The phytohormone ethylene regulates plant growth, development, and stress responses. The strict fine-tuning of the regulation of ethylene biosynthesis contributes to the diverse roles of ethylene in plants. Pyridoxal 5′-phosphate–dependent 1-aminocyclopropane-1-carboxylic acid synthase, a rate-limiting enzyme in ethylene biosynthesis, is central and often rate-limiting to regulate ethylene concentration in plants. The post-translational regulation of ACS is a major pathway controlling ethylene biosynthesis in response to various stimuli. We conclude that the regulation of ACS turnover may serve as a central hub for the rapid integration of developmental, environmental, and hormonal signals, all of which influence plant growth and stress responses.

植物激素乙烯调节植物生长、发育和应激反应。乙烯生物合成调控的严格微调有助于乙烯在植物中的多种作用。吡哆醛 5'-磷酸依赖性 1-氨基环丙烷-1-羧酸合酶是乙烯生物合成中的一种限速酶，是调节植物中乙烯浓度的核心并且通常是限速酶。ACS 的翻译后调节是控制乙烯生物合成以响应各种刺激的主要途径。我们得出结论，ACS 周转的调节可能是快速整合发育、环境和激素信号的中心枢纽，所有这些信号都会影响植物生长和应激反应。