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 °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.

评价了壳聚糖对甘薯块根（TR）中毛囊孢菌引起的黑腐病的抑制作用。结果表明，脱乙酰壳多糖有效地抑制菌丝生长和孢子萌发C.黑斑病和直接导致细胞坏死。壳聚糖改变了几丁质的沉积，影响了C. fimbriata的脂肪酸组成。壳聚糖的应用有效地控制了纤毛衣藻甘薯TRs的发育在25°C下可存放17天。壳聚糖处理明显增强了苯丙氨酸氨裂合酶（PAL）和超氧化物歧化酶（SOD）的活性，而丙二醛（MDA）的产量却没有增加。这些结果表明，壳聚糖有效地控制感染C.鳅由于其抗真菌和引发性，在储存过程中引起的一些防御反应红薯RS。