Abstract
• Chitosan-melatonin (CH-MT) edible coating preserved quality attributes of aril-sacs. • CH–MT coating inhibited the accumulation of off-flavour volatile compounds. • CH–MT coating reduced the loss of desirable flavour volatile compounds. • CH–MT coating upregulated phenolic metabolites with strong antioxidant properties. • CH–MT-coated aril-sacs exhibited significantly higher antioxidant activity. This study evaluated the mechanisms of chitosan-melatonin (CH-MT) edible coating in preserving the postharvest quality of minimally processed pomegranate aril-sacs. Mature pomegranate fruits were harvested, processed into aril-sacs, and treated with a composite coating comprising CH (0.5 %) and MT (0.8 mM), while distilled water served as the control treatment. The aril-sacs were stored at 5 °C and 85 % relative humidity for 21 days. CH-MT-coated aril-sacs showed higher antioxidant capacity, as shown by higher DPPH, ABTS + , and FRAP. This heightened antioxidant potential was associated with elevated activities of phenylalanine ammonia-lyase, peroxidase and catalase, and the suppression of polyphenol oxidase enzyme activity. The CH-MT edible coating also promoted the accumulation of key metabolites such as caffeic acid and quinic acid methyl ester with potent antioxidant properties while inhibiting specific volatile compounds linked to off-flavors. These findings demonstrate the efficacy and mechanisms of CH-MT composite coating in maintaining the quality of pomegranate aril-sacs, thus presenting a robust strategy for enhancing the postharvest storability of fresh-cut produce.
Abstract from the paper’s OpenAlex record; open copy licensed cc-by-nc-nd. 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 7
Claim · model-written summary
CH-MT-coated aril-sacs had higher antioxidant capacity than distilled-water controls
- Taxon
- pomegranate
Punica granatume1 - Treatment
- CH-MT-coatede2
- Outcome
- antioxidant capacitye2
- Direction
- highere2
- Qualifier
- stored at 5 °C and 85 % relative humidity for 21 dayse5
- Comparator
- distilled watere1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Mature pomegranate fruits were harvested, processed into aril-sacs, and treated with a composite coating comprising CH (0.5 %) and MT (0.8 mM), while distilled water served as the control treatment”
e2“CH-MT-coated aril-sacs showed higher antioxidant capacity, as shown by higher DPPH, ABTS + , and FRAP”
e5“The aril-sacs were stored at 5 °C and 85 % relative humidity for 21 days”
Claim · model-written summary
The composite coating elevated activities of phenylalanine ammonia-lyase, peroxidase and catalase
- Taxon
- pomegranatePunica granatume1
- Treatment
- composite coatinge1
- Outcome
- activities of phenylalanine ammonia-lyase, peroxidase and catalasee3
- Direction
- elevatede3
- Comparator
- distilled watere1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Mature pomegranate fruits were harvested, processed into aril-sacs, and treated with a composite coating comprising CH (0.5 %) and MT (0.8 mM), while distilled water served as the control treatment”
e3“This heightened antioxidant potential was associated with elevated activities of phenylalanine ammonia-lyase, peroxidase and catalase, and the suppression of polyphenol oxidase enzyme activity”
Claim · model-written summary
The composite coating suppressed polyphenol oxidase enzyme activity
- Taxon
- pomegranatePunica granatume1
- Treatment
- composite coatinge1
- Gene
- polyphenol oxidasee3
- Outcome
- polyphenol oxidase enzyme activitye3
- Direction
- suppressione3
- Comparator
- distilled watere1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Mature pomegranate fruits were harvested, processed into aril-sacs, and treated with a composite coating comprising CH (0.5 %) and MT (0.8 mM), while distilled water served as the control treatment”
e3“This heightened antioxidant potential was associated with elevated activities of phenylalanine ammonia-lyase, peroxidase and catalase, and the suppression of polyphenol oxidase enzyme activity”
Claim · model-written summary
The CH-MT coating promoted accumulation of caffeic acid and quinic acid methyl ester in aril-sacs
- Taxon
- pomegranatePunica granatume1
- Treatment
- CH-MT edible coatinge4
- Outcome
- accumulation of key metabolites such as caffeic acid and quinic acid methyl estere4
- Direction
- promotede4
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Mature pomegranate fruits were harvested, processed into aril-sacs, and treated with a composite coating comprising CH (0.5 %) and MT (0.8 mM), while distilled water served as the control treatment”
e4“The CH-MT edible coating also promoted the accumulation of key metabolites such as caffeic acid and quinic acid methyl ester with potent antioxidant properties while inhibiting specific volatile compounds linked to off-flavors”
Claim · model-written summary
The CH-MT coating inhibited accumulation of volatile compounds linked to off-flavours
- Taxon
- pomegranatePunica granatume1
- Treatment
- CH-MT edible coatinge4
- Outcome
- specific volatile compounds linked to off-flavorse4
- Direction
- inhibitinge4
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Mature pomegranate fruits were harvested, processed into aril-sacs, and treated with a composite coating comprising CH (0.5 %) and MT (0.8 mM), while distilled water served as the control treatment”
e4“The CH-MT edible coating also promoted the accumulation of key metabolites such as caffeic acid and quinic acid methyl ester with potent antioxidant properties while inhibiting specific volatile compounds linked to off-flavors”
Claim · model-written summary
The CH-MT coating reduced the loss of desirable flavour volatile compounds
- Taxon
- pomegranatePunica granatume1
- Treatment
- CH–MT coatinge2
- Outcome
- loss of desirable flavour volatile compoundse2
- Direction
- reducede2
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Mature pomegranate fruits were harvested, processed into aril-sacs, and treated with a composite coating comprising CH (0.5 %) and MT (0.8 mM), while distilled water served as the control treatment”
e2“CH–MT coating reduced the loss of desirable flavour volatile compounds”
Claim · model-written summary
The CH-MT coating upregulated phenolic metabolites with strong antioxidant properties
- Taxon
- pomegranatePunica granatume1
- Treatment
- CH–MT coatinge2
- Outcome
- phenolic metabolitese2
- Direction
- upregulatede2
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Mature pomegranate fruits were harvested, processed into aril-sacs, and treated with a composite coating comprising CH (0.5 %) and MT (0.8 mM), while distilled water served as the control treatment”
e2“CH–MT coating upregulated phenolic metabolites with strong antioxidant properties”
The same questions in other papers
storage · quality: phytochemicals · Punica granatum (pomegranate)Positive and negative results
14 papers in the same direction as this paper · 2 in the opposite direction
- positive
- positive
- no effect
13 papers more in this group
See all 17 papers →storage · physiology: antioxidant enzymes · Punica granatum (pomegranate)Results agree
1 paper in the same direction as this paper
- positive
storage · soil: biology · Punica granatum (pomegranate)Results agree
3 papers in the same direction as this paper
- positive
- positive
- positive
storage · molecular: metabolites · Punica granatum (pomegranate)Results agree
6 papers in the same direction as this paper
- positive
- positive
- positive
3 papers more in this group
See all 7 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.