Abscisic acid (ABA) is a ubiquitous phytohormone, plays important roles in several physiological processes, including stress adaptation, flowering, seed germination, fruit ripening, and leaf senescence etc. ABA binds with START domain proteins called Pyrabactin Resistance1 (PYR1)/PYR1-like (PYL)/Regulatory Components of ABA Receptors (RCARs) and controls the activity of PP2C phosphatase proteins and in turn the ABA-dependent signaling pathway. Fourteen ABA receptors have been identified in the model plant Arabidopsis thaliana and have shown to be involved in various biological functions. Under field conditions, exogenous application of ABA produces inadequate physiological response due to its rapid conversion into the biologically inactive metabolites. ABA shows selective binding preferences to PYL receptor subtypes and hence produces pleiotropic physiological and phenotypic effects which limit the usage of ABA in agriculture. An agrochemical meant for ameliorating the undesirable physiological effect of the plant should ideally have positive biological attributes without affecting the normal growth, development, and yield. Therefore, to overcome the limitations of ABA for its usage in various agricultural applications, several types of ABA-mimicking agents have been developed. Many compounds have been identified as having significant ABA-agonist/antagonist activity and can be employed to reverse the excessive/moderate ABA action. The present review highlights the potential usage of ABA signaling modulators for managing agronomic and postharvest traits. Besides, designing, development and versatile usage of ABA-mimicking compounds displaying ABA agonists and antagonist activities are discussed in detail.

中文翻译：

---

ABA受体的激动剂，拮抗剂和信号传导调节剂，用于农艺和收获后管理。

脱落酸（ABA）是一种普遍存在的植物激素，在多种生理过程中起着重要作用，包括逆境适应，开花，种子发芽，果实成熟和叶片衰老等。ABA与称为Pyrabactin抗性1（PYR1）/ PYR1-的START域蛋白结合。类似于ABA受体（RCAR）的（PYL）/调节成分，并控制PP2C磷酸酶蛋白的活性，进而控制ABA依赖性信号传导途径。在模型植物拟南芥中已鉴定出14种ABA受体，并显示它们参与了多种生物学功能。在野外条件下，外源施用ABA会导致其快速转化为无生物学活性的代谢产物，从而导致生理反应不足。ABA显示出对PYL受体亚型的选择性结合偏好，因此会产生多效性生理和表型效应，从而限制了ABA在农业中的使用。理想地，旨在改善植物的不良生理作用的农用化学品应具有积极的生物学特性，而不影响正常的生长，发育和产量。因此，为了克服ABA在各种农业应用中的局限性，已经开发了几种类型的ABA模拟剂。已经鉴定出许多化合物具有显着的ABA-激动剂/拮抗剂活性，并且可以用于逆转过度/中度的ABA作用。本综述强调了ABA信号调节剂在管理农艺和收获后性状中的潜在用途。此外，设计，