乳酸钙浸渍与紫外线C照射相结合可保持鲜切猕猴桃片的品质并提高其抗氧化能力。

Combination of calcium lactate impregnation with UV-C irradiation maintains quality and improves antioxidant capacity of fresh-cut kiwifruit slices.

作者信息

Hu Xiaomin, Chen Yi, Wu Xinye, Liu Wenxin, Jing Xianyu, Liu Yaowen, Yan Jing, Liu Shuxiang, Qin Wen

机构信息

College of Food Science, Sichuan Agricultural University, Ya'an 625014, PR China.

Institute of Food Processing and Safety, Sichuan Agricultural University, Ya'an 625014, PR China.

出版信息

Food Chem X. 2022 May 13;14:100329. doi: 10.1016/j.fochx.2022.100329. eCollection 2022 Jun 30.

This study investigated the combined effects of calcium lactate (CA-L, 3 g L) and shortwave ultraviolet (UV-C, 4.0 kJ m) irradiation on quality attributes and antioxidant defense capacity of fresh-cut kiwifruits at refrigerated storage for 7 d. The results indicated that CA-L and UV-C joint treatment, compared to either treatment alone, alleviated microbial load, showed higher quality on ascorbic acid (AsA), green color, total chlorophyll, flesh hardness, total sugar, total acid and malonaldehyde (MDA) content. Besides, it inhibited and •OH generation, induced HO production, improved the activity of antioxidant enzymes (SOD, CAT and APX), activated critical enzymes (PAL, C4H and 4CL) in phenylpropanoid metabolism pathway and further enhanced total phenolic and proanthocyanidin content. Above results demonstrated that UV-C together with CA-L treatment could synergistically maintain overall quality and improve antioxidant capacity of kiwifruit slices. Therefore, the combination of CA-L and UV-C treatment showed a potential practical application in fresh-cut kiwifruits.

本研究调查了乳酸钙（CA-L，3 g/L）和短波紫外线（UV-C，4.0 kJ/m²）照射对冷藏7天的鲜切猕猴桃品质特性和抗氧化防御能力的联合影响。结果表明，与单独的任何一种处理相比，CA-L和UV-C联合处理减轻了微生物负荷，在抗坏血酸（AsA）、绿色、总叶绿素、果肉硬度、总糖、总酸和丙二醛（MDA）含量方面表现出更高的品质。此外，它抑制了超氧阴离子（O₂⁻•）和羟自由基（•OH）的产生，诱导了过氧化氢（H₂O₂）的产生，提高了抗氧化酶（超氧化物歧化酶、过氧化氢酶和抗坏血酸过氧化物酶）的活性，激活了苯丙烷代谢途径中的关键酶（苯丙氨酸解氨酶、肉桂酸4-羟化酶和4-香豆酸辅酶A连接酶），并进一步提高了总酚和原花青素含量。上述结果表明，UV-C与CA-L处理可协同维持猕猴桃片的整体品质并提高其抗氧化能力。因此，CA-L和UV-C处理的组合在鲜切猕猴桃中显示出潜在的实际应用价值。