Polypropylene crisper and 1-MCP delay the softening,lignification and transcription levels of related enzyme genes of golden needle mushrooms(Flammulina velutipes)  

作　　者：WANG Wen-jun LI Yao LI Fu-hua ZENG Kai-fang MING Jian 

机构地区：[1]College of Food Science,Southwest University,Chongqing 400715,P.R.China [2]Research Center of Food Storage&Logistics,Southwest University,Chongqing 400715,P.R.China

出　　处：《Journal of Integrative Agriculture》2022年第1期249-260,共12页农业科学学报（英文版）

基　　金：supported by the National Natural Science Foundation of China(31471576);the Chongqing Science and Technology Commission,China(cstc2015shmszx80019)。

摘　　要：The fresh postharvest golden needle mushroom(Flammulina velutipes) sporocarp has a high moisture content and crisp texture, but it still has high physiological activity and respiration, leading to senescence and quality deterioration.Treatments with 1-methylcyclopropene(1-MCP) and polypropylene(PP) crispers were used to study the changes of lignification and softening of F. velutipes during storage. The main findings were as follows: the crisper packaging could effectively prolong the storage time of F. velutipes;either the 1-MCP treatment, crisper packaging or the combination of the two treatments could significantly inhibit the accumulation of lignin and the decreases in the contents of cellulose and pectin, and had certain inhibitory effects on the activities of enzymes involved in lignification and softening including phenylalanine ammonia-lyase(PAL), cinnamyl alcohol dehydrogenase(CAD), cellulase(Cx), pectin methylesterase(PME) and polygalacturonase(PG). Among them, the inhibitory effect of the crisper packaging was higher than the 1-MCP treatment, while the combination of the two treatments was the best. The results of transmission electron microscopy(TEM) and scanning electron microscopy(SEM) showed that the crisper packaging in combination with the 1-MCP treatment could effectively maintain the integrity and stability of the F. velutipes cellular structure and inhibit the emergence of plasmolysis to prevent cell membrane rupture. The transcription levels showed that the crisper packaging and the combination of the 1-MCP treatment and crisper packing could effectively affect the expression of genes for enzymes related to lignification and softening of F. velutipes. In conclusion, 1-MCP and PP crispers could delay the lignification and softening of F. velutipes during storage.

关 键 词：Flammulina velutipes polypropylene crisper 1-MCP softening and lignification transcription levels 

分 类 号：TS219[轻工技术与工程—粮食、油脂及植物蛋白工程]