Plants being mostly sessile are exposed to several adverse environmental conditions. Many endogenous and exogenous factors play a vital role in acclimatizing plants in such varying environments. Plant growth regulators (PGRs) are one such endogenous factor that regulates the phenomenon of growth and development in plants. Strigolactone (SL) has been accepted as a new class of phytohormones or PGRs. It has contributed to different aspects of plant growth and development such as root growth and shoot branching as well as the response of plants to several biotic and abiotic stresses. Lately, a deep understanding of the SL biosynthetic pathway has been revealed. Transcriptomics and genetic analysis showed that SLs are derived from an intermediate carotenoid biosynthesis pathway, all-trans-β-carotene. Carlactone (CL) is formed from all-trans-β-carotene by the subsequent action of a set of core enzymes DWARF27 (D27), and carotenoid cleavage dioxygenases (CCD7 and CCD8). CL is the ultimate biosynthetic precursor of all naturally occurring SLs. The investigation has been also carried out on signal perception and downstream cascade involved in SL signaling by utilizing various mutants from different plant species. D14, AtD14, and DAD2 are identified as orthologous SL receptors of Oryza sativa, Arabidopsis thaliana, and Petunia, respectively. These are identified as αβ hydrolase, having the activity of both receptor and enzyme. The present review summarizes the current perception of the nature and biosynthesis of SL and the deciphering of the mechanism involved in its signal transduction cascade.

大多数无柄植物暴露在多种不​​利的环境条件下。许多内源和外源因素在植物适应如此多变的环境中发挥着至关重要的作用。植物生长调节剂（PGR）是调节植物生长和发育现象的内源因子之一。独脚金内酯 (SL) 已被认为是一类新的植物激素或 PGR。它有助于植物生长和发育的不同方面，例如根生长和芽分枝以及植物对多种生物和非生物胁迫的反应。最近，人们对 SL 生物合成途径有了深入的了解。转录组学和遗传分析表明，SL 源自中间类胡萝卜素生物合成途径，即全反式-β-胡萝卜素。卡拉内酯 (CL) 由全反式-β-胡萝卜素通过一组核心酶 DWARF27 (D27) 和类胡萝卜素裂解双加氧酶（CCD7 和 CCD8）的后续作用形成。 CL 是所有天然存在的 SL 的最终生物合成前体。通过利用来自不同植物物种的各种突变体，还对参与 SL 信号传导的信号感知和下游级联进行了研究。 D14、AtD14 和 DAD2 分别被鉴定为水稻、拟南芥和矮牵牛的直系同源 SL 受体。这些被鉴定为αβ水解酶，具有受体和酶的活性。本综述总结了目前对 SL 性质和生物合成的认识以及对其信号转导级联机制的解读。