1-MCP和乙烯利对秋子梨采后生理及软化相关指标的影响

doi:10.7668/hbnxb.20191938

摘要/Abstract

摘要： 研究1-MCP和乙烯利处理对5种秋子梨（20±1）℃常温贮藏期间主要生理及软化相关指标的影响，探讨1-MCP和乙烯利对秋子梨品种软化机理的调控，为控制秋子梨果实后熟软化进程提供理论依据。以南果梨、京白梨、花盖梨、尖把梨和安梨5种秋子梨为试材，分别用浓度为0.5 μL/L的1-MCP密闭熏蒸24 h和1.0 g/kg的乙烯利溶液浸泡5 min，比较常温（（20±1）℃）贮藏期间果实硬度、可溶性固形物（SSC）、可滴定酸（TA）、维生素C（Vc）、呼吸强度、乙烯释放量等生理品质指标以及水溶性果胶、纤维素、淀粉含量、β-半乳糖苷酶（β-Gal）、淀粉酶（AM）、多聚半乳糖醛酸酶（PG）、纤维素酶（CL）等软化相关指标变化。与对照（CK）组相比，1-MCP处理可明显延缓5种秋子梨果实硬度、水溶性果胶（WSP）、纤维素、呼吸强度、乙烯释放量和淀粉含量的减少，降低了PG、β-Gal、CL、AM酶活性，而乙烯利处理组与对照组差异较小。1-MCP处理可通过抑制细胞壁相关降解酶活性和减少乙烯释放量来减轻细胞壁物质的降解，从而有效延缓秋子梨果实软化进程，而乙烯利对果实贮藏过程中软化和细胞壁降解生理变化无明显影响。

关键词: 秋子梨, 后熟软化, 细胞壁降解, 1-甲基环丙烯, 乙烯利

Abstract: The effects of 1-MCP and ethephon on the main physiological quality indexes and softening related indexes of Postharvest Pyrus ussuriensis during normal temperature storage were studied, and the mechanism of 1-MCP and ethephon on softening regulation of Pyrus ussuriensis was discussed, so as to provide theoretical basis for regulating the ripening and softening process of Pyrus ussuriensis. Five kinds of Pyrus ussuriensis, Nanguo pear, Jingbai pear, Huagai pear, Jianba pear and An pear, were fumigated with 0.5 μL/L 1-MCP for 24 h and 1.0 g/kg ethephon solution respectively. The changes of fruit firmness, respiration rate, ethylene production, soluble solids, titratable acid, vitamin C content, water-soluble pectin, cellulose, starch content and softening related enzyme activities of polygalacturonase(PG), β-galactosidase(β-Gal), cellulase(CL)and amylase(AM)were studied during normal temperature storage((20±1)℃). 1-MCP treatment significantly delayed the decline of firmness, ethylene production, respiration rate, water soluble pectin(WSP), cellulose and starch content of Pyrus ussuriensis, and decreased the activities of PG, β-Gal, CL and AM enzyme, but there was little difference between ethephon treatment group and control group. 1-MCP treatment could alleviate the degradation of cell wall substances by inhibiting the activities of cell wall related degrading enzymes and reducing ethylene production, thus effectively delaying the fruit softening process of Pyrus ussuriensis. However, ethephon had no significant effect on the physiological changes of fruit softening and cell wall degradation during storage.

Key words: Pyrus ussuriensis, Ripe-softening, Cell wall degradation, 1-methylcyclopropene, Ethephon

中图分类号:

S661.01

贾朝爽, 王志华, 王文辉, 佟伟. 1-MCP和乙烯利对秋子梨采后生理及软化相关指标的影响[J]. 华北农学报, 2021, 36(S1): 176-187. doi: 10.7668/hbnxb.20191938.

JIA Chaoshuang, WANG Zhihua, WANG Wenhui, TONG Wei. Effect of 1-Methylcyclopropene and Ethephon on Physiological and Softening Related Indexes of Pyrus ussuriensis During Storage[J]. ACTA AGRICULTURAE BOREALI-SINICA, 2021, 36(S1): 176-187. doi: 10.7668/hbnxb.20191938.

http://www.hbnxb.net/CN/Y2021/V36/IS1/176

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