Edible coating of chitosan ionically combined with -carrageenan maintains the bract and postharvest attributes of dragon fruit (Hylocereus undatus)


Citation

Supapvanich S., . and Boonyaritthongchai P., . and Wongs Aree C., . and Nguyen T. H., . and Buanong M., . Edible coating of chitosan ionically combined with -carrageenan maintains the bract and postharvest attributes of dragon fruit (Hylocereus undatus). pp. 682-694. ISSN 22317546

Abstract

Dragon fruit (Hylocereus undatus) has medicinal properties due to its rich antioxidant profile. Dragon fruit also has an attractive appearance of red peel and green bracts. However shrivelling and weight loss bract yellowing and postharvest diseases are major challenges to the dragon fruit trade. The objective of the present work was therefore to formulate a coating composed of chitosan and -carrageenan for dragon fruits during storage at 10C. The composite coating based on 1 chitosan (w/v) and 0.2 (w/v) -carrageenan with 0.75 (w/v) glycerol as a plasticiser effectively reduced the physiological weight loss and maintained the freshness of the dragon fruits while increasing the phenolic content and maintaining the titratable acidity in the pulp. The composite coating delayed chlorophyll degradation by suppressing chlorophyllase and chlorophyll-degrading peroxidase thereby maintaining the chlorophyll content (45.46 mg/100 g dry weight) and freshness of the bracts. However the composite coating did not possess a strong effect on enhancing chitinase and -1-3 glucanase activities of dragon fruits during storage and controlling disease symptoms.


Download File

Full text available from:

Abstract

Dragon fruit (Hylocereus undatus) has medicinal properties due to its rich antioxidant profile. Dragon fruit also has an attractive appearance of red peel and green bracts. However shrivelling and weight loss bract yellowing and postharvest diseases are major challenges to the dragon fruit trade. The objective of the present work was therefore to formulate a coating composed of chitosan and -carrageenan for dragon fruits during storage at 10C. The composite coating based on 1 chitosan (w/v) and 0.2 (w/v) -carrageenan with 0.75 (w/v) glycerol as a plasticiser effectively reduced the physiological weight loss and maintained the freshness of the dragon fruits while increasing the phenolic content and maintaining the titratable acidity in the pulp. The composite coating delayed chlorophyll degradation by suppressing chlorophyllase and chlorophyll-degrading peroxidase thereby maintaining the chlorophyll content (45.46 mg/100 g dry weight) and freshness of the bracts. However the composite coating did not possess a strong effect on enhancing chitinase and -1-3 glucanase activities of dragon fruits during storage and controlling disease symptoms.

Additional Metadata

[error in script]
Item Type: Article
AGROVOC Term: Edible coatings
AGROVOC Term: Hylocereus undatus
AGROVOC Term: Medicinal properties
AGROVOC Term: Postharvest diseases
AGROVOC Term: Chitosan
AGROVOC Term: Carrageenans
AGROVOC Term: Experimental design
AGROVOC Term: analysis
AGROVOC Term: Weight losses
AGROVOC Term: Freshness of foods
Depositing User: Mr. AFANDI ABDUL MALEK
Last Modified: 24 Apr 2025 00:55
URI: http://webagris.upm.edu.my/id/eprint/9994

Actions (login required)

View Item View Item
Agris UPM is powered by EPrints 3 which is developed by the School of Electronics and Computer Science at the University of Southampton. More information and software credits.