The current study explores innovative strategies for extending the postharvest shelf life of guava under high humidity and temperature conditions prevalent in sub-tropical regions with composite edible coatings to guava fruits and analyzing their impact on key physiological parameters. Results reveal that the composite Olive oil with texture enhancer + Antioxidant (OTE + AO) treatment consistently maintained superior fruit firmness throughout storage, with a remarkable reduction in softening by 34.3% compared to uncoated controls. Composite edible coatings viz. Olive oil with texture enhancer (OTE), Sodium alginate with texture enhancer + Antioxidant (STE + AO), and Aloe vera with texture enhancer + Antioxidant (ATE + AO) exhibited elevated titratable acidity levels on the third day of storage, surpassing the control by 10–15%, indicating potential for extended shelf life. Moreover, coated fruits exhibited sustained total sugar levels, with OTE + AO treatment demonstrating a significant 8.5% increase compared to controls after fifteen days. Notably, the OTE + AO and OTE treatments showcased the least decline in total flavonoid content throughout storage, maintaining 12–15% higher levels than uncoated counterparts. These displayed substantial efficacy in mitigating polyphenol oxidase activity, reducing enzymatic browning by 32.7–34.3%. Preserving superoxide dismutase activity in coated treatments, resulting in 10–15% increased levels, indicates enhanced antioxidant defence systems. This study’s results have found the possibility of extending guava’s shelf life with optimum biochemical properties with composite coatings.

目前的研究探索了在亚热带地区普遍存在的高湿度和温度条件下延长番石榴采后保质期的创新策略，对番石榴果实进行复合可食用涂层，并分析其对关键生理参数的影响。结果表明，经过质构增强剂 + 抗氧化剂 (OTE + AO) 处理的复合橄榄油在整个储存过程中始终保持优异的果实硬度，与未涂层的对照组相比，软化率显着降低了 34.3%。复合食用涂层即。含有质构增强剂的橄榄油 (O​​TE)、含有质构增强剂 + 抗氧化剂的海藻酸钠 (STE + AO) 和含有质构增强剂 + 抗氧化剂的芦荟 (ATE + AO) 在储存的第三天表现出升高的可滴定酸度水平，超过了对照10-15%，表明有延长保质期的潜力。此外，涂层水果表现出持续的总糖水平，OTE + AO 处理显示与对照组相比，15 天后显着增加了 8.5%。值得注意的是，OTE + AO 和 OTE 处理在整个储存过程中总黄酮含量下降幅度最小，比未包衣处理的同类产品保持高 12-15% 的水平。这些在减轻多酚氧化酶活性方面表现出显着的功效，将酶促褐变减少了 32.7-34.3%。在涂层处理中保留超氧化物歧化酶活性，导致水平增加 10-15%，表明抗氧化防御系统增强。这项研究的结果发现，复合涂层可以延长番石榴的保质期，并具有最佳的生化特性。