Abstract
【Objective】 The effects of methyl jasmonate (MeJA) on cold resistance, reactive oxygen species (ROS) metabolism and Ca2+-ATPase activity of postharvest banana fruit were investigated in this paper. 【Method】 Banana peels were treated with 10 μmol·L -1 MeJA for 1 min and incubated at 20℃ for 1 day (sampled as Day 0) , and then incubated in vitro at 7℃ for 10 days. The chilling injury index, cell membrane permeability, contents of H2O2 and , changes in activities of CAT, APX, NADPH oxidase and Ca2+-ATPase were determined.【Result】 Compared with control peels, the chilling injury index of MeJA treated peels was less and the increase of cell membrane permeability was slower. Moreover, MeJA treatment induced the increase of H2O2 content and production and maintained their high levels in early 4 days. However, MeJA treatment reduced the activities of CAT and APX and maintained low activity in early 4 days. MeJA treatment was also found to induce the activities of NADPH oxidase and Ca2+-ATPase of banana peels.【Conclusion】The reactive oxygen species induced by MeJA might serve as signal moleculars and be involved in chilling injury and chilling resistance of banana peels, and they might also induce calcium signaling.
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Claims 8
Claim · model-written summary
Methyl jasmonate lowered chilling injury in banana peels relative to control peels.
Verbatim
e0“Compared with control peels, the chilling injury index of MeJA treated peels was less”
t0“banana fruit”
Claim · model-written summary
Methyl jasmonate slowed the increase in banana peel membrane permeability relative to controls.
Verbatim
e0“Compared with control peels, the chilling injury index of MeJA treated peels was less and the increase of cell membrane permeability was slower”
t0“banana fruit”
Claim · model-written summary
Methyl jasmonate increased H2O2 content in banana peels and maintained a high level during the first four days.
- Taxon
- banana fruitt0
- Treatment
- MeJA treatmente0
- Outcome
- H2O2 contente0
- Direction
- increasee0
- Qualifier
- early 4 dayse0
Not reportedComparator
Verbatim
e0“MeJA treatment induced the increase of H2O2 content and production and maintained their high levels in early 4 days”
t0“banana fruit”
Claim · model-written summary
Methyl jasmonate increased H2O2 production in banana peels and maintained a high level during the first four days.
- Taxon
- banana fruitt0
- Treatment
- MeJA treatmente0
- Outcome
- productione0
- Direction
- increasee0
- Qualifier
- early 4 dayse0
Not reportedComparator
Verbatim
e0“MeJA treatment induced the increase of H2O2 content and production and maintained their high levels in early 4 days”
t0“banana fruit”
Claim · model-written summary
Methyl jasmonate reduced CAT and APX activities in banana peels and kept them low for four days.
- Taxon
- banana fruitt0
- Treatment
- MeJA treatmente0
- Outcome
- activities of CAT and APXe0
- Direction
- reducede0
- Qualifier
- early 4 dayse0
Not reportedComparator
Verbatim
e0“MeJA treatment reduced the activities of CAT and APX and maintained low activity in early 4 days”
t0“banana fruit”
Claim · model-written summary
Methyl jasmonate induced NADPH oxidase and Ca2+-ATPase activities in banana peels.
- Taxon
- bananae0
- Treatment
- MeJA treatmente0
- Outcome
- activities of NADPH oxidase and Ca2+-ATPasee0
- Direction
- inducee0
Not reportedComparator
Verbatim
e0“MeJA treatment was also found to induce the activities of NADPH oxidase and Ca2+-ATPase of banana peels”
Claim · model-written summary
The authors suggest MeJA-induced reactive oxygen species act as signals in chilling injury and resistance in banana peels.
Verbatim
e0“The reactive oxygen species induced by MeJA might serve as signal moleculars and be involved in chilling injury and chilling resistance of banana peels”
Claim · model-written summary
The authors suggest MeJA-induced reactive oxygen species also induce calcium signaling in banana peels.
Verbatim
e0“The reactive oxygen species induced by MeJA might serve as signal moleculars and be involved in chilling injury and chilling resistance of banana peels, and they might also induce calcium signaling”
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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.