Journal of Integrative Agriculture ›› 2022, Vol. 21 ›› Issue (1): 249-260.DOI: 10.1016/S2095-3119(21)63764-4

所属专题: 食品科学合辑Food Science

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  • 收稿日期:2020-09-08 接受日期:2021-06-10 出版日期:2022-01-01 发布日期:2022-01-02

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

WANG Wen-jun1*, LI Yao1*, LI Fu-hua1, ZENG Kai-fang1, 2, MING Jian1, 2   

  1. 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
  • Received:2020-09-08 Accepted:2021-06-10 Online:2022-01-01 Published:2022-01-02
  • About author:WANG Wen-jun, Tel: +86-23-68251298, E-mail: wangwenjun_w@outlook.com; Correspondence MING Jian, Tel: +86-23-68251298, E-mail: mingjian1972@163.com * These authors contributed equally to this study.
  • Supported by:
    This research was supported by the National Natural Science Foundation of China (31471576), and the Chongqing Science and Technology Commission, China (cstc2015shmszx80019).

摘要:

采后新鲜金针菇孢含水量高,质地脆嫩,仍具有较高的生理活性和呼吸作用,从而极易发生衰老和品质劣化。本研究使用1-甲基环丙烯(1-MCP)和聚丙烯(PP)保鲜盒处理金针菇,分析了金针菇在贮藏过程中木质化和软化的变化情况。主要研究结果如下:PP保鲜盒包装能有效地延长金针菇的贮藏时间;1-MCP处理、PP保鲜盒包装及两种处理组合均能显著抑制木质素的积累,并降低纤维素、果胶含量,对木质化及软化相关酶(苯丙氨酸解氨酶(PAL)、肉桂醇脱氢酶(CAD)、纤维素酶(Cx)、果胶甲基酯酶(PME)和聚半乳糖醛酸(PG)活性有一定的抑制作用。其中,PP保鲜盒包装的抑制效果高于1-MCP处理,且两种处理组合效果最好。透射电镜(TEM)和扫描电镜(SEM)结果表明,PP保鲜盒包装和1-MCP处理相结合能有效地保持金针菇细胞结构的完整性和稳定性,防止质膜分离及细胞膜破裂。转录水平分析结果表明,PP保鲜盒包装和1-MCP处理相结合,能明显影响金针菇木质化和软化相关酶基因的表达。综上,1-MCPPP保鲜盒包装可以有效的延缓金针菇在贮藏过程中的木质化和软化现象,延长贮藏期。

Abstract: 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 Fvelutipes.  In conclusion, 1-MCP and PP crispers could delay the lignification and softening of F. velutipes during storage.

Key words: Flammulina velutipes ,  polypropylene crisper , 1-MCP , softening and lignification , transcription levels

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