不同薄膜包装对杏鲍菇采后衰老生理的影响

Effects of Different Film Packaging on the Postharvest Senescence Physiology of Pleurotus eryngii

以"杏鲍菇"为试材,研究了[32.7μm聚乙烯袋(MA1),19.1μm的聚乙烯袋(MA2),32.7μm的带孔聚乙烯袋(CK)]3种不同薄膜包装对杏鲍菇采后衰老及品质的影响。结果表明:在20～25℃条件贮藏2 d时,CK杏鲍菇表面出现大面积的褐变,失去了商品价值;而MA1和MA2薄膜包装处理可将杏鲍菇采后的货架寿命延长至8 d。在采后8 d的贮藏期间,与MA1相比,MA2处理可减缓杏鲍菇原果胶含量的下降,抑制膜透性和MDA含量的增加,维持较高的纤维素酶和多聚半乳糖醛酸酶;另外,MA2处理可减缓杏鲍菇粗纤维含量的增加幅度,维持较高的可滴定酸含量,但对VC含量的影响不显著。说明MA2薄膜包装延缓杏鲍菇采后衰老的效果明显。

This experiment studied the influence of three film packaging [32.7μm polyethylene bag （MA1）, 19.1μm polyethylene bag （MA2）, 32.7μm polyethylene bag with four holes （CK） ] on the postharvest senescence and quality of Pleurotus eryngii. The results showed that brown spots appeared on the surface of Pleurotus eryngii trea- ted with CK, and in consequence these Pleurotus eryngii lost edible value after 2 days of storage in 20 - 25℃. While the film packages of MA1 and MA2 could significantly prolong the shelf life of Pleurotus eryngii. In comparison with MA1, the treatment of MA2 could slow down the decrease of protopectin content, suppress the increase of membrane permeability and MDA content and keep the higher activity of cellulose and polygalacturonase of Pleurotus eryngii dur- ing storage for 8 days. In addition, the treatment of MA2 could alleviate the increase of crude fibre content and keep a higher content of titratable acid, but the effect on Vc content was not significant. It was suggested that the film package of MA2 could relieve the senescence of Pleurotus eryngii.