Abstract
Postharvest cherry tomatoes are prone to senescence, decay and nutrient loss during the storage period owing to microbial invasion and their own metabolism. In this work, postharvest cherry tomatoes were treated with a composite coating of 1% chitosan and 1% curdlan, and the characteristics of postharvest cherry tomatoes during storage were investigated. Compared to control samples, after 21 d of storage under ambient conditions, the cherry tomatoes treated with the chitosan and curdlan coatings showed less rottenness, less weight loss, a lower respiration rate, reduced ethylene production, lower malonaldehyde (MDA) content and reduced membrane permeability. After the samples were treated with the composite coating, the activities of free radical scavenging enzymes such as superoxide dismutase (SOD), catalase (CAT) and peroxidase (POD) were maintained at higher levels; the activities of related disease-resistant enzymes such as chitinase (CHI) and glucanase (GLU) were also maintained at higher levels. The soluble solids, titratable acidity, firmness, vitamin C content, lycopene content and antioxidant activities of postharvest cherry tomatoes treated with the composite coating exhibited higher levels as well. The composite coating of chitosan and curdlan might be a potentially promising method for preserving postharvest cherry tomatoes and other fruits.
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Claims 9
Claim · model-written summary
Coated cherry tomatoes had less rottenness than controls after 21 days under ambient storage.
- Taxon
- cherry tomatoes
Solanum lycopersicum var. cerasiformee0 - Treatment
- chitosan and curdlan coatingse0
- Outcome
- rottennesse0
- Direction
- lesse0
- Qualifier
- after 21 d of storagee0
- Comparator
- control samplese0
- Setting
- ambient conditionse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Compared to control samples, after 21 d of storage under ambient conditions, the cherry tomatoes treated with the chitosan and curdlan coatings showed less rottenness”
Claim · model-written summary
Coated cherry tomatoes had less weight loss than controls after 21 days.
- Taxon
- cherry tomatoesSolanum lycopersicum var. cerasiformee0
- Treatment
- chitosan and curdlan coatingse0
- Outcome
- weight losse0
- Direction
- lesse0
- Comparator
- control samplese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Compared to control samples, after 21 d of storage under ambient conditions, the cherry tomatoes treated with the chitosan and curdlan coatings showed less rottenness, less weight loss”
Claim · model-written summary
Coated cherry tomatoes had lower respiration rate and ethylene production than controls.
- Taxon
- cherry tomatoesSolanum lycopersicum var. cerasiformee0
- Treatment
- chitosan and curdlan coatingse0
- Outcome
- respiration rate, reduced ethylene productione0
- Direction
- lowere0
- Comparator
- control samplese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Compared to control samples, after 21 d of storage under ambient conditions, the cherry tomatoes treated with the chitosan and curdlan coatings showed less rottenness, less weight loss, a lower respiration rate, reduced ethylene production”
Claim · model-written summary
Coated cherry tomatoes had lower malonaldehyde content and membrane permeability than controls.
- Taxon
- cherry tomatoesSolanum lycopersicum var. cerasiformee0
- Treatment
- chitosan and curdlan coatingse0
- Outcome
- malonaldehyde (MDA) content and reduced membrane permeabilitye0
- Direction
- lowere0
- Comparator
- control samplese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Compared to control samples, after 21 d of storage under ambient conditions, the cherry tomatoes treated with the chitosan and curdlan coatings showed less rottenness, less weight loss, a lower respiration rate, reduced ethylene production, lower malonaldehyde (MDA) content and reduced membrane permeability”
Claim · model-written summary
Coating maintained higher SOD, CAT and POD activities in cherry tomatoes.
- Treatment
- composite coatinge0
- Gene
- superoxide dismutase (SOD), catalase (CAT) and peroxidase (POD)e0
- Outcome
- activities of free radical scavenging enzymese0
- Direction
- highere0
Not reportedTaxonComparator
Verbatim
e0“After the samples were treated with the composite coating, the activities of free radical scavenging enzymes such as superoxide dismutase (SOD), catalase (CAT) and peroxidase (POD) were maintained at higher levels”
Claim · model-written summary
Coating maintained higher chitinase and glucanase activities in cherry tomatoes.
- Gene
- chitinase (CHI) and glucanase (GLU)e0
- Outcome
- activities of related disease-resistant enzymese0
- Direction
- highere0
Not reportedTaxonTreatmentComparator
Verbatim
e0“the activities of related disease-resistant enzymes such as chitinase (CHI) and glucanase (GLU) were also maintained at higher levels”
Claim · model-written summary
Coated cherry tomatoes retained higher soluble solids, titratable acidity and firmness.
- Taxon
- cherry tomatoesSolanum lycopersicum var. cerasiformee0
- Treatment
- composite coatinge0
- Outcome
- soluble solids, titratable acidity, firmnesse0
- Direction
- highere0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The soluble solids, titratable acidity, firmness, vitamin C content, lycopene content and antioxidant activities of postharvest cherry tomatoes treated with the composite coating exhibited higher levels as well”
Claim · model-written summary
Coated cherry tomatoes retained higher vitamin C and lycopene contents and antioxidant activity.
- Taxon
- cherry tomatoesSolanum lycopersicum var. cerasiformee0
- Treatment
- composite coatinge0
- Outcome
- vitamin C content, lycopene content and antioxidant activitiese0
- Direction
- highere0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The soluble solids, titratable acidity, firmness, vitamin C content, lycopene content and antioxidant activities of postharvest cherry tomatoes treated with the composite coating exhibited higher levels as well”
Claim · model-written summary
The authors consider chitosan-curdlan coating promising for preserving postharvest cherry tomatoes and other fruits.
- Taxon
- cherry tomatoesSolanum lycopersicum var. cerasiformee0
- Outcome
- method for preserving postharvest cherry tomatoes and other fruitse0
- Qualifier
- might be a potentially promisinge0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The composite coating of chitosan and curdlan might be a potentially promising method for preserving postharvest cherry tomatoes and other fruits”
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