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. 2021 Jun 22;11:13075. doi: 10.1038/s41598-021-92080-8

Figure 8.

Figure 8

A working model for GA control of fruit ripening in sweet cherry. In early-season varieties, ABA pathways are activated earlier due to the downregulation of GA biosynthesis and negative regulation of GA over the ABA pathway. In contrast, in mid- or late-season varieties, ripening is delayed, in a mechanism possibly involving ABA negative regulators PP2Cs inactivation by MYB44. This effect is transient and can be overcame with higher ABA levels. In contrast, lower ABA in early-season varieties would be a more permanent effect of GA, potentiated by IAA pathway activation, which antagonizes ripening. Finally, GA should activate ethylene biosynthesis, which in turn controls the ABA pathway. Figure performed on Microsoft PowerPoint, version 18.2008.12711.0, https://www.microsoft.com/es-cl/microsoft-365/powerpoint.