Abscisic acid (ABA) plays a major role in the regulation of strawberry fruit ripening; however, the origin of the ABA signal is largely unknown. Here, we report an autocatalytic mechanism for ABA biosynthesis and its synergistic interaction with the auxin to regulate strawberry fruit ripening. We demonstrate that ABA biosynthesis is self-induced in the achenes, but not in the receptacle, which results its substantial accumulation during ripening. ABA was found to regulate both IAA transport and biosynthesis, thereby modulating IAA content during both early fruit growth and later during ripening. Taken together, these results reveal the origins of the ABA signal and demonstrate the importance of its coordinated action with IAA in the regulation of strawberry fruit development and ripening.

中文翻译：

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脱落酸的自催化生物合成及其与生长素的协同作用调控草莓果实成熟[J].

脱落酸（ABA）在草莓果实成熟调控中起主要作用；然而，ABA 信号的来源在很大程度上是未知的。在这里，我们报告了 ABA 生物合成的自催化机制及其与生长素的协同相互作用以调节草莓果实成熟。我们证明 ABA 的生物合成是在瘦果中自我诱导的，而不是在花托中，这导致其在成熟过程中大量积累。发现 ABA 可调节 IAA 转运和生物合成，从而在果实早期生长和成熟后期调节 IAA 含量。总之，这些结果揭示了 ABA 信号的起源，并证明了其与 IAA 协同作用在调节草莓果实发育和成熟中的重要性。