Effect of 1-Methylcyclopropene and Ethephon on Physiological and Softening Related Indexes of Pyrus ussuriensis During Storage

doi:10.7668/hbnxb.20191938

Abstract

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

CLC Number:

S661.01

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.

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