College of Biosystem Engineering and Food Science, Zhejiang University, Hangzhou, 310058, PR China; Department of Nutrition & Food Science, National Research Centre, Dokki, Giza, 12622, Egypt.
Department of Food Science and Technology, Faculty of Agriculture, Bayero University Kano, P.M.B.3011, Kano State, Nigeria.
Plant Physiol Biochem. 2023 Jul;200:107752. doi: 10.1016/j.plaphy.2023.107752. Epub 2023 May 15.
Carbon dioxide (CO) is considered one of the eco-related key factors that negatively affect global climatic change. Also, CO can play an important role in the postharvest quality of the agri-products. In this study, the impact of CO on the quality of postharvest onions that were stored at 23 °C for 8 weeks was investigated. The weight loss, phenolic, flavonoid, flavanol, anthocyanin, antioxidant activity, and soluble sugar were analyzed during the study period. The results showed that 20% CO treatment was significantly (P > 0.05) more effective than 15% CO and control in inhibiting weight loss. Additionally, 20% CO treatment significantly retained higher antioxidant enzyme activities such as CAT, APX, and SOD than 15% CO and control. During storage, 20% CO treatment significantly (P < 0.05) improved glucose, fructose, and sucrose levels by more than 15% CO exposure and control groups. Besides the chlorogenic acid, kaempferol and quercetin were significantly (P < 0.05) higher in the 20% CO than in the 15% CO after 2 weeks of storage. In conclusion, this study's novelty comes from the broad prospects of using CO for maximizing the stored onion phytochemical functionality that is usually affected by the room temperature long storage. This will help in the onion shelf-life extension by considering the quality-related attributes.
二氧化碳（CO）被认为是对全球气候变化产生负面影响的生态相关关键因素之一。此外，CO 在农产品的采后品质中也能发挥重要作用。本研究探讨了 CO 对在 23°C 下贮藏 8 周的洋葱采后品质的影响。在研究期间分析了失重率、酚类物质、类黄酮、黄烷醇、花青素、抗氧化活性和可溶性糖。结果表明，20%CO 处理在抑制失重方面明显（P＞0.05）优于 15%CO 和对照。此外，20%CO 处理显著保持了更高的抗氧化酶活性，如 CAT、APX 和 SOD，优于 15%CO 和对照。在贮藏过程中，20%CO 处理通过提高葡萄糖、果糖和蔗糖水平，显著（P＜0.05）优于 15%CO 暴露组和对照组。此外，在贮藏 2 周后，20%CO 处理组的绿原酸、山奈酚和槲皮素明显（P＜0.05）高于 15%CO 处理组。总之，本研究的新颖之处在于广泛应用 CO 来最大限度地提高通常受室温长期贮藏影响的贮藏洋葱植物化学功能的前景。通过考虑与质量相关的属性，可以延长洋葱的货架期。
