Cold pre-treatment is effective for 1-MCP efficacy in ‘Tsugaru’ apple fruit |
| |
| Authors: | Miho Tatsuki Hiroko HayamaHirohito Yoshioka Yuri Nakamura |
| |
| Institution: | National Institute of Fruit Tree Science, NARO, 2-1 Fujimoto, Tsukuba, Ibaraki 305-8605, Japan |
| |
| Abstract: | 1-Methylcyclopropene (1-MCP) treatment maintains apple fruit quality during storage, but its efficacy is dependent on a number of conditions. ‘Tsugaru’ apples are a major early season cultivar in Japan, but because ‘Tsugaru’ fruit produce abundant ethylene, they have a short shelf-life, and efficacy of 1-MCP is not as high with ‘Tsugaru’ as with other cultivars. To improve 1-MCP efficacy, ‘Tsugaru’ fruit were pre-cooled at −1 °C or −3 °C for 24 h before 1-MCP treatment. Ethylene production decreased with the cold treatment, resulting in better storage after 1-MCP treatment. Although ethylene production was low at the end of 24 h of the cold pre-treatment, expression of ACS1, the ethylene receptor genes ERS1, ETR1(a), ETR1b, ETR2 and ETR5, and the cell wall degradation-related gene PG1 all increased with a 24 h cold treatment. It is assumed that these elevated gene expression levels were not caused by ethylene, but more directly by cold stimulus. Thus, a short period of cold stimulus suppresses ethylene production, but induces expression of some genes. 1-MCP treatment was more effective with some initial fruit chilling. |
| |
| Keywords: | Ethylene Malus domestica Borkh ACC synthase ACC oxidase Endopolygalacturonase Ethylene receptor |
| 本文献已被 ScienceDirect 等数据库收录！ |
|
