1-MCP regulates ethylene biosynthesis and fruit softening during ripening of ‘Tegan Blue’ plum |
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| Affiliation: | 1. School of Molecular and Life Sciences, Curtin University, Perth 6845, WA, Australia;2. Amity Institute of Horticulture Studies and Research, Amity University, Uttar Pradesh, Noida 201313, India;3. Centre for Crop and Food Innovation, Western Australian State Agricultural Biotechnology Centre, College of Science, Health, Engineering & Education, Murdoch University, Perth WA, 6150, Australia;4. Department of Horticulture, Yezin Agricultural University, Yezin 15013, Myanmar;1. Zhengzhou Fruit Research Institute, Chinese Academy of Agricultural Sciences, Zhengzhou, 450009, China;2. Key Laboratory of Horticultural Plant Biology, Ministry of Education, Huazhong Agricultural University, Wuhan, 430070, China;3. The New Zealand Institute for Plant & Food Research Limited, Auckland, New Zealand |
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| Abstract: | To investigate the effects of postharvest application of 1-MCP on ethylene production and fruit softening, activities of ethylene biosynthesis and fruit softening enzymes were measured during postharvest ripening of plum (Prunus salicina Lindl. cv. Tegan Blue) fruit after being exposed to 1-MCP (0, 0.5, 1.0 or 2.0 μL L−1) at 20 ± 1 °C for 24 h. Following the treatments, fruit were allowed to ripen at ambient temperature (20 ± 1 °C), and ethylene production in fruit, activities of ACS and ACO, ACC content and fruit softening enzymes (PE, EGase, exo-PG and endo-PG) in fruit skin and pulp were recorded at different intervals. Postharvest application of 1-MCP significantly delayed and suppressed the climacteric ethylene production with reduction in the activities of ethylene biosynthesis enzymes (ACS, ACO) and ACC content, and fruit softening enzymes (PE, EGase, exo-PG and endo-PG) in the skin as well as in pulp tissues. The reduction was more pronounced with increased concentrations of 1-MCP. 1-MCP treated fruit showed different rates of fruit softening and activities of ethylene biosynthesis enzymes in the skin and pulp tissues which warrant further investigation on regulation of gene expression related to these enzymes with the inhibitory effect of 1-MCP. |
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