Journal
FOOD AND BIOPROCESS TECHNOLOGY
Volume 10, Issue 11, Pages 1937-1945Publisher
SPRINGER
DOI: 10.1007/s11947-017-1957-5
Keywords
Chitosan; Defense response; Fruit quality; Kiwifruit; Postharvest decay
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Funding
- National Natural Science Foundation of China [31600128, 31500131]
- Innovation Team Project [LT2015011]
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Chitosan is an eco-friendly alternative to synthetic fungicides for managing postharvest decay of fruits and vegetables. The ability of chitosan to enhance resistance to postharvest gray (Botrytis cinerea) and blue mold (Penicillium expansum) in kiwifruit was investigated. The gene expression and activity of antioxidant enzymes, and total phenolic compounds were determined. Results showed that chitosan at 5 g/L significantly inhibited gray and blue mold in kiwifruit stored at 25 and 4 degrees C. Chitosan significantly induced the gene expression of catalase, superoxide dismutase, and ascorbate peroxidase, as well as increased the enzyme activity. Moreover, chitosan markedly increased the content of total phenolic compounds in kiwifruit. Importantly, chitosan also exhibited beneficial effects on fruit quality. Taken together, the ability of chitosan to reduce mold in stored kiwifruit may be associated with the elicitation of host defense response. These results have practical implications for the application of chitosan to reduce postharvest losses.
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