脱落酸抗代谢与光稳定性类似物研究进展

Research Advances in Antimetabolic and Photostable Analogues of Abscisic Acid

脱落酸是一种广泛存在于植物体内的抑制性植物激素,具有诱导种子休眠、抑制种子萌发、控制气孔关闭和增强植物抗逆性等生物活性,在植物生长发育的各个阶段起着独特而重要的生理作用。但是较高的生产成本、在植物体内快速代谢失活和侧链2-位顺式双键的光异构化失活限制了脱落酸在农业生产中的应用。因此,合成并筛选出活性更高、更稳定的脱落酸类似物,是备受关注的研究领域。该文综述了脱落酸抗代谢与光稳定性研究的新进展,介绍了脱落酸抗代谢与光稳定性类似物研究中存在的问题并对今后的研究方向进行了展望。

Abscisic acid is an important phytohormone that has many functions in higher plants, including seed germina- tion, development and dormancy; regulating stomatal movement; and improving stress tolerance. However, two major drawbacks have restricted its application as a plant growth regulator for agrochemical use： It is easily metabolized in plants and this leads to concomitant loss of biological activity and geometry （2Z, 4E） of its 2, 4-pentadienoic acid moiety, which is crucial for its hormonal activities to be readily isomerized to biologically inactive （2E, 4E） isomers by light. Ac- cordingly, synthesis of new abscisic acid analogues with higher activity and better photo-stability is important. This paper reviews research advances in the chemical and biological activities of antimetabolic and photostable analogs of abscisic acid.