Antifungal and eliciting properties of chitosan against Ceratocystis fimbriata in sweet potato

作者：Xing, Ke^*; Li, Teng Jie; Liu, Yuan Fang; Zhang, Jian; Zhang, Yu; Shen, Xiao Qiang; Li, Xiao Yan; Miao, Xiang Min; Feng, Zhao Zhong; Peng, Xue; Li, Zong Yun; Qin, Sheng^*

来源：Food Chemistry, 2018, 268: 188-195.

DOI：10.1016/j.foodchem.2018.06.088

• Ceratocystis fimbriata
• Sweet potato
• Chitosan
• Antimicrobial
• Postharvest

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.

• 出版日期2018-12-1
• 单位东北林业大学