(E)-2-Hexenal-based coating induced acquired resistance in apple and its antifungal effects against Penicillium expansum. (15th June 2022)

• Record Type: Journal Article
• Authors: Wang, Xianghua; Fu, Maorun; Qu, Xiaoqian; Liu, Jingjing; Bu, Jianwen; Feng, Shaoran; Zhao, Handong; Jiao, Wenxiao; Sun, Fei
• Is Part Of: Lebensmittel-Wissenschaft + Technologie =. Volume 163(2022)
• Publication Date: 2022-06-15
• Subjects: E)-2-hexenal -- Microcapsule -- (E)-2-hexenal-based coating -- Salicylic acid signaling pathway; Food industry and trade -- Periodicals; Food -- Composition -- Periodicals; Microbiology -- Periodicals; Nutrition -- Periodicals; 664.005
• DOI: 10.1016/j.lwt.2022.113536
• Languages: English
• ISSNs: 0023-6438

Abstract

Abstract: (E)-2-Hexenal is one of the most prevalent and abundant volatile substances in fruits. Many researchers have attempted fumigation with (E)-2-hexenal to control fungal diseases with poor or no results; the key is the inability to maintain an effective concentration for a long time. Therefore, a new starch-based antifungal coating with (E)-2-hexenal microcapsules was prepared. The obtained results showed that the microcapsule embedding rate reached 78.95% by orthogonal optimization experiments and that the (E)-2-hexenal-based coating was effective at reducing the lesion diameter of apple fruit during storage at 25 °C after Penicillium expansum infection, and in other fruits; it also achieved a good antifungal effect. Moreover, the activities of the main defense-related enzymes and the expression of key genes involved in the salicylic acid (SA) signaling pathway, such as CHI, GLU, PAL, NPR1, and PR1, were enhanced by (E)-2-hexenal-based coating treatment. These findings suggest that the (E)-2-hexenal-based coating has the dual effect of direct antifungal and induction of apple system resistance. E2H-based coating is a promising approach to control postharvest Penicillium expansum in fruit. Highlights: E2H-based coating effectively inhibiting the growth of Penicillium expansum in apple. E2H-based coating antifungal effect is widespread in fruits. E2H-based coating initiates the SA signaling pathway. E2H-based coating induces an increase in the resistance-related genes and enzymes in apple.