Tianjin Key Laboratory of Food Biotechnology, Tianjin University of Commerce, Tianjin, China.
J Sci Food Agric. 2024 Jan 15;104(1):400-408. doi: 10.1002/jsfa.12932. Epub 2023 Sep 7.
Agaricus bisporus with a completely white appearance is popular with consumers. However, A. bisporus is susceptible to senescence and spoilage, which results in browning and oxidative tissue damage, with limited shelf life. This study investigated the effects of shortwave ultraviolet (UV-C, 1.0 kJ m ) irradiation on quality features, enzymatic browning, and defense properties of A. bisporus stored at 4 °C for 21 days.
After storage, UV-C irradiated A. bisporus had increased quality of sensory, color and hardness characteristics; it exhibited higher content of total phenolic, brown melanin precursors, including γ-glutaminyl-4-hydroxybenzene, γ-glutaminyl-3,4-dihydroxybenzene and tyrosine, lower accumulation of malondiadehyde, hydrogen peroxide and superoxide radical, and maintained membrane integrity in comparison to control samples. Besides, A. bisporus treated by UV-C showed lower degree of browning and higher level of self-defense capacity, which may be ascribed to the enhancement in activities of superoxide dismutase, catalase, phenylalanine ammonia lyase, chitinase and β-1,3-glucanase activity, while inhibiting polyphenol oxidase activity during storage.
These results indicate that the higher self-defense capacity with UV-C treatment might be the mechanism associated with the delay of senescence in Agaricus bisporus. Therefore, UV-C treatment is suggested as a potential practical application in mushrooms. © 2023 Society of Chemical Industry.
具有完全白色外观的双孢蘑菇很受消费者欢迎。然而，双孢蘑菇容易衰老和变质，导致褐变和氧化组织损伤，货架期有限。本研究调查了短波紫外线（UV-C，1.0 kJ m ）照射对在 4°C 下储存 21 天的双孢蘑菇的质量特性、酶促褐变和防御特性的影响。
贮藏后，UV-C 辐照的双孢蘑菇具有更好的感官、颜色和硬度特性；它表现出更高的总酚含量、棕色黑色素前体，包括 γ-谷氨酰基-4-羟基苯、γ-谷氨酰基-3,4-二羟基苯和酪氨酸，较低的丙二醛、过氧化氢和超氧自由基积累，以及与对照样品相比保持膜完整性。此外，与对照样品相比，UV-C 处理的双孢蘑菇褐变程度较低，自我防御能力较高，这可能归因于超氧化物歧化酶、过氧化氢酶、苯丙氨酸解氨酶、几丁质酶和β-1,3-葡聚糖酶活性的增强，同时抑制多酚氧化酶活性在储存过程中。
这些结果表明，UV-C 处理后具有更高的自我防御能力可能是与双孢蘑菇衰老延迟相关的机制。因此，UV-C 处理被建议作为蘑菇的一种潜在实际应用。 © 2023 化学工业协会。
