Effects of Pullulan-Based Coatings Incorporating ɛ-Polylysine and Glutathione on the Preservation of Cowpeas (Vigna unguiculata L.) Postharvest

Pullulan has a fine-coating-forming ability, ɛ-polylysine has an antibacterial activity, and glutathione has both a potent antioxidant activity and polyphenol-oxidase-inhibiting ability. This study explored the effects of pullulan-based coatings incorporating ɛ-polylysine and glutathione (1% pullula...

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Bibliographic Details
Published in:Coatings (Basel) 2023-01, Vol.13 (1), p.125
Main Authors: Hu, Aoxue, Mao, Yingming
Format: Article
Language:English
Subjects:
Antioxidants
Coatings
Cowpeas
Glutathione
Moisture content
Pullulan
Respiration
Respiratory rate
Statistical analysis
Vegetables
Weight loss
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Summary:Pullulan has a fine-coating-forming ability, ɛ-polylysine has an antibacterial activity, and glutathione has both a potent antioxidant activity and polyphenol-oxidase-inhibiting ability. This study explored the effects of pullulan-based coatings incorporating ɛ-polylysine and glutathione (1% pullulan + 0.2% ɛ-polylysine + 0.3% glutathione) on the preservation of cowpeas (Vigna unguiculata L.) during refrigerated storage. Pullulan-based coatings incorporating ɛ-polylysine and glutathione decreased the weight loss, decay and rust spot indices, respiratory rate and malondialdehyde by 49.01%, 60.38%, 91.09%, 69.09% and 49.23%, respectively, and increased soluble solid content by 34.21% compared with the control group after 15 days of refrigerated storage (p < 0.05). Results show that pullulan-based coatings incorporating ɛ-polylysine and glutathione treatment may be practical materials for the preservation of cowpeas during refrigerated storage.
ISSN:2079-6412
2079-6412
DOI:10.3390/coatings13010125