Transcription Factor Participates in Starch-Sugar Metabolism by Binding to the Promoter in Apples During Postharvest Storage.

Starch degradation with fruit ripening is closely related to the aging process and flavor formation in apples. In this study, ethylene, 1-methylcyclopropene (1-MCP), and apples treated at different temperatures were used to determine the key genes of starch-sugar metabolism during storage. Compared with 4 °C storage, 20 °C storage promoted starch degradation and sugar accumulation in apples. In addition, ethylene treatment promoted starch degradation and sugar accumulation in apples, while 1-MCP treatment showed the opposite effects. The expression of indicated the crucial role of in starch-sugar conversion. Transient overexpression of significantly reduced the starch content in apples. Furthermore, directly combined the promoter and activated the expression, which may promote the starch degradation in apples. Therefore, it was concluded that may be involved in the regulation of starch-sugar metabolism in postharvest apples by activating the expression.