Spraying chitosan on cassava roots reduces postharvest deterioration by promoting wound healing and inducing disease resistance.
Spraying chitosan on cassava roots reduces postharvest deterioration by promoting wound healing and inducing disease resistance.
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DOI：
10.1016/j.carbpol.2023.121133
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发表时间：
2023-10
影响因子：
11.2
通讯作者：
Congcong Wang;Yinhua Chen;Songbi Chen;Yi Min;Yanqiong Tang;Xiang Ma;Hong Li;Juanjuan Li;
中科院分区：
文献类型：
--
作者：
Congcong Wang;Yinhua Chen;Songbi Chen;Yi Min;Yanqiong Tang;Xiang Ma;Hong Li;Juanjuan Li;
采后损害使木薯根容易受到病原体感染和腐烂，这严重阻碍了木薯产业的发展。本研究的目的是评估壳聚糖的体外抗菌性能，以及其对木薯根伤口愈合和抗性的影响。结果表明，随着壳聚糖浓度的增加，其抑菌效果越来越明显。0.5 mg/mL浓度的壳聚糖可显著抑制紫花苜蓿的萌发。掌状气孔及其结构的损伤。此外，壳聚糖激活了木薯根中与苯丙烷代谢途径相关的关键基因转录和酶活性，从而促进木质素快速积累，导致断裂层的早期形成。壳聚糖还通过促进致病相关蛋白的表达以及黄酮类和总酚类物质的积累，增强了木薯根系的抗性。接种48 h后，经壳聚糖处理的木薯SC9和SC6品种的根系损伤面积分别减少了51.4%和53.4%。本研究结果为管理木薯根采后变质提供了一种新的方法。
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 chitosanin 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 ofP. palmivoraspores 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.