Journal
FOOD CHEMISTRY
Volume 268, Issue -, Pages 188-195Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.foodchem.2018.06.088
Keywords
Ceratocystis fimbriata; Sweet potato; Chitosan; Antimicrobial; Postharvest
Funding
- National Natural Science Foundation of China [31101502, 31400099]
- Qing Lan Project of Jiangsu Province (2014)
- China Agriculture Research System [CARS-10-B03]
- Priority Academic Program Development of Jiangsu Higher Education Institutions (PAPD)
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The inhibitive effects of chitosan on black rot disease caused by Ceratocystis fimbriata in sweet potato tuber root (TR) were evaluated. The results demonstrated that chitosan effectively inhibited the mycelial growth and spore germination of C. fimbriata and directly led to the cell necrosis. Chitosan altered the chitin deposition and influenced the fatty acid composition of C. fimbriata. The application of chitosan effectively controlled the C. fimbriata development in sweet potato TRs 17 days of storage 25 degrees C. Phenylalanine ammonia lyase (PAL) and superoxide dismutase (SOD) activity were clearly enhanced by the chitosan treatment, while the malondialdehyde (MDA) production was not increased. These findings suggest that chitosan effectively controlled the infection of C. fimbriata in sweet potato TRs owing to its antifungal and eliciting properties, which induced some defense responses during storage.
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