”
Claim · model-written summary
MeJA increased activities of PAL, C4H and 4-CL during storage.
- Taxon
- Grapet0
- Outcome
- activities of phenylalanine-ammonia-lyase(PAL), cinnamate 4-hydroxylase(C4H),4-coumarate coenzyme A ligase(4-CL)e0
- Direction
- increasee0
Not reportedTreatmentComparator
Verbatim
t0“Grape Berries”
e0“induce the increase in activities of phenylalanine-ammonia-lyase(PAL), cinnamate 4-hydroxylase(C4H),4-coumarate coenzyme A ligase(4-CL)and resveratrol synthase(RS)associated with phytoalexin synthesis”
Claim · model-written summary
MeJA increased resveratrol synthase activity during storage.
- Taxon
- Grapet0
- Treatment
- MeJA treatmente1
- Gene
- resveratrol synthase(RS)e0
- Outcome
- resveratrol synthase(RS)e0
- Direction
- increasee0
Not reportedComparator
Verbatim
t0“Grape Berries”
e0“induce the increase in activities of phenylalanine-ammonia-lyase(PAL), cinnamate 4-hydroxylase(C4H),4-coumarate coenzyme A ligase(4-CL)and resveratrol synthase(RS)associated with phytoalexin synthesis”
e1“The results exhibited that the MeJA treatment”
Claim · model-written summary
MeJA increased resveratrol and viniferin contents during storage.
- Taxon
- Grapet0
- Treatment
- MeJA treatmente2
- Outcome
- contents of phytoalexins including resveratrol and viniferine0
- Direction
- increasee1
Not reportedComparator
Verbatim
t0“Grape Berries”
e0“the contents of phytoalexins including resveratrol and viniferin in grape berries during the storage”
e1“induce the increase”
e2“The results exhibited that the MeJA treatment”
Claim · model-written summary
The authors proposed that MeJA regulates NO and H2O2 signaling to increase phytoalexin synthesis enzymes, phytoalexin accumulation and disease resistance.
Verbatim
t0“Grape Berries”
e0“we speculate that MeJA might play an important role in signal transduction in grape cells,which regulated the downstream signaling molecules NO and H2O2 levels to enhance activities of enzymes related to phytoalexin synthesis,resulting in promoting phytoalexin accumulation and furthermore improving disease resistance in grape berries”
The same questions in other papers
(-)-methyl jasmonate · physiology: oxidative · VitisResults differ
3 papers in the same direction as this paper · 1 in the opposite direction
- no effect
- positive
- positive
1 paper more in this group
See all 5 papers →(-)-methyl jasmonate · molecular: metabolites · VitisPositive and negative results
14 papers in the same direction as this paper · 2 in the opposite direction
- no effect
- negative
- positive
13 papers more in this group
See all 17 papers →(-)-methyl jasmonate · quality: postharvest · VitisResults agree
1 paper in the same direction as this paper
- positive
(-)-methyl jasmonate · disease · VitisResults agree
2 papers in the same direction as this paper
- positive
- positive
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.