Khalil Uzman, Rajwana Ishtiaq A, Razzaq Kashif, Singh Shehbaz, Sarkhosh Ali, Brecht Jeffrey K
Department of Horticulture MNS-University of Agriculture Multan Pakistan.
Horticultural Sciences Department University of Florida Gainesville Florida USA.
Food Sci Nutr. 2024 Mar 18;12(5):3663-3673. doi: 10.1002/fsn3.4037. eCollection 2024 May.
Muscadine grapes ( Michx.) are delicate in nature with short shelf life. Postharvest technologies like modified atmosphere packaging (MAP) with reduced oxygen (O) and elevated carbon dioxide (CO) could increase the postharvest storage life with better quality. In the current experiment, physical and biochemical quality attributes of black and bronze cultivars of muscadine grapes ('Supreme' and 'Granny Val', respectively) were evaluated in active MAP. Fruit were packed in plastic trays, sealed with impermeable film, and CO was introduced into the package. The MAP was created by a rigid microperforated plastic patch coated with a proprietary semipermeable resin, which was applied over a hole in the tray; packages with the same size hole without a patch were the control. Fruit were stored at 4°C for 42 days (6 weeks). MAP resulted in significantly lower decay incidence and better retention of fruit firmness for up to 28 days of storage in both cultivars as well as reducing color changes in 'Supreme' fruit. Although MAP did not affect the biochemical quality of muscadine grapes, total antioxidants increased initially and then decreased during storage, irrespective of packaging treatments. A significant linear increase in total phenolic content was also found during storage, regardless of treatments applied. Overall, the results of the current study demonstrate that MAP can be an affective technology to increase storage duration of muscadines with better retention of physical quality, without affecting the biochemical attributes.
圆叶葡萄（Michx.）生性娇弱，货架期短。诸如采用降低氧气（O）和提高二氧化碳（CO₂）的气调包装（MAP）等采后技术，可以延长采后储存期并保持更好的品质。在当前实验中，对圆叶葡萄的黑色和青铜色品种（分别为“至尊”和“格兰妮·瓦尔”）在主动气调包装中的物理和生化品质属性进行了评估。果实装在塑料托盘中，用不透性薄膜密封，并向包装中引入CO₂。气调包装是通过在托盘上的一个孔上覆盖一块涂有专利半透性树脂的刚性微孔塑料贴片来实现的；在相同大小的孔上没有贴片的包装作为对照。果实于4°C下储存42天（6周）。气调包装使两个品种在长达28天的储存期内腐烂发生率显著降低，果实硬度保持得更好，同时减少了“至尊”品种果实的颜色变化。尽管气调包装没有影响圆叶葡萄的生化品质，但无论包装处理如何，总抗氧化剂在储存期间先增加后减少。在储存期间还发现总酚含量显著线性增加，与所采用的处理方式无关。总体而言，当前研究结果表明，气调包装可以成为一种有效的技术，在不影响生化属性的情况下，延长圆叶葡萄的储存期并更好地保持其物理品质。
