Abstract
SummaryThe effects of nitric oxide (NO) on lipid peroxidation and anti-oxidant activity in longan fruit were investigated during storage. Fruits were dipped for 5 min in a solution containing 1 mM sodium nitroprusside (SNP), an NO donor. They were then packed into polyethylene bags and stored for 6 d at 28°C. Changes in pericarp browning index, membrane permeability, malondialdehyde (MDA) content, the rate of superoxide production, the activities of lipoxygenase (LOX), superoxide dismutase (SOD), ascorbate peroxidase (APX) and catalase (CAT), α,αdiphenyl-βpicrylhydrazy (DPPH) radical scavenging activity, and reducing power were measured. Treatment with SNP inhibited pericarp browning and suppressed increases in membrane permeability and lipid peroxidation. These effects were associated with lower LOX activity, higher APX and CAT activities, better maintenance of DPPH radical scavenging activity and reducing power, and lower superoxide production rate. However, SOD activity was higher in control (non-SNP-treated) fruit than in SNP-treated fruit over the first 4 d of storage. Overall, these findings suggest that treatment with NO enhanced the anti-oxidant activity in pericarp tissue of longan fruit during storage, and contributed to reduced lipid peroxidation. Reduced lipid damage apparently maintained the compartmentation of enzymes and substrates and, thereby, lessened enzymatic browning.
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Claims 10
Claim · model-written summary
SNP inhibited longan pericarp browning.
- Taxon
- longan fruit
Dimocarpus longant0 - Treatment
- SNPe0
- Outcome
- pericarp browninge0
- Direction
- inhibitede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Treatment with SNP inhibited pericarp browning”
t0“longan fruit”
Claim · model-written summary
SNP suppressed increased membrane permeability and lipid peroxidation.
- Taxon
- longan fruitDimocarpus longant0
- Treatment
- SNPe0
- Outcome
- membrane permeability and lipid peroxidatione0
- Direction
- suppressed increasese0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Treatment with SNP inhibited pericarp browning and suppressed increases in membrane permeability and lipid peroxidation.”
t0“longan fruit”
Claim · model-written summary
SNP-treated fruit had lower LOX activity.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“These effects were associated with lower LOX activity”
t0“longan fruit”
t1“Treatment with SNP”
Claim · model-written summary
SNP-treated fruit had higher APX and CAT activities.
- Taxon
- longan fruitDimocarpus longant0
- Treatment
- SNPt1
- Outcome
- APX and CAT activitiese0
- Direction
- highere0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“higher APX and CAT activities”
t0“longan fruit”
t1“Treatment with SNP”
Claim · model-written summary
SNP-treated fruit better maintained DPPH radical scavenging and reducing power.
- Taxon
- longan fruitDimocarpus longant0
- Treatment
- SNPt1
- Outcome
- DPPH radical scavenging activity and reducing powere0
- Direction
- better maintenancee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“better maintenance of DPPH radical scavenging activity and reducing power”
t0“longan fruit”
t1“Treatment with SNP”
Claim · model-written summary
SNP-treated fruit had a lower superoxide production rate.
- Taxon
- longan fruitDimocarpus longant0
- Treatment
- SNPt1
- Outcome
- superoxide production ratee0
- Direction
- lowere0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“lower superoxide production rate”
t0“longan fruit”
t1“Treatment with SNP”
Claim · model-written summary
Control fruit had higher SOD activity than SNP-treated fruit during the first four days.
- Taxon
- longan fruitDimocarpus longant0
- Treatment
- SNP-treated fruite0
- Outcome
- SOD activitye0
- Direction
- highere0
- Qualifier
- over the first 4 d of storagee0
- Comparator
- control (non-SNP-treated) fruite0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“SOD activity was higher in control (non-SNP-treated) fruit than in SNP-treated fruit over the first 4 d of storage”
t0“longan fruit”
Claim · model-written summary
The authors infer that nitric oxide treatment enhanced pericarp antioxidant activity during storage.
- Taxon
- longan fruitDimocarpus longane0
- Organ / stage
- pericarp tissuee0
- Treatment
- NOe0
- Outcome
- anti-oxidant activitye0
- Direction
- enhancede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“treatment with NO enhanced the anti-oxidant activity in pericarp tissue of longan fruit during storage”
Claim · model-written summary
The authors infer that reduced lipid damage maintained enzyme and substrate compartmentation.
- Taxon
- longan fruitDimocarpus longant0
- Outcome
- compartmentation of enzymes and substratese0
- Qualifier
- Reduced lipid damagee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Reduced lipid damage apparently maintained the compartmentation of enzymes and substrates”
t0“longan fruit”
Claim · model-written summary
The authors infer that maintained compartmentation lessened enzymatic browning.
- Taxon
- longan fruitDimocarpus longant0
- Outcome
- enzymatic browninge0
- Direction
- lessenede0
- Qualifier
- compartmentation of enzymes and substratese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“maintained the compartmentation of enzymes and substrates and, thereby, lessened enzymatic browning”
t0“longan fruit”
The same questions in other papers
sodium nitroprusside · physiology: antioxidant enzymes · Dimocarpus longan (longan)Results differ
1 paper in the same direction as this paper · 1 in the opposite direction
- positive
- negative
sodium nitroprusside · physiology: oxidative · Dimocarpus longan (longan)Results agree
1 paper in the same direction as this paper
- positive
sodium nitroprusside · disease · Dimocarpus longan (longan)Results agree
1 paper in the same direction as this paper
- 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.