Spraying chitosan on cassava roots reduces postharvest deterioration by promoting wound healing and inducing disease resistance
文献类型： 外文期刊
作者： Wang, Congcong 1 ; Chen, Yinhua 2 ; Chen, Songbi 3 ; Min, Yi 1 ; Tang, Yanqiong 1 ; Ma, Xiang 1 ; Li, Hong 1 ; Li, Juanjuan 1 ; Liu, Zhu 1 ;
作者机构： 1.Hainan Univ, Sch Life Sci, Haikou 570228, Peoples R China
2.Hainan Univ, Coll Trop Crops, Hainan Key Lab Sustainable Utilizat Trop Bioresour, Haikou 570228, Hainan, Peoples R China
3.Chinese Acad Trop Agr Sci, Minist Agr Germplasm Resources Conservat & Utiliza, Trop Crops Genet Resources Inst, Key Lab, Hainan, Peoples R China
关键词： Cassava; Chitosan; Postharvest deterioration; Wound healing; Induced resistance
期刊名称：CARBOHYDRATE POLYMERS （ 影响因子：11.2； 五年影响因子：10.2 ）
ISSN： 0144-8617
年卷期： 2023 年 318 卷
页码：
收录情况： SCI
摘要： Postharvest damage makes cassava roots vulnerable to pathogen infections and decay, which significantly hinders the development of the cassava industry. The objective of this study was to assess the antibacterial properties of chitosan in vitro, as well as its effect on wound healing and resistance in cassava roots. The findings demonstrated that the bacteriostatic effect of chitosan became increasingly prominent as the concentration of chitosan enhanced. Chitosan at a concentration of 0.5 mg/mL was revealed to significantly inhibit the germination of P. palmivora spores and damage to their structure. Moreover, chitosan activated the transcription of crucial genes and enzyme activities associated with the phenylpropane metabolism pathway in cassava roots, thus promoting rapid lignin accumulation and resulting in the early formation of a fracture layer. Chitosan was also found to enhance cassava root resistance by promoting the expression of pathogenesis-related proteins and the accumulation of flavonoids and total phenols. After 48 h of inoculation, cassava roots treated with chitosan exhibited a 51.4 % and 53.4 % decrease in lesion area for SC9 and SC6 varieties, respectively. The findings of this study offer a novel approach for managing postharvest deterioration of cassava roots.
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