Figure 2.

Diagram showing the pattern of hormonal regulation of strawberry fruit ripening. IAA is synthesized in achenes and then transported to the receptacle, whereby promoting receptacle growth and suppressing fruit ripening. Along with fruit development and ripening, ABA accumulates in both achenes and receptacle. ABA accumulation in the achenes acts to suppress the IAA biosynthesis and transport to the receptacle, resulting in a decrease in the IAA level of the receptacle and release of the ripening inhibition. ABA accumulation in the receptacle acts to initiate ripening-associated metabolisms, and JA accumulation may likely act to regulate the ripening-associated events at a later ripening stage. As such, strawberry fruit ripening is regulated by a synergistic action of multiple hormones.