Effect of 1-MCP Treatment on Sugar Metabolism in Aksu Fuji Apples Harvested at Different Stages and Stored for Different Periods
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Abstract:
Through using Aksu Fuji apple as the test material, and analyzing the sucrose, glucose, fructose and sorbitol contents as along with sucrose phosphate synthase (SPS), sucrose synthase (SS-S, SS-C), acid invertase (AI), neutral invertase (NI) and sorbitol dehydrogenase (SDH) activity, this study examined the changes of sugar metabolism and related enzyme activities of these apples harvested at different stages. The effects of 1-MCP treatment on them were analyzed during storage (0~150 days). The obtained results showed that 1-MCP treatment during postharvest storage inhibited the increase of sucrose, glucose, fructose and sorbitol contents in Fuji apple fruit during storage, and exerted different effects on the enzymatic activities in the apples harvested at different stages. The sucrose and sorbitol contents and SDH activity in fruit decreased, whilst the contents of fructose and glucose and activities of SPS and SS-S decreased first and then increased. AI and NI showed significant peak values during storage, and 1-MCP treatment significantly increased these peaks.
