Investigation of different nanoemulsion coatings to prevent anthracnose and maintain quality parameters during storage of Irwin mango
Ying-Che Lee, Meng-Chieh Yu, Jyh-Shyan Tsay, Chih‐Yao Hou, Ping‐Hsiu Huang, Yu-Shen Liang
Abstract
Mango (Mangifera indica) is a typical perennial fruit, namely, post-ripening quality deterioration rapidly aging, caused by anthracnose during storage, the primary issue of quality deterioration and decreased shelf life. In addition, the marketplace has heightened awareness of the benefits of healthy dietary choices, generating excellent consumer attention to foods or ingredients derived from various natural bioactive compounds. This study examined the impact of coating nanoemulsion (NE) with naturally occurring essential oil (EO; 2 g/100 mL thyme oil), citrus EOs component (2 g/100 mL d-limonene), and a combination of the two on anthracnose incidence and disease index of Irwin mangoes. These trials were conducted by storing mangoes after postharvest treatment for 30 days at 10 °C. In addition, this study evaluated the effects of NE coatings on physiological (respiration rate and ethylene production) and quality-related indicators (fruit appearance, polygalacturonase (PG) activity, firmness, total soluble solids (TSS) and titratable acid (TA) content) of mango. This study showed that 2 g/100 mL thyme oil NE could inhibit Colletotrichum gloeosporioides mycelial development by 50% (in vitro). Meanwhile, the coated mangoes showed significantly lower anthracnose incidence and incidence index during the storage period while maintaining certain quality-related indexes, effectively extending Irwin mango shelf-life in refrigerated storage.