Grapefruit seed extract (GSE)-containing chitosan-based coating was developed and applied to cherry tomatoes to protect them from Salmonella invasion and improve their storability. The coating colloids were produced by mixing a chitosan colloid (1% [w/w] chitosan) with GSE at various concentrations (0.5%, 0.7%, 1.0%, and 1.2% [w/w]) using high-shear mixing (10000 rpm, 2 min). Coatings with chitosan colloids containing GSE at 0.0%, 0.5%, 0.7%, and 1.0% (w/w) inactivated Salmonella on cherry tomatoes by 1.0 ± 0.3, 1.2 ± 0.3, 1.6 ± 0.1, and 2.0 ± 0.3 log CFU/cherry tomato, respectively. Coatings both with and without GSE (1.0%) effectively inhibited the growth of Salmonella and total mesophilic aerobes, reduced CO2 generation, and retarded titratable acidity decrease during storage at 10 and 25 °C. The advantage of incorporating GSE in the formulation was demonstrated by delayed microorganism growth and reduced weight loss at 25 °C. The chitosan-GSE coating did not affect lycopene concentration, color, and sensory properties (P > 0.05). Chitosan-GSE coating shows potential for improving the microbiological safety and storability of cherry tomatoes, with stronger efficacy at 25 °C than that of chitosan coating without GSE. PRACTICAL APPLICATION A novel chitosan coating containing grape fruit seed extract (GSE) improved the microbiological safety against Salmonella and storability of cherry tomatoes without altering their flavor, demonstrating its strong potential as an effective postharvest technology. Chitosan coating containing GSE might be preferable over chitosan coating without GSE for application to tomatoes that are stored at room temperature in that it more effectively inhibits microbial growth and weight loss than the coating without GSE at 25 °C.

中文翻译：

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使用含有葡萄柚籽提取物的壳聚糖基胶体的可食用涂层，用于樱桃番茄的安全和保鲜

开发了含有葡萄柚籽提取物 (GSE) 的壳聚糖涂层，并将其应用于樱桃番茄，以保护它们免受沙门氏菌入侵并提高其储存性。通过使用高剪切混合（0.5%、0.7%、1.0% 和 1.2% [w/w]）混合壳聚糖胶体（1% [w/w] 壳聚糖）与 GSE 10000 转/分钟，2 分钟）。用含有 0.0%、0.5%、0.7% 和 1.0% (w/w) 的 GSE 壳聚糖胶体的涂层在樱桃番茄上灭活沙门氏菌 1.0 ± 0.3、1.2 ± 0.3、1.6 ± 0.1 和 2.0 ± 0.3 log CFU/樱桃番茄，分别。含和不含 GSE (1.0%) 的涂料在 10 和 25 °C 储存期间均有效抑制了沙门氏菌和总中温需氧菌的生长，减少了 CO2 的产生，并延缓了可滴定酸度的降低。在配方中加入 GSE 的优势体现在延迟微生物生长和减少 25 °C 时的重量损失。壳聚糖-GSE涂层不影响番茄红素浓度、颜色和感官特性（P > 0.05）。壳聚糖-GSE 涂层显示出改善樱桃番茄微生物安全性和储存性的潜力，在 25°C 下的功效比没有 GSE 的壳聚糖涂层更强。实际应用 一种含有葡萄果实种子提取物 (GSE) 的新型壳聚糖涂层提高了抗沙门氏菌的微生物安全性和樱桃番茄的可储存性而不改变其风味，证明了其作为一种有效的采后技术的巨大潜力。