气调保鲜条件下广叶绣球菌贮藏期理化指标变化规律

以广叶绣球菌Sparassis latifolia子实体为供试材料,对其进行定向聚丙烯（oriented polypropylene,OPP）膜气调包装,贮藏在4℃环境中,测定其在0、4、8、12、16、20、24d各时间点的理化指标。结果表明,广叶绣球菌失重率、色差随着贮藏时间的延长逐渐升高。营养成分总糖和还原糖含量减少,总蛋白和可溶性蛋白呈现出不断分解合成的动态变化过程,游离氨基酸含量增加。活性成分总酚含量先降低后升高,总葡聚糖含量减少,β-葡聚糖、麦角甾醇含量先增加后减少。贮藏过程中形态和活性成分的变化情况能间接表明采后品质所处阶段。相关气调包装低温贮藏下广叶绣球菌理化指标变化规律可为后续改进保鲜方法、提高贮藏期营养价值奠定理论基础。

Variation of physicochemical indexes during storage of Sparassis latifolia under modified atmosphere preservation

The fruiting body of Sparassis latifolia was packaged with oriented polypropylene (OPP) film and stored at 4°C, and the physicochemical indexes of the fruiting body were measured in 0, 4, 8, 12, 16, 20 and 24d. The results showed that the weight loss and color difference of Sparassis latifolia increased with the increase of storage time. The content of total sugar and reducing sugar decreased; the total protein and soluble protein content were in a dynamic change process of continuous decomposition and synthesis and the total free amino acid content increased. The total phenol content decreased first and then increased; the total glucan content decreased; the β-glucan and ergosterol content increased first and then decreased. The changes of morphology and active components during storage can indirectly indicate the stage of postharvest quality. The changes of physicochemical indexes of Sparassis latifolia under low temperature storage with modified atmosphere packaging can lay a foundation for subsequent improvement of preservation methods and improvement of nutritional value during storage.