独脚金内酯及其调控植物根系生长发育的研究进展

Reasearch Advancements on Strigolactones and Its Regulatory Effect onRoot Growth and Development in Plants

植物通过内源激素或环境信号调控根系的生长发育,进而影响根系的形态特征。独脚金内酯(strigolactones,SLs)及其衍生物作为一类新型植物激素,在刺激寄生植物种子萌发、促进丛枝菌根真菌菌丝分枝和养分吸收、介导植物对病原菌及营养匮乏等逆境胁迫的抗性反应、调控植物分枝结构等方面发挥着重要作用。此外,研究表明,独脚金内酯还参与调控植物主根生长、侧根的形成、不定根和根毛的发生和伸长等根系生长发育过程。本综述总结了独脚金内酯的结构和生物学功能、生物合成和信号转导途径,及其在调控植物根系生长发育的研究进展,并探讨了其研究方向和应用前景,旨在为独脚金内酯的深入研究提供借鉴。

Plants can regulate the root growth and development through endogenous hormones or environmental signal,further affecting their root morphological characteristics.Strigolactones(SLs)and their derivatives are a novel kind of phytohormones,which play an important role in promoting the branching of arbuscular mycorrhizal fungi and nutrient absorption,stimulating the seed germination of parasitic plants,mediating plant resistance to pathogen and nutrient deficiency stress,and regulating the shoot-branching of plants.In addition,some studies have shown that SLs also participate in the regulation of growth of primary root,formation of lateral root,formation and elongation of adventitious root and root hairs in plants.This review concludes the structures and biological functions,biosynthesis and signal transduction pathways of strigolactones,as well as the research progress in regulating the root growth and development in plants.The research direction and application prospects about strigolactones were also discussed.This study will provide reference for further in-depth study of strigolactones.